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I thought I would share with you my first DSO taken with my new Orion 8" Ritchey Chretien F8 Telescope. The frame is made up of 12 x 4min shots, no light or dark frames, using my Sony A7Rii camera. The camera had the long exposure noise reduction switched on, which does help to reduce the total number of stars captured by the camera, as the Sony A7Rii does tend to overdo the number of stars captured. The telescope was mounted on my trusty skywatcher NEQ6 mount and the guiding was via PHD 'of course' via my skywatcher ED50 guide scope.
The shots were taken from my back garden in Stowmarket, Suffolk where I believe I am a Bortie 4 location, so the skies are mostly dark, with just a little light pollution from the main town, no filters used.
My normal telescope is a Skywatcher ED100 Pro Esprit F5.5, which is an incredibly sharp scope, but with a wide 550mm field of view, great for capturing the whole of Andromeda but a struggle with smaller images like the Iris Nebula. I will say the Orion RC scope did need to be collimated out of the box, which was a little disappointing, and it was not just a little out of collimation, it was a long way out, but with the use of a collimating tool, I soon had it dialled in.
First impressions of the Orion Ritchey Chretien 8" Telescope are fair, not super impressed, as it is nowhere near as sharp as my ED100 Esprit, but then this is to be expected based on price and telescope type, however, the pictures it has produced are pretty good, if you downscale the full 42MP from the Sony A7Rii camera, as can be seen in this picture.
I purchased this 8" Orion Ritchey Chretien OTA mainly for Planetary work, but as yet I have not had a chance to 'get onto' a planet, fingers crossed some clear nights will arrive soon, so I can try.
I welcome comments,
I have set my sights on this OTA, as I think it is a good compromise between aperture and focal length. What I am struggling to find is some good reviews from people who have actually owned and used this scope themselves!
So - any of you peeps had this scope now / in the past? What are your thoughts, and are there any issues / problems I should know about?
It will be mounted on an EQ3-2 for the time being. I hope to have saved up enough by next summer to get a more substantial mount!
Thanks in advance
I am selling my Star Adventurer Pro bundle. The full set is packed in a flight case ready to go. It also includes an extra counterweight pack (an extra 1kg weight and extension bar). I use the additional weight for balancing an ED80 or my Lunt Ha scope. It has seen very limited use so is in excellent condition. I am asking £169 (no offers) pick up from the Harrogate area. The bundle weighs close to 8kg. Bank transfer please.
In the flight case:
Ball head adapter
Illuminated polar scope
Dovetail L bracket
Counterweight kit x 2 (2 x 1kg)
Keys for the flight case
I got one this week, great piece of kit, good focuser and very good quality overall.
There are a lot of screws on this finder, some are a bit in the way wen rotating the focuser.
One thing i miss is that they should have put a photo-threaded hole on the bottom of the finderdovetail for easy mounting on a tripod for travel use, as the advertise it as finder/small travelscope.
As it is now you have to MacGiver a solution yourself
I also tried some different eyepieces and configurations with the stuff i have, the only thing that seems to work is using the standard 10 and 25mm Plossl witch are frequently supplied with telescopes (only tried the 25) with the provided spacer ring.
I also attached a Baader Hyperion 5 and 13 mm but the field stop seems to be inadequate, it looks a bit weird to i might ad.
Like they said, using a diagonal doesn't work, no focus.
Great combo with the ED80, i do wonder how well it will balance...
I didn't use it outside yet, as many of you now the box was off course supplied with bad weather, but i'm confident it won't disappoint .
Clear skies !
The weekend that just passed we went to my girlfriend's parents. The skies in that rural area are pretty much as good as you can get. I don't have an SQM reader, but Clear Outside estimates 21.91.
I didn't take the EQ6R with me, I still consider it a big lump of iron, and the AZ-EQ5 should be on its way back this week as a Stellar mount. So I used the EQ5 which was left in the car for a while. While the tracking/guiding on the RA axis is quite good, the DEC control jumps a lot after multiple consecutive guiding commands, I blame the "enhanced" handset.
So with all the drawbacks, I tried to do align the mount as good as I could and I put the 72ED with the ASI1600 on it and a finder-guider.
Perhaps also focus could have been done a bit better, FWHM in the subs was 3.x.
Below is a quick process from last night, no deconvolution yet and a purple area at the bottom that I have to fix. 58x120s lum, 30x120s each RGB.