STT-3200 with OAG FOV in SkyX...

I have the STT-3200 with the STT filterwheel and OAG. How can I get the FOV (field of view) displayed in SkyX for both the imaging CCD sensor and the CCD sensor of the autoguider?

Thanks,
Khushrow

 

You can add one of the dual chip cameras and adjust as needed.
What scope do you have. I can give you the exact FOV.

 

I have a Celestron Edge 11" and a TV NP101is. Thanks for your suggestion, I can make the changes also. Will the offset between the two sensors be accurate if I use the the dual chip cameras that are already in the offset?

Thanks,
Khushrow

 

here are the stats on the 3200 and two OTA's.
Hope this helps.

KAF-3200 and HD 11
Focal Length= 2800 millimeters = 110.2362205 inches
Chip Size (x)= 14.85 millimeters = 0.584645669 inches
Chip Size (y)= 10.26 millimeters = 0.403937008 inches
Pixel Size (x)= 6.8 microns
Pixel Size (y)= 6.8 microns
Field of View (x)= 0.3039 degrees = 18.23 minutes
Field of View (y)= 0.2100 degrees = 12.60 minutes
Image Scale= 73.67 arc sec/mm
Arc Seconds/Pixel (x)= 0.5010 arc seconds
Arc Seconds/Pixel (y)= 0.5010 arc seconds

KAF-3200 and NP101
Focal Length= 540 millimeters = 21.25984252 inches
Chip Size (x)= 14.85 millimeters = 0.584645669 inches
Chip Size (y)= 10.26 millimeters = 0.403937008 inches
Pixel Size (x)= 6.8 microns
Pixel Size (y)= 6.8 microns
Field of View (x)= 1.5758 degrees = 94.55 minutes
Field of View (y)= 1.0887 degrees = 65.32 minutes
Image Scale= 382.00 arc sec/mm
Arc Seconds/Pixel (x)= 2.5976 arc seconds
Arc Seconds/Pixel (y)= 2.5976 arc seconds

 

Thanks for the info, this definitely helps for the main imager. The other open item is by how much do I offset the chip on the OAG from the main imager?

Thanks,
Khushrow

 

That will change depending on the adjustment of the prism.
The best thing to do is to look at a common object and measure it on the screen.
Edit the 2nd box until it matches the star pattern.
Start with one of the dual chip selections as we discussed and then edit until it's exact.
You have the box for the main imager.
I am not on the SkyX forum, you can check there as well.

 

If the linear distance is known, a main sensor plate solution will reveal the true focal length, from which the angular distance of the guide sensor maybe calculated. It may not be possible to solve the guider if long focal length (tiny FOV).

 

Good point Bob,
If not enough stars in the tracking CCD then it might not solve.
He can still edit the FOV parameters by matching what he sees on both FOV's on the screen.