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starpusher

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About starpusher

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    Nebula

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  • Location
    Lancashire
  1. Thanks. That's helped. I didn't know what to look for. I've used the paddle function to improve the blue and red alignment and the blotching has reduced ; but will have to figure out the rotation alignment. I can't work out what to do with the green yet.
  2. I used Iris for the Black and White master frames (Iris tutorial 10) to produce the master frames for each of the channels and these looked fine. I then tried Iris using the LRGB technique (Iris tutorial 23) and the image has come out with the blotchy colours. If anyone could suggest why this is I would appreciate it. This is the first time I have tried to produce a colour image. I used a Brightstar Mammut camera (Black and White) attached to my 80mm refractor.
  3. Thanks for your replies. The capture software is Night Watch Studio which came with the camera. I seem to remember the ADU is plotted or presented somewhere in there. I will have a look. Richard
  4. Can anyone give me a tip on how to optimise the saturation level for taking flats please? I will be using an Earlsmann EL panel mounted on to the end of the scope - 80mm (f600) Skywatcher refractor. The camera is a CCD Brightstar Mammut L429 (16 bit) mounted to the scope. I have been trying to use IRIS for processing although I have not successfully tried flat images yet and have only just bought the EL panel. The lady at Earlsmann said I could use sheets of white paper between the panel and the scope if the image is too bright but I don’t really know how to decide if it is too bright. Thanks, Richard
  5. sorry "levels" should read "layer". This works with a jpeg e.g. layer...new adjustment layer...levels. Regards, Richard
  6. Glen, Thanks...One thing I have found is that I can't seem to operate the levels function on a tiff file. Have you found this? Regards, Richard
  7. Does anyone have any recommendations for a book or web link on astro image processing using Photoshop please? I have Photoshop 7. Thanks, Richard
  8. Starblazer- I aligned it with the polar scope i.e. aligning Polaris in the little circle and angled the mount with the plough / Cassiopeia but I didn't drift align so I suppose it should be good enough but maybe not perfect. Cloudwacher.... that's great, I certainly don't mind do you do lessons? I'll have to have a play around in Photoshop and come back with questions. Thanks to you all for the help and comments, Regards, Richard
  9. Thanks kookoo snd Dave. The guiding was good and it is an eq6 mount, so I reckon the polar alignment was reasonably good. I think I did try without the dark images but from memory it worsened the effects...but I'll look at that again. I'll look harder at the post processing and the nebulosity 2 and see what I get. Regards, Richard
  10. Please can anyone give me an idea of what I have done wrong here? This is my first serious attempt of stacking multiple images. I have had attempts in the past stacking three or four 3 or 4 minute exposures but the DSO didn’t show too well. This one is Pacman with ten stacked 5 minute exposures and the same number and exposure time for the dark exposures all stacked with Deep Sky Stacker. I did not include any flat exposures. Phd guided using a QHY5 camera with a f400mm 80mm refractor piggy backed; imaged with a f1000mm Skywatcher 200mm Newtonian and a Canon EOS 300 DSLR, set at ISO 400. I used Photoshop to process. What I can’t figure out is why there is a large illuminated area on the left of the image and again the DSO isn’t too prominent. The imaging was done in the early hours a few weeks ago and Cassiopea was high in the sky, good conditions and no artificial lighting or other significant light pollution. I did use a CLS filter. I don’t profess to be any sort expert on this, with DSS, Photoshop etc so any tips or pointers would be appreciated. My DSLR camera has not been converted. Thanks, Richard
  11. Luke, I think I have still got some of the PHD files on the laptop computer... will check. Gives dx, dy and other things from memory. Regards, Richard
  12. It calibrates with about 7 to 20 steps depending on the step size that I define. The backlash steps are small...less then 6. Can't remember getting any warnings or error messages...and then it says "Guiding". I have never tried manual in PHD it didn't know I could!
  13. Nigel, Does this mean that it is oscillating from one side of the star to the other? My "error" just seems to be on one side, unless I guide it and then sometimes it moves to the other side of the star. Did you plot the sine wave? Regards, Richard
  14. Thanks for your offer Luke but I am about 200 miles from you in Lancashire
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