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Does image scale matter on a guide camera?
So far I've been using the ASI290MM as a guide camera AND a planetary imaging camera, and I've been pretty happy with it.
However, i was thinking of getting another camera just for guiding, so I don't have to break apart my imaging train when imaging different objects (I have separate planetary and deep sky filter wheels).
The thing is ASI290's are not that common at the moment so it got me thinking about the ASI174 mini.
It has the same resolution, but the pixels are bigger - the sensor is twice the size of the ASI290!
So will that double my guiding error? Does it make a difference?
It may also give me more guide stars to choose from, I guess? I'm assuming a bigger sensor would capture a wider field of view?
Cheers
Markus
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