|
My scope runs at 0.86 arc sec/pixel typically. I think it's good to have that level of resolution sometimes, when the seeing is good. The rest of the time it would be better to have larger pixels.
I often think my ideal would be a camera of reasonable megapixel size such that when binned 2x2 it still results in a nice sized image. That way, I would get a camera that results in about 1 arc sec/pixel when at 1x1, and on nights of average viewing use it at 2x2. This theory doesn't work with my current camera (ST7) because the chip is so small at 2x2 I get a tiny image, so I pretty much stay at 1x1 which is the 0.86.
There are cameras with larger pixel sizes than 9um. But the larger the pixel the more expensive the camera. Because of that cost I have been thinking in recent times it's better to get a large megapixel camera which can bin 2x2, so you save cost and probably end up with a larger resulting image anyhow. You'd probably end up with more sensitivity that way too. My theory might be wrong, I haven't done the maths with great care.
Roger.
|