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Impossible to see stars
Posted: Mon Oct 02, 2023 4:48 pm
by elingeniero
Good afternoon. Yesterday I tried to align with Sharpap using an OAG but it was impossible. The problem is that there were not enough stars in sharpcap, but there were in phd or NINA. I raised the gain and exposure time but nothing, not even with the main camera. During the day you can see the images. I haven't touched anything, what's wrong?
Thank you
Re: Impossible to see stars
Posted: Tue Oct 03, 2023 12:58 pm
by admin
Hi,
how far did you go with the exposure time? For seeing stars a good starting point is 2s exposure, medium to high gain. Using an OAG you might need longer exposures as the amount of light reaching the sensor can be low due to the size of the prism.
cheers,
Robin
Re: Impossible to see stars
Posted: Tue Oct 03, 2023 1:58 pm
by elingeniero
I went up to almost 4". The strange thing is that in phd, they looked perfectly at 1".
To give you more information. I use (this is the second time I've done it) an oag zwo, with a TS80 tube (384mm - f4.8).
All the best
Re: Impossible to see stars
Posted: Wed Oct 04, 2023 12:08 pm
by admin
Hi,
ok, the next thing to check is that you have not adjusted some other setting in SharpCap that is causing the issue. If you hold down the <CTRL> key while opening the camera, Sharpcap will not re-load previous settings, meaning that everything will go back to default. You can then set 4 second exposure and high gain and see if that helps.
cheers,
Robin