Processing 30 minutes of Milky Way data gave me a white blob - here's what I missed

I stacked 120 frames from my DSLR and ended up with a bright white mess. Turns out I forgot to take flat frames and my sensor had dust spots ruining everything, plus my gain was WAY too high. Anyone else get blindsided by basic calibration steps their first time?

2 comments

2 Comments

nathan_torres3410d ago

Ngl I actually think you're overthinking this whole calibration thing. If your data is already a white blob, flats and darks aren't going to fix bad exposure, they just clean up dust and sensor noise. Honestly, get your gain right first and use a longer total exposure time, those basic steps matter way more than frame types. Tbh, a lot of folks waste hours on calibration frames when their actual capture settings are the real problem.

casey94310d ago

And actually I just read an article in Sky & Telescope that backed this up pretty well (the author was an old-school imager who switched to a lighter workflow). They ran a whole test comparing calibrated vs uncalibrated stacks and honestly, there was almost no difference unless you're chasing super faint stuff or dealing with obvious amp glow. Most of the time it's just a dust donut or two that you can fix with a flat later if you really want. I get that some people swear by a full calibration routine but for quick and dirty sessions, I'd rather spend that time gathering more total exposure instead.