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Quote:Here is a 5sec dark taken with PHD; looks the same to me.
Quote:That's the point. Now let PHD subtract those hot pixels on each frame it takes a frame for guiding. As long as you keep the same exposure length guiding that you did when you took your PHD dark frame PHD will use it and subtract it.
Canon 60Da/ 350D Mod
Orion 80ED/ ST80 SSAG & PHD
Various camera lenses
Quote:I know where the button is; I meant do I need to save in PHD and load the dark in PHD or does PHD saves it in cache?
Adam AP Mach 1, Rob Miller TRI36L, Celestron 8" Edge HD Hyperion 17mm, Celestron 40mm Plossl, TMB 7mm & 9mm WO 66, Lunt LS60/B1200 PT, CG-5 Clone STF-8300m Pro Package, Honis-Modified Canon XS, Un-modded T1i, SSAG, TSOAG9, SX LodestarLackawanna Astronomical SocietyMy Astrobin
Mach1GTO / G11/G2 (stock) / AT6RC / AT10RC / TMB92SS / Astrodon 50D / STT-8300M / FW8G-STT / PixInsight / etc, etc. Astrobin - Flickr
Celestron C-8 SCT
Gary Honis modified Canon 450D (Baeder Mod)
MonoMods monochrome Canon 450D (Debayered, Baader filter, LPF1 removed)
ONAG On-Axis Guider
Starlight Xpress Lodestar Autoguider
Canon EF 200mm f/2.8L II USM
Olympus Zuiko 50mm f/1.8
Quote:Thanks everyone for your feedback.I am using a 4" Orion APO as a guide scope. Below is 1sec light frame I took via PHD through the guide scope (Image is M35). Notice stars a oblong; and I am not sure what's causing it. It all can't be flexure because if you notice all of my darks had oblong hot/dead pixels. Anyway, PHD couldn't guide and kept alarming on decent mid-range stars in this field. I made sure I wasn't guiding on too bright or too dim stars. Long story short, first real test of this camera with this particular setup has been a failure. I do feel this particular camera has these oblong shaped hot/dead pixels which is odd; I would have expected some but not all defects to be oblong. Also notice, the image is hazy; I never could bring stars to crisper focus besides being oblong. Your suggestions/solutions are welcome before I send it back. Thanks again for all the help!Note: I have done quite a bit of guiding with this setup via SSAG 1.5 MP and never had a problem; stars have been crisp and round, although Lodestar shows more stars in a given field given the sensitivity/spec difference.Note: I have brightened image a bit for better visualization.
Quote:Is it possible that your alarming is coming from PHD picking up another star wandering into the guide box?
Quote:Mike - you don't want the stars to be sharp pinpoints - Phd can guide more accurately if the stars are a bit out of focus. Bu having the image out of focus, the light from a star is spread over many pixels. Phd uses this information to more accurately calculate the center of mass of the guide star. This allows Phd to do sub-pixel accuracy guiding. This is also why its not an issue if the guide star isn't round - Phd is only calculating the center of mass for the guidestar.
Quote: Maybe given the poor connector on the Lodestar, that has something to do with it.
"The White Zone is for loading or unloading of passengers only. No Astrophotography." Cosmic Acres! Greatest restoration challenge: Tulley and Sons 3" achromat on Altazimuth mount, circa ~late 1820s
Quote:I doubt there was anything wrong with the loadstar.
- Sergio - Canon 600D/T3i (Baader)(Peltier Cooled) LX200 10" ACF @ F8 (CCDT67)OTA NEQ-6 Pro (Belt Modded) + EQMOD TSOAG-9 Guider SX Lodestar + PHD2