Had a few hours tonight outside just practising and learning to use the software with my QHY. Polar alignment wasn’t that great but I was having some errors with the program.
Increase your exposure time ( try 2 -3 seconds to start), this can typically improve SNR and thus prevent lost star. Of course a cloud moving over your guide star can cause star lost due to poor SNR. Aim to keep the SNR letters green at the bottom of the frame. Of course guide camera sensitivity plays a role as well.
I probably should have mentioned some numbers from my guiding!
- SNR was around the 30 mark. I tried another section of the sky with another star and at one point it was 8
- Exposure I think was 1 second
- I did both a manual and automatic star
I had similar problems to start of with. I found that better focusing helped a lot and enabling noise reduction in PHD2 also improved things with my zwo120mc camera. Advanced settings (the brain icon), camera, noise reduction.
I had similar problems to start of with. I found that better focusing helped a lot and enabling noise reduction in PHD2 also improved things with my zwo120mc camera. Advanced settings (the brain icon), camera, noise reduction.
Yeah focusing was the hardest bit as you have to move the entire camera back and forward and the refresh rate isn't quick enough.
I will give it another crack tonight if the weather permits!
I was at the point you are a month ago..things starting to work and sorting out the problems ...then the weather went sour and I missed the only good nights available to run the gear since then (nights where there was little cloud)...and now because I replaced the tripod with a pier cant now get back polar... and the dec is still sloppy... but I will give PHD a go ..I hope it is the answer to the tree cover here... same problem as you here... Michael from Bintel up here said the best bit of astro gear he could recomend was a chain saw...
Yeah focusing was the hardest bit as you have to move the entire camera back and forward and the refresh rate isn't quick enough.
Focus on a bright star with a quick refresh rate. Have the Star Profile enabled so you can see the HFD/FWHM and have a zoomed in view of the star.
Then move to your target.
I personal found focusing my ASI120MM-S and a guide scope in PHD a pain. I would use another software package to focus (I used MaximDL because I've got it but SharpCap would be good and free).
Following the SNR and FWHM numbers in PHD I'd think that I'm close to focus and then I'd check in MaximDL and it would be way off. PHD does an excellent job at dealing with out of focus stars and centroid calculations. It is because it does what it is supposed to do well that makes focusing a bit difficult.
