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There are 2 download speeds on the Proline. The faster one is about 2 seconds. Its pretty fast.
45C cooling should be fine. -20C should be OK. I usually use the Proline at -35C. Lines etc fade with higher cooling but darks will remove them anyway.
That is a big price difference so I see what you mean.
The FLI filter wheel to me is overpriced, the camera is probably fair price.
I can't see the price in the filter wheel. Its a fairly simple item. The Apogee FW50 filter wheel is also about half the price of the FLI. Although their cutouts in the carousel were at one time causing dust swirl making flats not take out all dust donuts for some imaging in dusty areas. They may have corrected that now - that was a long time ago.
See if you can get a 10 mins -20C dark at 1x1 sent to you. I can post an equivalent one from the Proline. Darks show up a lot of the potential defects if any and the differences in noise from the electronics used.
Greg.
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