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PHD2 building dark library

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#1 Waterobert

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Posted 08 November 2019 - 11:19 PM

Finally, I found some free time to play with my new acquisition laptop. I am done with downloading softwares and drivers, tomorrow I will test if all works. First I want to build dark library for my guide camera in PHD2. I don't remember how many frames to take for each exposure time. Would 10 be enough? More is probably better  



#2 AhBok

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Posted 08 November 2019 - 11:22 PM

5 is plenty.
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#3 wrnchhead

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Posted 09 November 2019 - 12:11 AM

Yeah and I don't think it's hyper-critical unless you have a really terrible camera. Your 290 would likely do perfectly fine running nothing. But obviously a good idea, and simple enough to do. 


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#4 OldManSky

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Posted 09 November 2019 - 10:45 AM

Yeah and I don't think it's hyper-critical unless you have a really terrible camera. Your 290 would likely do perfectly fine running nothing. But obviously a good idea, and simple enough to do. 

I used to use an Orion SSAG. It worked fine, but was quite noisy. I did 10 frames of darks, and that helped, but still pretty noisy.

When I switched to the 290mm mini, I tried guiding the first night before taking darks...with no darks it was cleaner than the SSAG with darks, by a mile! That was about 3 months ago. I still haven’t bothered to do darks. No hot pixels to confuse PHD, guiding at .4 - .5” every night...why bother with darks? :)


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#5 nimitz69

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Posted 09 November 2019 - 02:16 PM

same here.    I use the 120 mini but have never done any darks and PHD has no issues selecting guide stars


Edited by nimitz69, 09 November 2019 - 02:17 PM.


#6 AhBok

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Posted 09 November 2019 - 03:21 PM

I generally agree with the last two posts, but am curious about your climate. I use the 290mini and we have plenty of summer evenings that begin above 90f and never drop below 80f. I find darks help tame the noise during summer here in the midsouth.
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#7 wrnchhead

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Posted 09 November 2019 - 03:37 PM

Also, I want to clarify. I wasn't saying don't use darks, just that the exact amount of them you take isn't something to stress over too much. I use them and it was easy to do. 




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