Televue 85/TRF-2008 field flattener, Meade LX200 10", Manfrotto 055SSB tripod/410 geared head/AstroTrac TT320X-AG/056 3D head, GM-8/Gemini, 10 Micron 1000 HPS, Canon 40D (unmodded), Canon 450D (modded w/Astronomiks clip-ins - UV/IR, OWB), Coronado SM60/Lunt B1200/WO diagonal, Baader Herschel Wedge Leeds Sky Clock Ripon Sky Clock
Robert The more I learn, The more there is to learn! Orange Zone Dark Site 3 Mounts 4 Imaging Cameras 3 Guide Cameras OTA's = yes
Quote:This is indeed AV mode. The histogram is very close to 0.0 peak in GIMP. I will attempt some with no lens.
Quote:I'm trying to get some better flats, and I have an odd result no matter what I try. With my 50mm lens, I've used t-shirt method with overcast sky, double white paper, white LCD computer screen and t-shirt, computer screen and paper. But, I always get these strange vertical "ripples". Initially I thought the t-shrits had wrinkles, hence the paper tests. But I get the same result.I've looked at other people's flats, and do not see anything quite like it. Is there some kind of issue with my method, or maybe the camera? Thought this was a bit strange...Here is low quality jpg of one that I quickly stretched.
Quote:The ellipse was because I have no way to evenly expose a flat with no lens. It's snowing outside, so I covered it with paper and fired away at the computer screen.
Mach1GTO / G11/G2 (stock) / AT6RC / AT10RC / TMB92SS / Astrodon 50D / STT-8300M / FW8G-STT / PixInsight / etc, etc. Astrobin - Flickr
Scopes: Meade SN6, 10" Dob, Meade LS6, 5" reflector, 8" reflector, 102GT
Mounts: LXD75 and LXD55
Camera: SBIG 8300M, Baader 7nm Ha, OIII, SII, LRGB
Modded C9.25, Vixen SP retrofitted with DS motors and Autostar My pics
Stars light the world without, to give us purpose
They light us within to give us reason
We live in a well-lit abyss.