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INDI Library v1.9.0 Released (23 Apr 2021)

Major INDI Library release v1.9.0 bring significant internal changes championed by @pawel-soja to modernize core INDI Library drivers and clients. New drivers for DeepSkyDad Flat Panel & Pegasus devices plus further improvements to PCM8 drivers.

Focussing a DSLR camera

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Hey hey, still me... slowly getting the hang of it - but still very new to both astronomy and photography.

I am trying to understand what's the best way to put my DSLR camera (Canon EOS 2000D) into focus. At the moment I am using the telescope focus during the initial alignment to make sure the brightest stars I am using to align the telescope are in focus. Then, once Ekos is up and running I am trying the autofocus, but it keeps failing (saying it was unable to select a star automatically). In the Camera tab, if I take a pic with the same settings used for the focus (25", ISO1600), I can actually see a handful of bright stars - although slightly out of focus.

How do you make sure that the camera is focussing your target correctly?

Thanks!
2 months 2 weeks ago #69735

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Replied by Ferraro on topic Focussing a DSLR camera

To eliminate any issues due to starting focus point, you should start you first autofocus sequence with your best focus point (if you have a bahtinov mask use it to focus your system). Check your mechanics settings : initial step size and out step multiple to be sure that the first capture always show a few stars identified by the search star algorithm. To do that, after a good manual focus, move your focuser using (initial step * out step multiple) and take an image to verify star size and star detectivity.

Joe.
Mount : Avalon Fast Linear
FSQ 106 + Lakerside focuser
CCD : QHY290 MM Cool Guider : QHY5L-II
DSRL : Sony A7S Baader Mooded
2 months 2 weeks ago #69812

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What telescope are you using, what focuser do you have, or are you using a camera lens?  Without knowing your setup, it is impossible to give meaningful advice.

Jo
 
Atlas Pro AZ-EQ, ASI1600MM-Pro, ASI120MM-S, ES102ED, WO-Z61, Nikon D3300, ASI-EFW, ZWO LRGB,Ha,O3,S2 filter set
2 months 2 weeks ago #69822

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