Quote:
Originally Posted by gregbradley
I am wondering whether a 3200ME chip would be more suitable for my setup than the 8300 chip.
I am planning to use it on my CDK17 at 1950mm and 2959 focal length
as well as my TE180 which is 1260mm focal length and F7.
The 8300 works quite well with the TEC and only change I would make is using shorter subexposures to prevent bloated bright stars.
The 8300 isn't a great match at 2959 focal length with the smaller pixels (5.4 microns) unless the seeing is really good. I haven't used it at 1950mm yet but I imagine it will perform better.
The 3200ME is much more sensitive and I think is a very good chip for galaxy images which is what I would mainly use it for on the TEC or CDK.
It has slightly larger pixels at 6.6 microns.
But it is also only 3.2 megapixels. Perhaps that is less important but it also has a narrow FOV.
Opinions?
Greg.
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Well depth for Galaxies Greg. The 8300 is too short on that and the stars always seem huge despite the advantage of being able to sharpen endlessly when over sampled. I got a STL11K for my narrow length stuff because larger pixels will be easier on stars and the stars don't appear to be monsterous.
For the TEC though mate I am going 20 minutes in a few colours and only found a couple of times that the stars are a pain with the 8300. I know you have a bit more diameter but go longer on your subs. You can process out bloated stars a little by using masks and the minimum funtion.
Field of view is really an issue if you want that wide expanse with a numbr of detailed galaxies. Why not use your 16803 on the CDK? Surely that will work on that scope. Is it image circle? Good well depth, big field that you can crop to suit. I know you have the field correction now, so what is the issue?