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Post by lesliehess on Mar 11, 2011 22:13:48 GMT -5
Watcher, I have used this same set of Russel optics Konigs for years. I can honestly say that the lunar view is as color free as I have ever seen in either dobs or refractors. Here is a unprocessed color image. I cropped the corner so we can all see exactly how much ca we are talking about. A very thin layer of clouds were present. Taken in neutral color setting. panoramictimes.com/IMG_5140-c.jpg
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Post by Watcher3 on Mar 11, 2011 23:38:39 GMT -5
Outstanding! If it's that good on the moon, I imagine everything else has pretty much undetectable CA.
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Post by lesliehess on Mar 13, 2011 11:41:39 GMT -5
You are correct. The lens peforms very very well.
Keep in mint this was prime focused on a 7d sensor and the right side of this crop is 12 or 14 mm off of center making this worst case scenario. A violet killer would make this perform like a 5k lens.
I ma noticing that it starts getting soft at about 450x plus I suspect this is partially due to a cheap barlow and low end ep plus at some point the lens will soften up anyway.
I wonder what high powered around 5mm ep i should get. Suggestions are more than welcome. With price a issue.
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Post by Watcher3 on Mar 13, 2011 18:35:39 GMT -5
58 degree field of view and 12mm of eye relief. I have a clone of the older TMB planetary. The new version is 60 dollars from Astronomics. personally I don't like the peephole plossls and orthos at 5mm.
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Post by istarmullet on Mar 13, 2011 19:06:16 GMT -5
Can you post on how you made your scope mover and maybe toss in some photos, I would like to build one.
Thanks in advance.
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Post by lesliehess on Mar 13, 2011 20:51:35 GMT -5
Much appreciated W. I think I will give a 5mm a try. I am almost certain the 11 mm I am using is causing some issues. I did not take any construction photos of the dolly/mover. I can show you a close up and answer any questions. It is made from hardwood not a softwood like pine. I suppose 2x6 pine would work ok. At the T where the 2 main members intersect the wood is gued with titebond3 and clamped till dry. Where the tripod legs meet the wood I drilled 2 inch holes partially through to mate with the legs and keep them from sliding around. The 5 inch wheels on 2 legs are rigid and the third swivels and locks. Harbor Freight sells a great selection of casters and wheels for pretty cheap. Attachments:
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Post by lesliehess on Mar 17, 2011 19:21:33 GMT -5
WOW, I got the 5mm in today. I have a touch of the flu but got my son to set the scope up. The 5mm is sharp as a tack looking at the moon during daylight. I hope to get a peek tonight.
2400/5=480x Absolutely awesome performance. The 11mm architecture is poor and did not work well with the barlow.
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Post by Watcher3 on Mar 17, 2011 21:28:44 GMT -5
Glad you like it. I have the whole set, and I don't think I could live without them. Easy on the eye, and the close mm spacing allows me to match the eyepiece to the seeing under all conditions. Hope you feel better. I got a nasty bug myself, but in my case it's from wading through ice cold flood waters this past week! Gonna be awhile before I can even drag out my G&G.
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Post by istarmullet on Mar 25, 2011 21:15:05 GMT -5
It is made from hardwood not a softwood like pine. I suppose 2x6 pine would work ok. At the T where the 2 main members intersect the wood is gued with titebond3 and clamped till dry. Where the tripod legs meet the wood I drilled 2 inch holes partially through to mate with the legs and keep them from sliding around. The 5 inch wheels on 2 legs are rigid and the third swivels and locks. Harbor Freight sells a great selection of casters and wheels for pretty cheap. So I started to build a mover like yours, is the glue strong enough to not worry about bolting the two main members? I figure my weight load is 130#. Using the glue you suggested.
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Post by lesliehess on Mar 26, 2011 17:19:49 GMT -5
I used beechwood which has a very uniform grain. I used no bolts just TB3. If I were using ply or pine I would probably think about using some screws on the main members intersection. This scope is right in your weight range if not little more.
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Post by istarmullet on Mar 26, 2011 18:04:13 GMT -5
I am using oak, they did not have 2X6 as you suggested so I am gluing 1X6 together.
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Post by lesliehess on Oct 2, 2011 0:52:15 GMT -5
The overtime express has subsided at work finally. Sorry about the absence. I hope your buggy turned out. Please post some pics.
I just got oversized pneumatics on mine, I can now move this across the yard and to me shop and driveway.
Now for the cool part. I installed a light baffle/dew sheild and this increased my contrast to extreme cool. I also finally got my hands on a real EP. I ordered a 10mm pentax and absolutely love it.
Looking at Jupiter tonight at 240 power. The moons appear superbly round. Surface/cloud detail is phenomenal. I can see details all over the planet. The ring Nebula is almost as detailed as I remember the 24 inch dob I looked through last year. I am still blown away by the performance.
I added a tracking gear to the RA Lenord at gototelescopes.com made me one to my specs.
Now the most important part. With the high end ep comes a real star test. Inside and outside focus were virtually the same concentric, even ring pattern. Very round in form with slight noise around the edges. Violet center was the main differance between inside and outside focus. I think this is a better report than the Russel optics 11 mm yielded.
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Post by boomboom on May 20, 2013 5:23:43 GMT -5
Thank you so much for the compliments. The forecast looks good for this weekend. Keeping my fingers crossed. A young man down the road keeps asking my wife when I will be set up again. I wonder how it would have affected me at 13 years old to have seen through something like this. All I had was a 50mm f 10. It is so rewarding when a youngsters curiosity for astronomy is aroused. I think I can answer what happens to a young bloke with a big frac around. As a 16 year old I got to use the 9" f15 'Oddie' refractor on Mt Stromlo in Australia for one night a year for a year. Canberra is 2,000' up and has lots of crystal clear nights. Ever since I have always wanted a long FL frac...very affected to say the least. There is nothing like the view through a large frac in my opinion. In Australia using a refractor as a visual instrument is rare, an achro is even more so. For the last 30 years the Oddie has been one of my favourite memories from school days. Hope this happens to the kid down the road! Unbelievable good scope too by the way...speechless really. Matt
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