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Old 11-06-2016, 10:30 AM
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codemonkey (Lee)
Lee "Wormsy" Borsboom

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Join Date: Jul 2013
Location: Kilcoy, QLD
Posts: 2,055
Here's a couple of dodgy flats (pointed at my ceiling with no OTA connected) demonstrating the vignetting with 1.25" filters with the camera connected directly to the Orion Nautlius 7x1.25" EFW.

The vignetting itself isn't so bad. The filters are clearly not centered, but the main issue is that it's inconsistent. Between the two frames I rotated the filter wheel to another filter, then back to the original. This will make taking flats annoying.

Previously with the 674 and 1.25" filters I was able to take flats maybe every two weeks or so and then use them across all the filters. Now, for proper correction, I'd need to take them every time I change filters, even if I change it back to the one the flats were taken with.
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