SkySync User Guide – SkySync Support We currently have 59 Nextar gps models with downloadable PDF manuals. You can find the model number and total number of manuals listed below.
Celestron 93969 SkySync GPS Accessory Amazon.ca Camera. Redirecting to https://www.telescopeplanet.co.uk/celestron-skysync-gps-module/65272., View and Download Celestron CN-16 user manual online. GPS Accessory. CN-16 GPS pdf manual download. Also for: 93963..
Adds GPS to Celestron Computerised Telescopes Adds GPS to Celestron computerised telescopes for accurate alignment, without the need to manually enter time and location. Improve the accuracy of your initial star alignments by plugging in the GPS module into your telescope's drive base port. The SkySync will link up and automatically download the exact time, date longitude and latitude from one Add GPS to your Celestron computerized telescope and get time, date, and location downloads from orbiting global positioning satellites. This 16-channel GPS module plugs into your telescope’s hand control or the auxiliary (aux) port on your drive base and then mounts to a tripod leg to stay safely out of the way with included straps.
Celestron 93969 Sky Sync GPS Accessory, black, non-monocular 5.0 Store: Shop4645046 Store. US $284.90 27/10/2016 · The Celestron SkySync will link up and automatically download the exact time, date longitude and latitude from orbiting Global Positioning Satellites. This is especially convenient for those who travel to different observing locations. Celestron SkySync GPS Accessory - General Features. 16-channel GPS module
The SkySync GPS Accessory from Celestron boasts a 16-channel GPS module. It will improve the accuracy of your initial star alignments thereby gaining more precise go-to movements as you view the night sky. It will save you the time and hassle of trying to align your scope for the night's sky-watching. Celestron Skysync Gps Instructions Instructions included. Here's what Celestron says about it. The Celestron SkySync GPS Accessory is compatible with all Celestron computerized telescopes! INSTRUCTION MANUAL GPS On/Off. Congratulations on your purchase of the Celestron NexStar! The NexStar ushers in a whole new generation.
GPS for Celestron computerised goto telescopes allowing accurate and fast alignment, without the need to manually enter time and location. Improve the accuracy of your initial star alignments by plugging in the GPS module into your telescope's drive base port. The SkySync will link up and automatically download the exact time, date longitude and latitude from one of many global positioning GPS for Celestron computerised goto telescopes allowing accurate and fast alignment, without the need to manually enter time and location. Improve the accuracy of your initial star alignments by plugging in the GPS module into your telescope's drive base port. The SkySync will link up and automatically download the exact time, date longitude and latitude from one of many global positioning
View and Download Celestron CN-16 user manual online. GPS Accessory. CN-16 GPS pdf manual download. Also for: 93963. The CPC’s deluxe features combined with Celestron’s legendary Schmidt-Cassegrain optical systems give amateur astronomers the most sophisticated and easy to use telescopes available on the market today. Take time to read through this manual before embarking on your journey through the Universe. It may take a few observing sessions to
Buy Celestron 93969 sky Sync GPS Accessory-Black with fast shipping and top-rated customer service.Once you know, you Newegg! As long as the software supports this format, regardless of the manufacturer (the same work works Celestron pdf brand guides), it can read the file(s) without a hitch. Nevertheless, the PDF viewers that are worth recommending include Foxit Reader , Adobe Acrobat Reader DC , Nitro PDF Reader , etc.
NexStar Hand Control Version 4 User's Guide for CPC, NexStar GPS, NexStar 5i/8i/8i Special Edition, NexStar SE, Celestron introduced NexStar hand control version 4. First available to the public with 2. For scopes with a PC Port on the mount (NexStar GPS, CPC and CGE) connect the serial port on Redirecting to https://www.telescopeplanet.co.uk/celestron-skysync-gps-module/65272.
Celestron UK have today informed us that it has come to their attention that the latest version of the AVX Mount is not functioning correctly with Celestron’s SkySync GPS unit. Celestron USA are working on a fix for this but as of today there is no estimated time-frame for a solution. Celestron Skysync Gps Instructions Instructions included. Here's what Celestron says about it. The Celestron SkySync GPS Accessory is compatible with all Celestron computerized telescopes! INSTRUCTION MANUAL GPS On/Off. Congratulations on your purchase of the Celestron NexStar! The NexStar ushers in a whole new generation.
03/04/2016 · The SkySync GPS Accessory unit should work with any computerized Celestron telescope. Plugs into hand control or auxiliary port. It will automatic location information to your telescope. But Celestron SkySync GPS Accessory. Works on ALL Celestron Computerized Telescopes! Improve the accuracy of your initial star alignments by plugging in the GPS module into your telescope's drive base port. The SkySync will link up and automatically download the exact time, date longitude and latitude from one of many global positioning satellites.
Adds GPS to Celestron Computerised Telescopes Adds GPS to Celestron computerised telescopes for accurate alignment, without the need to manually enter time and location. Improve the accuracy of your initial star alignments by plugging in the GPS module into your telescope's drive base port. The SkySync will link up and automatically download the exact time, date longitude and latitude from one Find helpful customer reviews and review ratings for Celestron - SkySync Telescope GPS Accessory – Automatically Updates your Telescope with 16-channel GPS Data, Time, and Date - Save Time & Improve the Accuracy of your Telescope Alignment at Amazon.com. Read …
The NexStar’s deluxe features combined with Celestron’s legendary optical standards give amateur astronomers one of the most sophisticated and easy to use telescopes available on the market today. Take time to read through this manual before embarking on your journey through the Universe. It may take a few observing Celestron CN-16 Manuals & User Guides. User Manuals, Guides and Specifications for your Celestron CN-16 GPS. Database contains 1 Celestron CN-16 Manuals (available for free online viewing or downloading in PDF): Operation & user’s manual .
Celestron SkySync GPS First Light Optics. Buy Celestron 93969 sky Sync GPS Accessory-Black with fast shipping and top-rated customer service.Once you know, you Newegg!, 27/10/2016 · The Celestron SkySync will link up and automatically download the exact time, date longitude and latitude from orbiting Global Positioning Satellites. This is especially convenient for those who travel to different observing locations. Celestron SkySync GPS Accessory - General Features. 16-channel GPS module.
Celestron SkyPortal WiFi Module Celestron UK. Find helpful customer reviews and review ratings for Celestron 93969 SkySync GPS Accessory at Amazon.com. Read honest and unbiased product reviews from our users. 27/10/2016 · The Celestron SkySync will link up and automatically download the exact time, date longitude and latitude from orbiting Global Positioning Satellites. This is especially convenient for those who travel to different observing locations. Celestron SkySync GPS Accessory - General Features. 16-channel GPS module.
Celestron SkySync GPS Accessory for all Celestron Computerized Telescopes - 93969 - Works on all Celestron Computerized Telescopes! Improve the accuracy of your initial star alignments by plugging in the GPS module into your telescope's drive base... 27/06/2016 · This is the second SkySync / GPS Accessory I've tried from Celestron and they both have the same problem. Maybe it's not compatible with my AVX mount. The biggest problem with the invalid
21/05/2019 · Celestron SkySync GPS Accessory Features. Upgrade your Celestron computerized telescope to GPS with SkySync. Improve the speed and accuracy of alignments with 16-channel GPS. Compatible with all non-GPS Celestron computerized telescopes; Plugs into your telescope's hand control or auxiliary port 03/04/2016 · The SkySync GPS Accessory unit should work with any computerized Celestron telescope. Plugs into hand control or auxiliary port. It will automatic location information to your telescope. But
27/10/2016 · The Celestron SkySync will link up and automatically download the exact time, date longitude and latitude from orbiting Global Positioning Satellites. This is especially convenient for those who travel to different observing locations. Celestron SkySync GPS Accessory - General Features. 16-channel GPS module SkySync User Guide Attached below is the SkySync User Guide that is included with every installation of SkySync. Submit a request Sign in. SkySync Attached below is the SkySync User Guide that is included with every installation of SkySync. SkySync User Guide.pdf (3 MB) Andrew Beard - November 08, 2017 14:20. Was this article helpful? 0 out
14/10/2019 · Celestron SkySync GPS Accessory - All Computerized Celestron Models. The Celestron SkySync GPS Accessory improves the pointing accuracy of your initial star alignments by plugging this 16 Channel GPS module into any non-GPS Celestron telescope's drive base port. The SkySync will automatically download the exact time, date longitude and latitude from the nearest global positioning … The SkySync GPS Accessory from Celestron boasts a 16-channel GPS module. It will improve the accuracy of your initial star alignments thereby gaining more precise go-to movements as you view the night sky. It will save you the time and hassle of trying to align your scope for the night's sky-watching.
Celestron SkySync GPS Accessory. Works on ALL Celestron Computerized Telescopes! Improve the accuracy of your initial star alignments by plugging in the GPS module into your telescope's drive base port. The SkySync will link up and automatically download the exact time, date longitude and latitude from one of many global positioning satellites. 14/10/2019 · Celestron SkySync GPS Accessory - All Computerized Celestron Models. The Celestron SkySync GPS Accessory improves the pointing accuracy of your initial star alignments by plugging this 16 Channel GPS module into any non-GPS Celestron telescope's drive base port. The SkySync will automatically download the exact time, date longitude and latitude from the nearest global positioning …
Celestron UK have today informed us that it has come to their attention that the latest version of the AVX Mount is not functioning correctly with Celestron’s SkySync GPS unit. Celestron USA are working on a fix for this but as of today there is no estimated time-frame for a solution. Find helpful customer reviews and review ratings for Celestron 93969 SkySync GPS Accessory at Amazon.com. Read honest and unbiased product reviews from our users.
Celestron UK have today informed us that it has come to their attention that the latest version of the AVX Mount is not functioning correctly with Celestron’s SkySync GPS unit. Celestron USA are working on a fix for this but as of today there is no estimated time-frame for a solution. Celestron UK have today informed us that it has come to their attention that the latest version of the AVX Mount is not functioning correctly with Celestron’s SkySync GPS unit. Celestron USA are working on a fix for this but as of today there is no estimated time-frame for a solution.
Celestron SkySync/GPS. I received the Celestron SkySync in good order and it mounted easily with the velcro straps included. It also plugged into and accessory slot on my AVX mount. I have not had decent weather to use this outdoors yet, however it has two goals. of the manual concerning the use of your optical tube Remove all the pieces from their respective inner boxes and place on a flat, clear work area A large floor space is ideal When setting up your Celestron mount, you must start with the tripod and work up from there polar alignment. These instructions are
27/06/2016 · This is the second SkySync / GPS Accessory I've tried from Celestron and they both have the same problem. Maybe it's not compatible with my AVX mount. The biggest problem with the invalid Find helpful customer reviews and review ratings for Celestron - SkySync Telescope GPS Accessory – Automatically Updates your Telescope with 16-channel GPS Data, Time, and Date - Save Time & Improve the Accuracy of your Telescope Alignment at Amazon.com. Read …
Redirecting to https://www.telescopeplanet.co.uk/celestron-skysync-gps-module/65272. 03/04/2016 · The SkySync GPS Accessory unit should work with any computerized Celestron telescope. Plugs into hand control or auxiliary port. It will automatic location information to your telescope. But
The Celestron SkySync adds GPS (Global Positioning System) accuracy to all non-GPS go-to computerized Celestron telescopes. It works with both altazimuth and German equatorial mount Celestrons, and is powered by your scope (no batteries needed). Add GPS to your Celestron computerized telescope and get time, date, and location downloads from orbiting Global Positioning Satellites. This 16-channel GPS module plugs into your telescope’s hand control or the auxiliary (AUX) port on your drive base and then mounts to a tripod leg to stay safely out of the way with included straps.
Manuals NexStar Resource Site - Celestron. Celestron SkySync GPS Accessory. The Celestron SkySync GPS Accessory is compatible with most* Celestron computerized telescopes! This accessory module by Celestron is a 16-channel GPS receiver which uses orbiting Global Positioning Satellites (GPS) to determine the exact location of your telescope equipment on the Earth as well as other important data which your scope needs to locate celestial, 26/03/2012 · Thought I would give a quick review of this item Celestron SkySync GPS for anyone thinking of getting one My friend who bought my 8SE from me was getting a little frustrated with having to keep imputing time/date etc every time on set up although it is quite simple enough to do he would often mak....
www.telescopeplanet.co.uk. Celestron SkySync/GPS. I received the Celestron SkySync in good order and it mounted easily with the velcro straps included. It also plugged into and accessory slot on my AVX mount. I have not had decent weather to use this outdoors yet, however it has two goals., Adds GPS to Celestron Computerised Telescopes Adds GPS to Celestron computerised telescopes for accurate alignment, without the need to manually enter time and location. Improve the accuracy of your initial star alignments by plugging in the GPS module into your telescope's drive base port. The SkySync will link up and automatically download the exact time, date longitude and latitude from one.
of the manual concerning the use of your optical tube Remove all the pieces from their respective inner boxes and place on a flat, clear work area A large floor space is ideal When setting up your Celestron mount, you must start with the tripod and work up from there polar alignment. These instructions are Celestron SkySync GPS Accessory. The Celestron SkySync GPS Accessory is compatible with most* Celestron computerized telescopes! This accessory module by Celestron is a 16-channel GPS receiver which uses orbiting Global Positioning Satellites (GPS) to determine the exact location of your telescope equipment on the Earth as well as other important data which your scope needs to locate celestial
27/06/2016 · This is the second SkySync / GPS Accessory I've tried from Celestron and they both have the same problem. Maybe it's not compatible with my AVX mount. The biggest problem with the invalid 22/01/2019 · With this, you will still have to enter the date and time, and location, it should have a GPS that would do both. They do a GPS add on, Celestron SkySync, which, though it works, is firstly expensive, and secondly, requires you to go through their menu system to change a setting hidden in there to use it.
29/08/2019 · StarSense and SkySync GPS - posted in Celestron Computerized Telescopes: Im sure this has been addressed many times before, so I apologize if Im being redundant. I am about to start up my StarSense for the first time. I also have SkySync GPS. After SS Auto Align, camera centering, and final alignment, where can I check to see if the HC has accepted SSyncs data? Again, if you could point me … 14/10/2019 · Celestron SkySync GPS Accessory - All Computerized Celestron Models. The Celestron SkySync GPS Accessory improves the pointing accuracy of your initial star alignments by plugging this 16 Channel GPS module into any non-GPS Celestron telescope's drive base port. The SkySync will automatically download the exact time, date longitude and latitude from the nearest global positioning …
The SkySync GPS Accessory from Celestron boasts a 16-channel GPS module. It will improve the accuracy of your initial star alignments thereby gaining more precise go-to movements as you view the night sky. It will save you the time and hassle of trying to align your scope for the night's sky-watching. NexStar Hand Control Version 4 User's Guide for CPC, NexStar GPS, NexStar 5i/8i/8i Special Edition, NexStar SE, Celestron introduced NexStar hand control version 4. First available to the public with 2. For scopes with a PC Port on the mount (NexStar GPS, CPC and CGE) connect the serial port on
Celestron 93969 Sky Sync GPS Accessory, black, non-monocular 5.0 Store: Shop4645046 Store. US $284.90 26/03/2012 · Thought I would give a quick review of this item Celestron SkySync GPS for anyone thinking of getting one My friend who bought my 8SE from me was getting a little frustrated with having to keep imputing time/date etc every time on set up although it is quite simple enough to do he would often mak...
26/03/2012 · Thought I would give a quick review of this item Celestron SkySync GPS for anyone thinking of getting one My friend who bought my 8SE from me was getting a little frustrated with having to keep imputing time/date etc every time on set up although it is quite simple enough to do he would often mak... 27/10/2016 · The Celestron SkySync will link up and automatically download the exact time, date longitude and latitude from orbiting Global Positioning Satellites. This is especially convenient for those who travel to different observing locations. Celestron SkySync GPS Accessory - General Features. 16-channel GPS module
Redirecting to https://www.telescopeplanet.co.uk/celestron-skysync-gps-module/65272. NexStar Hand Control Version 4 User's Guide for CPC, NexStar GPS, NexStar 5i/8i/8i Special Edition, NexStar SE, Celestron introduced NexStar hand control version 4. First available to the public with 2. For scopes with a PC Port on the mount (NexStar GPS, CPC and CGE) connect the serial port on
26/03/2012 · Thought I would give a quick review of this item Celestron SkySync GPS for anyone thinking of getting one My friend who bought my 8SE from me was getting a little frustrated with having to keep imputing time/date etc every time on set up although it is quite simple enough to do he would often mak... Add GPS to your Celestron computerized telescope and get time, date, and location downloads from orbiting global positioning satellites. This 16-channel GPS module plugs into your telescope’s hand control or the auxiliary (aux) port on your drive base and then mounts to a tripod leg to stay safely out of the way with included straps.
27/10/2016 · The Celestron SkySync will link up and automatically download the exact time, date longitude and latitude from orbiting Global Positioning Satellites. This is especially convenient for those who travel to different observing locations. Celestron SkySync GPS Accessory - General Features. 16-channel GPS module Celestron SkySync GPS Accessory. Works on ALL Celestron Computerized Telescopes! Improve the accuracy of your initial star alignments by plugging in the GPS module into your telescope's drive base port. The SkySync will link up and automatically download the exact time, date longitude and latitude from one of many global positioning satellites.
27/06/2016 · This is the second SkySync / GPS Accessory I've tried from Celestron and they both have the same problem. Maybe it's not compatible with my AVX mount. The biggest problem with the invalid 27/10/2016 · The Celestron SkySync will link up and automatically download the exact time, date longitude and latitude from orbiting Global Positioning Satellites. This is especially convenient for those who travel to different observing locations. Celestron SkySync GPS Accessory - General Features. 16-channel GPS module
The SkySync GPS Accessory from Celestron boasts a 16-channel GPS module. It will improve the accuracy of your initial star alignments thereby gaining more precise go-to movements as you view the night sky. It will save you the time and hassle of trying to align your scope for the night's sky-watching. Redirecting to https://www.telescopeplanet.co.uk/celestron-skysync-gps-module/65272.
INSTRUCTION MANUAL Amazon Web Services. At Celestron we are committed to dedicating our engineering resources to the research . and development of new product innovations; including regularly enhancing our extensive line of product accessories. Each accessory category is carefully and consistently reviewed to provide our customers with the highest quality, state-of-the-art accessories., Celestron Skysync Gps Instructions Instructions included. Here's what Celestron says about it. The Celestron SkySync GPS Accessory is compatible with all Celestron computerized telescopes! INSTRUCTION MANUAL GPS On/Off. Congratulations on your purchase of the Celestron NexStar! The NexStar ushers in a whole new generation..
Celestron SkySync GPS Accessory 93969 Skies Unlimited. The NexStar’s deluxe features combined with Celestron’s legendary optical standards give amateur astronomers one of the most sophisticated and easy to use telescopes available on the market today. Take time to read through this manual before embarking on your journey through the Universe. It may take a few observing, 03/04/2016 · The SkySync GPS Accessory unit should work with any computerized Celestron telescope. Plugs into hand control or auxiliary port. It will automatic location information to your telescope. But.
Celestron SkySync GPS Unit Rother Valley Optics Ltd. The SkySync GPS Accessory from Celestron boasts a 16-channel GPS module. It will improve the accuracy of your initial star alignments thereby gaining more precise go-to movements as you view the night sky. It will save you the time and hassle of trying to align your scope for the night's sky-watching. Version 1.6 GPS Manual Addendum - for those upgrading from 1.2 NexStar GT, StarSeeker and Tasco StarGuide Hand Control Version 4 User's Guide - authored by Mike Swanson; written between the first and second editions of The NexStar User's Guide , includes coverage through version 4.18 and is a good resource for those upgrading from an older version to the version 4 hand control..
SkyPortal WiFi module is compatible with all current Celestron computerised telescopes and selected older models. Easy to set up and use Wirelessly align and control your telescope using smartphone or tablet with Celestron’s free SkyPortal app SkyPortal app works with iOS and Android devices Easy to use: tap any celestial object you see in display's sky to identify it instantly. Tap again This addendum accompanies the StarSense AutoAlign manual. Refer to this addendum to setup StarSense on your Sky-Watcher OPTIONAL SKYSYNC GPS ACCESSORY The additional AUX port can facilitate Celestron’s SkySync GPS Accessory (#93969). Use of the optional GPS Accessory will eliminate the need to enter date,
03/04/2016 · The SkySync GPS Accessory unit should work with any computerized Celestron telescope. Plugs into hand control or auxiliary port. It will automatic location information to your telescope. But Celestron SkySync GPS Accessory. The Celestron SkySync GPS Accessory is compatible with most* Celestron computerized telescopes! This accessory module by Celestron is a 16-channel GPS receiver which uses orbiting Global Positioning Satellites (GPS) to determine the exact location of your telescope equipment on the Earth as well as other important data which your scope needs to locate celestial
29/08/2019 · StarSense and SkySync GPS - posted in Celestron Computerized Telescopes: Im sure this has been addressed many times before, so I apologize if Im being redundant. I am about to start up my StarSense for the first time. I also have SkySync GPS. After SS Auto Align, camera centering, and final alignment, where can I check to see if the HC has accepted SSyncs data? Again, if you could point me … NexStar Hand Control Version 4 User's Guide for CPC, NexStar GPS, NexStar 5i/8i/8i Special Edition, NexStar SE, Celestron introduced NexStar hand control version 4. First available to the public with 2. For scopes with a PC Port on the mount (NexStar GPS, CPC and CGE) connect the serial port on
Celestron CN-16 Manuals & User Guides. User Manuals, Guides and Specifications for your Celestron CN-16 GPS. Database contains 1 Celestron CN-16 Manuals (available for free online viewing or downloading in PDF): Operation & user’s manual . The SkySync GPS Accessory from Celestron boasts a 16-channel GPS module. It will improve the accuracy of your initial star alignments thereby gaining more precise go-to movements as you view the night sky. It will save you the time and hassle of trying to align your scope for the night's sky-watching.
Improve the accuracy of your initial star alignments by plugging in the GPS module into your telescope's drive base port. The SkySync will link up and automatically download the exact time, date longitude and latitude from one of many global positioning satellites. - 16-channel GPS module - Compatible with all non-GPS Celestron computerized The SkySync GPS Accessory from Celestron boasts a 16-channel GPS module. It will improve the accuracy of your initial star alignments thereby gaining more precise go-to movements as you view the night sky. It will save you the time and hassle of trying to align your scope for the night's sky-watching.
21/05/2019 · Celestron SkySync GPS Accessory Features. Upgrade your Celestron computerized telescope to GPS with SkySync. Improve the speed and accuracy of alignments with 16-channel GPS. Compatible with all non-GPS Celestron computerized telescopes; Plugs into your telescope's hand control or auxiliary port The NexStar’s deluxe features combined with Celestron’s legendary optical standards give amateur astronomers one of the most sophisticated and easy to use telescopes available on the market today. Take time to read through this manual before embarking on your journey through the Universe. It may take a few observing sessions to
Redirecting to https://www.telescopeplanet.co.uk/celestron-skysync-gps-module/65272. of the manual concerning the use of your optical tube Remove all the pieces from their respective inner boxes and place on a flat, clear work area A large floor space is ideal When setting up your Celestron mount, you must start with the tripod and work up from there polar alignment. These instructions are
We currently have 59 Nextar gps models with downloadable PDF manuals. You can find the model number and total number of manuals listed below. SkyPortal WiFi module is compatible with all current Celestron computerised telescopes and selected older models. Easy to set up and use Wirelessly align and control your telescope using smartphone or tablet with Celestron’s free SkyPortal app SkyPortal app works with iOS and Android devices Easy to use: tap any celestial object you see in display's sky to identify it instantly. Tap again
Celestron SkySync/GPS. I received the Celestron SkySync in good order and it mounted easily with the velcro straps included. It also plugged into and accessory slot on my AVX mount. I have not had decent weather to use this outdoors yet, however it has two goals. Find helpful customer reviews and review ratings for Celestron 93969 SkySync GPS Accessory at Amazon.com. Read honest and unbiased product reviews from our users.
Adds GPS to Celestron Computerised Telescopes Adds GPS to Celestron computerised telescopes for accurate alignment, without the need to manually enter time and location. Improve the accuracy of your initial star alignments by plugging in the GPS module into your telescope's drive base port. The SkySync will link up and automatically download the exact time, date longitude and latitude from one The Celestron SkySync adds GPS (Global Positioning System) accuracy to all non-GPS go-to computerized Celestron telescopes. It works with both altazimuth and German equatorial mount Celestrons, and is powered by your scope (no batteries needed).
GPS for Celestron computerised goto telescopes allowing accurate and fast alignment, without the need to manually enter time and location. Improve the accuracy of your initial star alignments by plugging in the GPS module into your telescope's drive base port. The SkySync will link up and automatically download the exact time, date longitude and latitude from one of many global positioning 27/06/2016 · This is the second SkySync / GPS Accessory I've tried from Celestron and they both have the same problem. Maybe it's not compatible with my AVX mount. The biggest problem with the invalid