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robindurant

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Everything posted by robindurant

  1. Hi again, is the tilt problem causing the larger stars on the left, whch way should I adust the tilt on my Redcap
  2. Has anyone an idea as to what these poor edges to my image is, Its not fully pocessed to show them. Im using a Redcat 51 with a Canon Full Frame 5DMk2 . I have a LP filter installed in the Camera CRAP IMAGE.tif
  3. My Canon 5Dmk11 vignettes badly, even when ep viewing, on my MAK137 and not so bad on my WPO Z71, is it possible to fit a Focal Reducer, if one is made for a DSLR to help this problem ? or am I stuck with it, I dont have a problem with my other DSLR cropped sensor 700D, this is the view
  4. Any ideas what these black speck are, I used my WO z71 + ZWO Asi 2m iso 800 Not proceeded fully to show marks
  5. This is the image. over exposed to show problem
  6. I have acquired a Canon 5D MK 2 which vignettes badly when attached to my Telescopes, WO Z71 & SW 5” Mak I have tried an adjustable field flattener to no effect , I processed 20 subs last night and same darks, the result was rubbish
  7. Hi single shots even at 30 secs are OK and Ive checked and cleaned all the optics
  8. I have attached 2 images from last night using an H-Apha filter due to the Moon being up, however the target was well away from it and should according to the Filter specifacation not effect Ha imaging. I reduced the exposure to 60 seconds as suggested by many and set iso at 3200 ( grainy but a good setting for accenting the problem) 10 and 5 exposures, stacked them with Deepskystacker, part processed on PS . As you will see it has made no difference whatsoever to the rotating marking or smearing effect I have checked the optics in the Scope and the DSLR Could this be a camera
  9. No Im in a situation where I can only veiw from SE - SW but have produced reasonable images, this is new
  10. Can you dither manually without software, say with your hanhset while exposing , if so how, thanks
  11. Thanks chaps for your help. The Horsehead target was only 45 degrees and I have just processed some images taken last night using iso 1600 and 90 seconds again at the Horsehead and the images have the same rotation problem. I have tuned this mount and it does now produce good images at 90 seconds iso 1600 at even higher altitude than 45 degrees, the attached image is at those settings
  12. Thanks for replying. I know that AltAz mounts are prone to this rotation, however the stars are not elongated and using DeepSkyStacker this should handle this small amount of rotation that these 6 frames developed or maybe not
  13. Can anyonetell me what is causing this circuling, Im using a WO Z71 on a iOpton AZ Goto mount 3mins @iso 3200 , high I know but for testing. I have a Flattener fitted which is variable but have set it at 71. I have attached 2 images stretched to show the problem. the object was at appox 45 degrees altitude, low Moon well away from the Horsehead, the first image was with a Ha filter and the other without any. I know a alt az mount is not ideal for imaging but I have had reasonable results before
  14. I've emailed Altair Astro but still waiting for an answer and now have contacted iOptron support and again waiting, meanwhile my warranty expiration gets nearer !!
  15. Can anyone tell me where I can download a "Strip down" or repair manual or instructions for this Mount, I have a knocking noise on slewing and need to inspect it
  16. I have tried altering the balance as Sub Dwarf suggested and Davey-T I am using a newly replaced unit as the previous one was worse - Demon[erformer, I put the wrong image on but it shows that the trails differ in direction when alter the weight/ balance etc . I will look up the link.
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