Quote:
Originally Posted by John K
Ok - so what does this mean in terms of 5-10 minute subs? Simply lower noise?
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For best SNR you need to take subs that are long enough that the read noise becomes insignificant. If the read noise is small then you can take short subs. It's difficult to say whether that's one, two, five or ten minutes since that depends on a number of factors, including sky glow.
Quote:
Originally Posted by John K
The issue I think as well with SONY chips is that for the equivalent size probably double the cost?? e.g. QHY9 vs ATIK equivalent in a SONY (in terms of chip size) - although I should be more accurate and say in terms of the ATIK offering which then starts to use larger KODAK chips in the larger format cameras.
My Canon 400D provides a 47.9' x 32.0' field. I really don't want to go below about 40' x 30'
I can see why even though it's been around for a long time the KAF 8300 chip is so popular! and why perhaps the QHY9 is such good value.
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Yes, it's a shame the Sony chips that are available in astro cameras are relatively small. The KAF-8300 is good value because it was made in large volumes for non-astro applications and that pushed the price down.
Cheers,
Rick.