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RAC

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RAC last won the day on May 29 2014

RAC had the most liked content!

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About RAC

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    Proto Star

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    Onerahi,Whangarei, New Zealand
  1. Here's an image of Ganymede for those interested. Ganymede 3/3/2017 by Raymond Collecutt, on Flickr
  2. I'm using the Onstep system. It's free apart from the hardware. It's a stepper based system that uses either an Arduino mega 2560 or a Teensy 3.2, the Teensy is way better! The system uses bluetooth and has a good app as well as being able to use it with just about any software that can use the LX200 protocol.
  3. Hi, It's been a long time since the last time I posted anything here. I was mostly into deep sky shots back then but planetary imaging has taken over. I've been making mirrors and scopes over the last two years with a goal of making a good big planetary scope ready for Mars in 2018. That scope may end up being my current 20" f3.8 tracking dob or it could be a 25" or 30" version if get around to it. For now the 20" is doing well. So here's a few shots. equipment: 20" f3.8 traking dob, ASI224MC camera, ZWO ADC, 5 x powermate. 5/2/2017 Derotated Jupiter by Raymond Collecutt, on Flickr 3/3/2017 Jupiter 2017-03-03-1337 by Raymond Collecutt, on Flickr
  4. You can put it on a Canon camera, set the aperture to what you want then hit the DOF preview button and then take the lens off the camera with the button held on. If you want to stop it down without causing diffraction spikes then get a lens cap and lathe a hole in it the right size. My 200mm f2.8L is really good with only blue having a little problem around the corners. I made an external aperture mask using a lens cap. I would only run it stopped down to f3.5 when using a blue filter.
  5. Well that is very interesting, the color one is horrible to look at compared to the mono one. The color one looks brighter but there is a lot better data in the mono image and way less noise?
  6. I can fully recommend a ZWO ASI224MC and an ADC also from ZWO. And here's a 3d image of Mars done with both of those with my 20" f3.8 dob + a 5 X powermate.
  7. Wow looking really nice. I really like the carbon secondary holder, similar to my ones I make. Have you thought about motorizing the scope. I'm doing that atm with my 20" dob. I'm going down the Onstep road as any other option just costs way too much.
  8. I only even removed the IR filter with my 60D and that worked fine but I ended up selling the camera before really using it. The only camera I ever made mono was the 1000d in the first post of this thread.
  9. By the time you stack the video or images they will disappear. I won't worry about them.
  10. Here's a shot of my setup. It's as simple as having half the led cut off with the knife edge and looking at the return beam below the led. There isn't a lot in it between pin holes, slits and slit less IMO.
  11. Sounds good but what about finding a motor with a reduction gearbox. You will find figuring sooooooo much more easy with it turning.
  12. Yes I hope there are no more out there like mine. What I find amazing is how well it performed in that state! To think it could take Mars pics like this blows my mind. Mars, Blue - Green - Red - RGB by Raymond Collecutt, on Flickr
  13. Those star test pics are stacked images done with a planetary camera. Making a small mirror is nothing like making the mirror you did.
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