Target Framing, Imaging FOV
Posted: Sun Feb 05, 2017 10:05 am
Given the recent discussion about framing your target and plate solving, I'm attaching the FOV image below w/Andy's NGC 2336 / IC 467.
This was done in SkySafari Pro 5.0 on macOS, but similar features exist in many other planetarium applications like Stellarium and StarryNight. You can also use tools on the web like http://astronomy.tools for such calculations. This is a good place to start when choosing what camera/scope combination is going to yield the optimal framing for your target. (Assuming you have more than one choice, of course!)
The inner most square (Green Arrow) is Andy's scope w/the QSI640 [ http://www.qsimaging.com/640-overview.html ]. The scope is set at 317mm x 2130mm w/the camera chip on the QSI640 at 15mm x 15mm (4.2MP). Hopefully that's correct.
The next square (Yellow Arrow) is a C8 EdgeHD 203mm x 2032mm w/ASI1600MM-C 17.7mm x 13.4mm.
Finally, the outer most rectangle is my AT130EDT 130mm x 910mm w//ASI1600MM-C 17.7mm x 13.4mm.
Other things come into play here like camera pixel size and focal length (sampling), but that's another discussion for another time.
This was done in SkySafari Pro 5.0 on macOS, but similar features exist in many other planetarium applications like Stellarium and StarryNight. You can also use tools on the web like http://astronomy.tools for such calculations. This is a good place to start when choosing what camera/scope combination is going to yield the optimal framing for your target. (Assuming you have more than one choice, of course!)
The inner most square (Green Arrow) is Andy's scope w/the QSI640 [ http://www.qsimaging.com/640-overview.html ]. The scope is set at 317mm x 2130mm w/the camera chip on the QSI640 at 15mm x 15mm (4.2MP). Hopefully that's correct.
The next square (Yellow Arrow) is a C8 EdgeHD 203mm x 2032mm w/ASI1600MM-C 17.7mm x 13.4mm.
Finally, the outer most rectangle is my AT130EDT 130mm x 910mm w//ASI1600MM-C 17.7mm x 13.4mm.
Other things come into play here like camera pixel size and focal length (sampling), but that's another discussion for another time.