Cooling vs. non-cooling

frank14

I am considering the purchase of the Zwo 178 CCD. How important is it to purchase the version with cooling if my exposures are at a maximum of 1 minute? At 4 minutes? Will there be a lot of difference at 1 minute? At 4 minutes? Thanks for any help in this as I consider what to purchase. Frank.

riklaunim

There will be some difference at X minute exposures so it's better to have cooling. X seconds exposures could likely skip it. Also those new CMOS based cameras don't need very long exposures (like 4 minutes) in general.

Sam@ZWO

above is correct