Popular Post Dmack1 Posted April 20, 2021 Popular Post Share Posted April 20, 2021 (edited) Having read that some of the newer FF/FR's do a reasonable job with older SCT's I decided to give the old 8" LX200 a try with my SW 80ED 0.85 reducer/flattener - my thinking was that it could not be any worse than the coma I get from my 0.63 Meade 4000 FF/FR. I stuck the ASI2600mc on it not really expecting much but this is what I got.... 8" LX200 GPS on a wedge, SW 0.85 FF/FR, ASI 2600mc, 120 x 120s Bin 2 x2 Now this is a bit of a crop but only really for edges and framing but the fact is that the really ugly U-shaped stars which, on the 0.65s start half way out and are horrendous by the corners, are largely gone. Who'd have thought! Still a little bit mis-shaped out at the corners but I think another mm or so on backspace will sort that. At 0.85 the LX200 should be coming in at 1700mm FL but platesolving is calling it 1976mm ?? I binned this 2x2 in camera but have since read that with the ASI2600mc the recommendation is not to Bin in camera but rather do it in processing. Would anyone have any advice on that and how/when to do it in APP/PI C & C appreciated. Edited April 20, 2021 by Dmack1 12 Quote Link to comment Share on other sites More sharing options...
Padraic M Posted April 20, 2021 Share Posted April 20, 2021 Lovely image. Lovely core bulge and great detail in the clouds. Will be interested in the answer to your binning question too. As I understand it, the CMOS cameras don't bin in the sensor, they bin after reading out the pixel values, so you don't get a noise benefit like you would with a CCD. The only benefit is a smaller file to transfer from the camera, so in that case you might as well defer the binning until later. I always process at full resolution and scale the image towards the end, but all of the Startools tutorials I've watched recommend binning as step 1. Did you decide to bin based on your pixel scale? I presume you're around 0.5"/px? Quote Link to comment Share on other sites More sharing options...
Dmack1 Posted April 20, 2021 Author Share Posted April 20, 2021 Thanks Padraic. Yes thats what I was thinking too but i dont really understand all that signal processing tech speak!! what I'm wondering is if I want to bin in, say, PI, how exactly do I go about it and am i going to gain any SNR improvement? If not then there does not seem much point. Yes - the platesolve readout in APT was saying 0.48"/pixel and with Irish seeing that really seemed a bit pointless. 1 Quote Link to comment Share on other sites More sharing options...
AstronomyUkraine Posted April 20, 2021 Share Posted April 20, 2021 19 minutes ago, Dmack1 said: Yes thats what I was thinking too but i dont really understand all that signal processing tech speak!! what I'm wondering is if I want to bin in, say, PI, how exactly do I go about it and am i going to gain any SNR improvement? If not then there does not seem much point. Very nice image. Some great detail. This is what you will need to bin the images in Pixinsight. I have never used it, as I don't need to bin my images. https://pixinsight.com/doc/tools/IntegerResample/IntegerResample.html Brian 1 Quote Link to comment Share on other sites More sharing options...
PeterBolt Posted April 20, 2021 Share Posted April 20, 2021 Wow that's stunning, I love the detail👍 1 Quote Link to comment Share on other sites More sharing options...
Dmack1 Posted April 20, 2021 Author Share Posted April 20, 2021 56 minutes ago, AstronomyUkraine said: Very nice image. Some great detail. This is what you will need to bin the images in Pixinsight. I have never used it, as I don't need to bin my images. https://pixinsight.com/doc/tools/IntegerResample/IntegerResample.html Brian Thanks for that Brian. I hope to get some more data this week so I'll give it a go. Quote Link to comment Share on other sites More sharing options...
Padraic M Posted April 20, 2021 Share Posted April 20, 2021 Interesting forum post form Mabula on binning in APP: https://www.astropixelprocessor.com/community/tutorials-workflows/does-app-support-software-binning-of-osc-color-images/#post-10206 1 Quote Link to comment Share on other sites More sharing options...
Wyvern Posted April 21, 2021 Share Posted April 21, 2021 Fantastic Image! and very well processed. 1 Quote Link to comment Share on other sites More sharing options...
paulgrover68 Posted April 21, 2021 Share Posted April 21, 2021 Very nice. Amazing detal. 1 Quote Link to comment Share on other sites More sharing options...
Bob-c Posted April 21, 2021 Share Posted April 21, 2021 Very nice,well done. Bob. 1 Quote Link to comment Share on other sites More sharing options...
MarkAR Posted April 25, 2021 Share Posted April 25, 2021 Looks great. 👍 1 Quote Link to comment Share on other sites More sharing options...
MartinS Posted April 28, 2021 Share Posted April 28, 2021 Great looking image, your combination works well. Nice option for Galaxy season. 1 Quote Link to comment Share on other sites More sharing options...
paul Posted April 28, 2021 Share Posted April 28, 2021 Lovely high resolution detail, processed well.👍 1 Quote Link to comment Share on other sites More sharing options...
peter shah Posted April 29, 2021 Share Posted April 29, 2021 really like your process on this. Your balance of colour and detail is lovely 1 Quote Link to comment Share on other sites More sharing options...
Gina Posted June 19, 2021 Share Posted June 19, 2021 Superb. 👍👍👍 Quote Link to comment Share on other sites More sharing options...
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