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Adreneline

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About Adreneline

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    Derby
  1. Hi. I had a very similar experience using a Huion Adjustable Lightness 17.7 Inch (Diagonal) LED Animation/Artcraft/Tatoo/Quilting/Tracing Light Box - A4 - purchased from Amazon (I use it for macro photography of transparencies and negatives and works really well - and no, I'm not a secret tattoo artist!). In the end I gave up trying to use it to create flats with my Atik 414ex and just went for the uniform gray sky day (plenty of those round here) and a white teeshirt over the end of the scope - which gave what I thought were very good results. Adrian
  2. Hi Alexxx My Atik 414ex is a osc camera so there is no L! I stumbled across the facility in Dawn to save the individual channels from the rgb image so I thought I would give it a go, just to see if there was a benefit in manipulating the individual channels before combining them again. On this occasion I found I got a better a result with relatively little PS processing, but with M82-M81 (my first post on SGL) I found the rgb image was relatively straight forward to process in PS - although far from perfect it was to me an acceptable result. I searched SGL to see if anyone else had used Dawn in this way but didn't find anything; indeed Dawn doesn't seem to get a very good following - I guess you could say it has a somewhat orthogonal approach to image processing. DSS can give variable results although on the whole I get on well using it for registration and calibration. With my limited experience I have found it generally seems to work best with lots of longish subs. I would be delighted if you want to have a go at my subs and calibration frames to see what you produce. I am barely on the learning curve let alone progressing up it! I can copy them up to Dropbox and post a link - probably tomorrow (Tuesday). Thank you again. Adrian SW80ED DS Pro, 0.85 f/r, NEQ6, Atik 414ex osc, IR/UV filter Sequence Generator Pro, CdC, EQ Suite, DeepSkyStacker, Photoshop CS6, Atik Dawn
  3. Hi Alexxx Thank you for your comments. I only managed to take 16x300s subs before the clouds rolled in, so no where near enough really. I can't understand why I was having so many problems getting a half decent result from the usual approach of calibrating and registering in DSS and then going straight into PS to complete the processing. That was why I decided to deconstruct the subs in Dawn and process them separately before combining in PS. I'm sure it would have been better still with a separate luminance layer; I'll have to have a go at creating one from the rgb. I use SGP to focus; it uses multiple targets to achieve a best result. I have checked it with a mask and it seems to confirm that all is well but the end result is still a little soft. I did notice when processing the individual deconstructed channels that the red image appeared to be not as sharp as the green and blue. Maybe I should try some deconvolution on that one component. I don't recommend deconstructing unless it is pouring with rain outside - there have to be better things to do with your life
  4. I decided to have a play with Atik Dawn using just 16 lights of M101. I had tried the usual DSS route along with 50 off Bias/Dark/Flats but was really struggling to get what I considered to be a half acceptable end result in PS. Just for the hell of it I decided to deconstruct the original lights in Dawn, taking each of the lights, bias, dark and flat files, debayering and saving the separate red, green and blue channels. I then used DSS to calibrate and register the individual channels to obtain 'master' red, green and blue channel images. I then used RGB Combine from the Carboni Actions in PS to bring it all together and with a bit of processing obtained this image. I'm sure I have a focus problem (I'm working on it!) and I have no idea whether the colours are correct but it was an interesting exercise that has produced a better result than processing the original osc image in PS. As usual any constructive comments would be appreciated. Adrian SW80ED DS Pro, 0.85 f/r, NEQ6, Atik 414ex osc, IR/UV filter Sequence Generator Pro, CdC, EQ Suite, DeepSkyStacker, Photoshop CS6, Atik Dawn
  5. Thank you again for the comments. I went with 120s because I had already tried 180, 240 and 300 and found the centre of M82 would tend to be over exposed and lack detail/structure. I've taken Olly's advice and sampled the background in the tif file in four areas of the image background and it comes out at 22/23/20 RGB so I'm in the right ball park I think. I should have mentioned I also used the Topaz DeNoise plugin in PS. Finally I took the 100 dpi image which results from the 414ex and increased it to 300 dpi without changing the image dimension. That's probably cheating but it seemed to help smooth the final image quite a bit - to my eyes! Thank you again for all the helpful comments.
  6. Thank you again for the kind comments and suggestions. I thought long and hard about a mono 414ex but decided I would make a go of the osc. Clear skies are rare around here and light pollution is a problem until after midnight when many streets lights are turned off; even then I can really only image N-thru-E-to-S. Dithering has markedly improved the background noise problem. Colour balance is a challenge; I get different results from the PC to the MacBook to the iMac - in the end I go with what I like the look of! Perfecting my skills in PS is clearly the name of the game so I'll be trying to better understand the benefits of masks next I think. I'm inclined to leave the hardware exactly as is for now as it took me an age to get everything spaced correctly and even now it would seem I still have an issue with focus which thus far I have left to SGP to handle. Adrian
  7. Thank you Mike and Steve for your comments. It seems that every aspect of this hobby represents a challenge so I am delighted to receive your positive feedback. I've read my copy of MEPC so many times over the past four months it has literally fallen apart from the binding. Clear nights are few and far between in the East Midlands hence my decision to go for osc, but at least I get plenty of time to try to perfect my PS skills. One of my biggest challenges has been creating a 'useful' luminosity layer from the original rgb image. Once I've succeeded I'll share my M63, M101 and M51 images. Thank you again.
  8. I obtained my first telescope (ED80DS Pro with NEQ6) in October 2016 and experimented with some success with an unmodified 70D, slowly getting to grips with EQ-suite, CdC, DeepSkyStacker and BackyardEoS whilst taking a large number of varying quality images of M31, M33 and M42. In November I bought an Atik 414ex osc and have been on a real journey of discovery. Having finally got to grips with PHD guiding, Sequence Generator Pro and dithering, and spent hours experimenting with Photoshop and various pieces of trial image processing software here is my first result that I feel reasonably satisfied with. To the expert eye I am sure it has a wealth of shortcomings so any constructive comments would be very much appreciated. The image comprises 62x120s high-dither lights with fifty darks, flats and bias frames (all at -10 degrees C), and what feels like 2x62 hours of time spent processing! I will take this opportunity to thank so many on this forum who have unknowingly helped me make progress over the past four months. I have read many, many posts on a vast range of topics and learnt more than my brain could cope with. Thank you to all for sharing so much. Equipment: ED80DS Pro with 0.85 f/r, focussing unit and USB interface, NEQ6, IR/UV filter, Atik 414ex osc Software: Sequence Generator Pro, Cdc, EQ Suite, DeepSkyStacker, Photoshop CS6