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johnrt

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Everything posted by johnrt

  1. Show off Here is mine in my back garden where I image from, house to my back and trees to the north. It's a good representation of the sliver of sky that I can see from my unfortunate back garden location. It's about 2/3 years old, so the trees are even bigger now!
  2. Your quite right it's not a black art & is certainly possible, but for someone just starting out when they want to be capturing some images I think fiddling with collimation would be very frustrating and off putting. I think the 130P or an ED80 is a good shout.
  3. An f/3.9 reflector is pretty difficult to collimate, do you have any experience with collimating reflectors? A refractor, like Michael says above is pretty much plug & play. What mount do you have in mind, all successful DSO imaging rigs are built from the ground up. Mount first, rest later!
  4. Thank you for all the comments! The truly amazing thing about thing about the 6"RC is that it doesn't get more exposure as an imaging scope and not more people have caught on, perhaps Chris is right and the 8" version is preferred. I have thought about upgrading to the 8" RC but then what would be the point, especially after the weather since the end of May in the UK has been terrible ??? I have the latter part of last year and all of this year so far honing my LRGB skills, which is a dark art all in itself, but as they say with capturing the data - rubbish in, rubbish out! PS. I last collimated this scope in Summer 2014 and it's still bang on!
  5. Good luck Ian, looking forward to seeing some images from the RC.
  6. Interesting thoughts to consider ideed Olly, you've just left me wondering where to mount my 2" IDAS if I remove the CCDT67 (it currently screws in to the front of it). I do see where you are coming from, but I also admit that I do like the slightly wider framing in the shots above, there's a background fuzzy just creeping in to the edge of the frame in nearly all of them BUT! I would be fibbing if I said I hadn't checked out numerous targets and rejected them as I didn't quite have the focal length to do them justice, these are the ones that got through!
  7. Always with the reducer Steve, f/9 would be sooooooo slooooooooooowwwwwww!!!!
  8. Thanks Ian, so long as you’re prepared you won’t regret buying either the 6 or 8” RC. Just on the subject of focus drift - I used to have a carbon 80mm triplet refractor and found that the scope contracted a large amount moving the focus point as the temp dropped, it is as Sara says, a problem if you are manual focusing. However with the metal tube of the 6” RC I find there is no focus adjustment needed at all, just focus at the start of the night and forget about it. Perhaps this is due to the carbon body that just expands and contracts more than the standard metal tube? The reducer that is commonly used with the 6, 8 & 10” RC’s is the Astrophysics CCDT67, it works brilliantly. I’ll also agree with Sara that the feathertouch is a must have. Have you now sold your 8” RC Sara? This thread is rather old as hasn’t got any recent pics from the 6” RC in it, so here’s a couple from galaxy season earlier this year (before the light nights ruined the fun). John.
  9. What can I say about this? I just don't know. I really don't. Stupidly good. Absolutely ridiculously good.
  10. The 460ex is fine with 1.25" filters. You can even get away with them on the larger 383l if they are kept close to the camera chip.
  11. I have the 2" IDAS which sits infront of the filter wheel and I leave in place permanently - even for narrowband. The IDAS has over 95% transmission for Ha so I'm only missing out on an insignificant amount of photons by leaving it on all the time.
  12. Doug, I agree the 6"RC is a great scope, if you're prepared to get stuck in to it. My latest upgrade for it is in the post from that America - a Losmandy dovetail for mounting the OTA to my AZEQ6. http://www.deepspaceproducts.com/d-series-dovetail-plate-astro-tech-orion-rc-6-quot-_8_4234_8580.html There have been many images with this scope since I last updated this thread, and rather than re-post them all here as many were posted individually in DSO imaging section, you can find them all on my webpage if your interested https://cloudedout.squarespace.com/blog/
  13. I have nothing to say about this other than stupidly good. You can get lost amongst the dust and clusters in there for hours.
  14. Expensive equatorial mounts.

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