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About DorsetBlue

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    Dorchester, Dorset
  1. A lot of tripods have the option of unscrewing the ball mount from the top, just leaving a larger screw (my Manfrotto did). The SA comes with a screw in adapter on the base for the smaller ball joint screw, this can be unscrewed to convert it to the larger size for direct mount on the tripod.
  2. I was referring to there being further adjustment available after the infinity marking on the lens.
  3. Its annoying sometimes when lenses have a "Buzz Lightyear" function i.e. to Infinity and Beyond.
  4. https://stargazerslounge.com/forum/123-video-astronomy/
  5. You will probably have more success with EAA / Video Astronomy with a Goto Dob. Have a look in the EAA forum on this site. But you are probably looking at a sensitive astrocam rather than a DSLR for that. I have had some success with a little dob using an Altair GPCam v2 (not much more than £100). I think your focus can be sorted with your Dob by adjusting the amount of extension of the flextube?
  6. It might be better to ask on the Video Astronomy forum, they (along with other 174 chipset cameras) seem popular there.
  7. The GPCAM is not the ideal camera to start with astrophotography on, especially with a Newt. The FoV is so small, that it is difficult to find what you are trying to image. However it is a great little EAA camera, if you connect it to some low mag DSLR lenses. You would be better off buying a cheap (ideally astromodified) DSLR to go with the Newt and then you will getting results pretty quickly.
  8. Ah memories of my OU Astronomy BSc Unit. The Sun will shrink to a White Dwarf once it has depleted all of it's Helium (Red Giant phase) and leave behind it's outer atmosphere as a planetary nebula. To reach the fusing carbon stage, which leads to a Type II Supernova ,a star needs to be about 8-15 times bigger than the Sun. At 15 times the mass of the Sun, Betelgeuse will end in a Type II Supernova.
  9. GPCAM v2 (Canon DSLR cannot get to focus):
  10. I have one of those and have successfully used it for some astrophotography. Focus is an issue though and difficult to counter, as the primary is fixed.
  11. You might want to check what you can see with that setup first, Field of Vision wise: http://www.skyatnightmagazine.com/astronomy-field-view-calculator Pixel size microns: 3.75x3.75 um Resolution in pixels: 1280x960 ZW ASI120 seems to have a similar sensor size. Without a focal reducer, I think you are going to struggle getting a lot of DSOs onto the sensor. They will just be too big. Planets would be fine though. Now mount wise, that should be fine for planets, as you will take video for those using the GPCAM. DSOs, bright ones should be alright at quick capture rates but again at that Focal Length and without being an EQ mount (field rotation), the captures will have to be short. You are probably heading into the EAA range, so it might be worth seeing if anyone is getting good results with that setup in the Video Astronomy forum.
  12. No, it can only drive in one axis and that is at guide speeds - not slew speeds.
  13. Hi, I cannot find a Yongnuo 200mm f2 lens, they seem to stop at 100mm?
  14. There is always the option of piggy-backing a DSLR on the Mak.
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