Anthonyexmouth Posted August 6, 2018 Author Share Posted August 6, 2018 Now, PA with sharpcap gets me here before any adjustments to drift align. Why do you think PHD polar align thinks im so far off? Link to comment Share on other sites More sharing options...
david_taurus83 Posted August 6, 2018 Share Posted August 6, 2018 That doesn't look too as a starting point Link to comment Share on other sites More sharing options...
Anthonyexmouth Posted August 6, 2018 Author Share Posted August 6, 2018 2 minutes ago, david_taurus83 said: That doesn't look too as a starting point the purple circle is inside the green box, its tiny, i thought thats what i was aiming for. just noticed you didnt say whether its good or bad as a starting point Link to comment Share on other sites More sharing options...
david_taurus83 Posted August 6, 2018 Share Posted August 6, 2018 Doesn't look too bad! When I last tried drift align it wasn't that close! Link to comment Share on other sites More sharing options...
Anthonyexmouth Posted August 6, 2018 Author Share Posted August 6, 2018 thats where sharpcap got me, alt is a little off at -9 but adjusting that now, bloody tricky with the standard bolts Link to comment Share on other sites More sharing options...
Thalestris24 Posted August 6, 2018 Share Posted August 6, 2018 I've never used it but I think you only use the polar drift align tool to get a rough PA Link to comment Share on other sites More sharing options...
Anthonyexmouth Posted August 6, 2018 Author Share Posted August 6, 2018 1 minute ago, Thalestris24 said: I've never used it but I think you only use the polar drift align tool to get a rough PA i wont be using it any more Link to comment Share on other sites More sharing options...
michael8554 Posted August 6, 2018 Share Posted August 6, 2018 PHD2 Polar Align quickly gets you roughly right after setup. PHD2 Static Polar A!ign gets you to about 5 arc mins. That's good enough to guide on, particularly if you have a lot of Dec backlash, you can then guide in one direction only. If you want better than that, PHD2 Drift Align. Michael Link to comment Share on other sites More sharing options...
Thalestris24 Posted August 6, 2018 Share Posted August 6, 2018 The only tool I've used is the 'Drift Align' one - the others just seem to add confusion - they should have given them different names! I think the 'Polar drift align' tool only works if you point the guide scope at or near Polaris whereas the proper drift align only works if you point due south for az then either due east or west for alt. Link to comment Share on other sites More sharing options...
Anthonyexmouth Posted August 6, 2018 Author Share Posted August 6, 2018 my latest graph and a 10min sub of M13 Link to comment Share on other sites More sharing options...
Anthonyexmouth Posted August 6, 2018 Author Share Posted August 6, 2018 34 minutes ago, Thalestris24 said: The only tool I've used is the 'Drift Align' one - the others just seem to add confusion - they should have given them different names! I think the 'Polar drift align' tool only works if you point the guide scope at or near Polaris whereas the proper drift align only works if you point due south for az then either due east or west for alt. think im gonna stick to sharpcap for polar align then PHD for drift align. Link to comment Share on other sites More sharing options...
Thalestris24 Posted August 6, 2018 Share Posted August 6, 2018 2 minutes ago, Anthonyexmouth said: my latest graph and a 10min sub of M13 Pretty good! I suspect you don't have a field flattener/reducer? Link to comment Share on other sites More sharing options...
Anthonyexmouth Posted August 6, 2018 Author Share Posted August 6, 2018 not yet, thats next on the shopping list Link to comment Share on other sites More sharing options...
kens Posted August 7, 2018 Share Posted August 7, 2018 6 hours ago, Anthonyexmouth said: This is PHD2 polar drift moments later, same mount, scope and cam. Can you send me your debug log? PDA is not as accurate as other methods but it should not be that far out. You can use the help menu option to upload to PHD support and I’ll have a look at it there Link to comment Share on other sites More sharing options...
jjosefsen Posted August 10, 2018 Share Posted August 10, 2018 On 07/08/2018 at 05:13, kens said: Can you send me your debug log? PDA is not as accurate as other methods but it should not be that far out. You can use the help menu option to upload to PHD support and I’ll have a look at it there Fwiw Kens i used PDA for PA on my last session, and it resulted in 0.6" - 0.7" guiding, and i damn near cried (tears of happiness though)! ? I really should learn to drift align though... Link to comment Share on other sites More sharing options...
Stub Mandrel Posted August 10, 2018 Share Posted August 10, 2018 I saw a big improvement in guiding by trying out different algorithms. Link to comment Share on other sites More sharing options...
jjosefsen Posted August 10, 2018 Share Posted August 10, 2018 5 hours ago, Stub Mandrel said: I saw a big improvement in guiding by trying out different algorithms. What is your typical RMS and what algorithms did you try? Link to comment Share on other sites More sharing options...
Stub Mandrel Posted August 10, 2018 Share Posted August 10, 2018 I got it down to 0.6" last time, using LowPass. I tried Lowpass2 on DEC and it was useless, kept losing the plot. Before I have used resistswitch and hysteresis and not been able to get below 0.7, often worse. Here's a single frame (jpeg). Sensor was a bit grubby, I'm afraid. It's a random choice and been stretched but no other processing. Edit: why is it that a single frame with minimal adjustment can look almost as good as my stacked an processed version? Link to comment Share on other sites More sharing options...
jjosefsen Posted August 10, 2018 Share Posted August 10, 2018 There should be significant improvement in your stack, although I don't know how many frames or sub length. Could be software related too.. Link to comment Share on other sites More sharing options...
Anthonyexmouth Posted August 10, 2018 Author Share Posted August 10, 2018 Well i'm happy with this, considering its only PA with Sharpcap. The bump at the end is me walking next to the mount. Link to comment Share on other sites More sharing options...
Thalestris24 Posted August 11, 2018 Share Posted August 11, 2018 12 hours ago, Stub Mandrel said: Here's a single frame (jpeg). Sensor was a bit grubby, I'm afraid. It's a random choice and been stretched but no other processing. Edit: why is it that a single frame with minimal adjustment can look almost as good as my stacked an processed version? Hiya Could be lucky imaging or it could be you're not stacking enough subs. See 'How to create better images' in the Deepskystacker help. Louise Link to comment Share on other sites More sharing options...
Stub Mandrel Posted August 11, 2018 Share Posted August 11, 2018 56 minutes ago, Thalestris24 said: Could be lucky imaging or it could be you're not stacking enough subs. See 'How to create better images' in the Deepskystacker help. It's not a stacking issue, it's just that i struggle to get that colour, my nebulosity suffers the 'curse of pink'. Link to comment Share on other sites More sharing options...
Thalestris24 Posted August 11, 2018 Share Posted August 11, 2018 1 hour ago, Stub Mandrel said: It's not a stacking issue, it's just that i struggle to get that colour, my nebulosity suffers the 'curse of pink'. That just sounds like a histogram adjustment issue, Neil. If stacking in dss you usually need to adjust saturation and save the image. Then it's usually just a matter of tweaking the levels/curves in your favourite image editor. Louise Link to comment Share on other sites More sharing options...
Stub Mandrel Posted August 11, 2018 Share Posted August 11, 2018 44 minutes ago, Thalestris24 said: If stacking in dss you usually need to adjust saturation and save the image. More subtle than that, I've tried dozens if not hundr4eds of approaches, I just can't get the 'rich red' without making things look artificial. This si probably eth bet I'v managed so far, bit still looks like its behind a sheet of tracing paper. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.