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beka

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About beka

  • Rank
    Star Forming

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  • Gender
    Male
  • Interests
    Besides astronomy, all science, computers
  • Location
    Ethiopia
  1. Hi Silent Running, no I didn't get the field derotator. So far I have just taken short up to 30 second exposures and stacked them with the software doing the derotation. I would like to hear from someone who as experience with the device to know how practical and easy it will be to use. Best
  2. Hi Silent Running, no I didn't get the field derotator. So far I have just taken short up to 30 second exposures and stacked them with the software doing the derotation. I would like to hear from someone who as experience with the device to know how practical and easy it will be to use. Best Meant to quote Silent Running's post...
  3. Well now I can see that while the colors on my laptop are faded as compared to my Samsung phone, they actually do appear pink here as well. I adjusted the color curves with Gimp and I think they are improved.
  4. O Yes same on my phone, but it did not seem so on my laptop. I will try to improve them.
  5. I played with the curves for Saturn a little in Gimp to bring out the cloud bands. I think the Encke gap is not a processing artifact - I believe that I had seen it visually at 400X some time back. Best!
  6. Hi All, I took the following images of Jupiter and Saturn with my CPC 1100 scope and my NexImage planetary imager (old no. 93712 640 x 480 model). Seeing was generally bad with the planet dancing all over the place but there were brief sharp moments. I took about 10000 frames at 15 fps. using oacapture. When I first tried to stack using AS!3 (AutoStakkert 3) using Wine on Linux, I found that it would not open compressed AVI files so after some Google searches and reading through forums, I found that I could use ffmpeg to convert the AVI file to a series of jpg images. Unfortunately AS!3 crashed when I tried opening maybe 100 or so images, but I later found I could convert the compressed AVI to uncompressed AVI which it opened and stacked (with basically just the default settings and about 25% of the frames) without problems, I deconvoluted with rawtherapee ,and finally used the unsharp mask of Gimp a little. While I am not unhappy with the results I think I could have done better had I used my Bahtinov mask for focusing and initially captured to an uncompressed AVI. Thanks for looking!
  7. Deciding to take another crack at planetary imaging since my last and only attempt about 7 years ago, I started setting up my CPC 1100 on the 5th floor deck of a childhood friends hospital building. He helped me carry it up a couple of flights of stairs and to place the OTA assembly on the tripod. While he curiously looked at his reflection through the corrector plate, worrying me with the prospect of a nose print, I collected the accessories I needed to start the imaging session. My friend who was in the meantime fumbling around with something on the deck, found a signboard thing which he happily declared would be his next canvas (he paints on all kinds of things) and went downstairs leaving me alone with the scope. I soon found that the power extension cord was too short and would not allow me to connect the power adapter - so I did a very foolish thing. I tried to lift the scope tripod on all supported by my body and decided it was doable. I slowly moved along the deck to place the scope nearer the power outlet... and then disaster! The azimuth clutch being loose, the OTA swung around and hit me on my left brow. I staggered thinking that was the end of my telescope but I somehow managed to maintain my balance and placed the scope down safely. I put my hand to the place where I had been struck by the OTA and it came away bloody. Looking in a mirror I was alarmed to see the left side of my face covered in blood. I washed my face and saw that luckily I just had a tiny superficial cut just below my left brow. I pressed some tissue to it and it stopped bleeding in a few minutes, and I continued setting up and imaging for a couple of hours. Recently someone asked on this forum about how manageable a CPC 1100 was to handle and I posted that I managed to set it up alone which was the case most of the time, but I have to admit it is was not the best advice. In the end I was not unhappy with the results which I will post in the imaging section. Thanks for reading!
  8. Hi NovaeSci, I am enrolled currently in the UCLAN BSc course. I would agree that it is excellent and challenging (the latter maybe because I am a MD). I can't say how well it will prepare you for the MSc and PhD levels. Regarding math you will need something a bit more than IGCSE level - some basic calculus is required even for the level one courses. If you wish to get the degree in a reasonable time you will need to do two or three courses a year. Part time I have found two courses a year my limit. Best
  9. Hi George Jones, I am of similar height and weight to yourself and 52 years old. I just about manage to assemble the CPC 1100 on my own. I keep it on the tripod in the house, to use it I take the OTA assembly off the tripod and place it on a waist high table. Then take the tripod out, then come back in for the OTA assembly. It is fiddly placing the OTA back on the tripod outside but manageable. Best
  10. Hi Tharsus55, You need an Celestron SCT T-Adapter and a Canon T-Ring or equivalents. You will not need spacers or extentions. If you don't already have it a Focal Reducer/Field Flattener would be useful. Best
  11. Congrats on your decision. I am at about 2300m altitude and judging from the discussions on this forum the seeing at my location seems to be better than most folks in UK have, so I am in favor of larger apertures and pushing my equipment to get the best resolution and to pull in the faintest objects. While by no means scientific I tried to look at images I had done with a Canon D700 (30sec subs) on Celestron 102SLT and C11 scopes to compare to faintest stars captured and it was 15.95 and 17.95 mags respectively - which also appears to align roughly with theory. On the exoplant observing, this reference A Practical Guide to Exoplanet Observing basically says that size matters - fainter and therefore more stars will be observable. All the Best!
  12. If it maybe interests you now or in the future you can also do serious science with the 16" like exoplanet transits...
  13. Hi All, My two cents, the larger aperture should capture fainter point sources like stars regardless of seeing - so for example clusters will be better the larger the aperture. Although I have not tried it there is also deep sky lucky imaging where the resolution of the larger aperture will be an advantage. I guess it depends how much imaging of these kinds of objects are of interest to you. Best.
  14. Very interesting shots, what was your camera? Best
  15. beka

    DSLR M31

    Hi Science562h, Nice widefield image and thanks for the tips. Feels like a lifetime is required to learn and try the different features and options available in all the software packages! So what exactly does the "Pick all black points for all channels" option do to the image. Maybe one trade off is between an aesthetically pleasing image versus one in which you try not to lose any detail. Best
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