So, any thoughts? Worth it? Not worth it?
6-inch Mak?
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6-inch Mak?
So, any thoughts? Worth it? Not worth it?
Man... That's some icky-tasting stuff!
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Re: 6-inch Mak?
Cheers,
JT
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- notFritzArgelander
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Re: 6-inch Mak?
They used to cost more than Chinese spot Maks and were clearly better. Since the Putin redirected the companies that made them into defense production they have become hard to find.
Here is a link that has some Santel and Intes Micro scopes
http://www.hoo-germany.de/index.php/cat ... grain.html
https://www.teleskop-express.de/shop/in ... copes.html
I've dealt with Teleskop-Express happily.
Of course if you are budget minded the Chinese spot on the corrector Maks are the way to go. But my Rutten Maksutov
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Re: 6-inch Mak?
I assume your ST120 is the Orion, and is not an
All the best,
Dean
Binos: Steiner Wildlife XP 10x26, Swarovski 8x30 Habicht, Zeiss SFL 8x40, Vanguard Endeavour 10.5x45, Fuji FMTR-SX 10x50, Tak 22x60, Orion Resolux 15x70
Eyepieces: way too many (is that possible?), but I do like my TV 32mm plossl, 13mm Nagler T6, 27mm Panoptic and 3-6mm Nagler zoom, plus Fujiyama 18mm and 25mm orthos and Tak 7.5mm LE
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Re: 6-inch Mak?
Man... That's some icky-tasting stuff!
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AT50, AT72EDII, ST80, ST102; Scopetech Zero, AZ-GTi, AZ Pronto; Innorel RT90C, Oberwerk 5000; Orion Giantview 15x70s, Vortex 8x42s, Navy surplus 7x50s, Nikon 10x50s
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Re: 6-inch Mak?
If your 120mm is an
- notFritzArgelander
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Re: 6-inch Mak?
You would gain the ability to get high magnification views of the Moon and planets that are free from chromatic aberration. Nice as a 120mm ST f5 scope is they don't take high magnification well. Whether the preferred Rutten or Gregory (spot on corrector plate) design, a Mak will open up a whole new range of observing possibilities.
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Re: 6-inch Mak?
iOptron 150mm Rumak Maksutov-Cassegrain
https://www.highpointscientific.com/iop ... n-ota-6101
Is this the type, nFA?
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Re: 6-inch Mak?
It claims to be and might be. I'm not sure because I can't see the collimation screws on the secondary. So here's what I glean from careful examination of the photo.Don Quixote wrote: ↑Sun Aug 25, 2019 4:48 pm IOptron also makes the Rumak type. I would like to have one of these. :-)
iOptron 150mm Rumak Maksutov-Cassegrain OTA - 6101
https://www.highpointscientific.com/iop ... n-ota-6101
Is this the type, nFA?
At first glance it looks like it's just a silvered spot on the corrector which would make it NOT a Rumak. But if you look closely it might just be a shiny covering over the collimation screws. I can see evidence of baffles around the secondary which indicates IT IS a Rumak. So does the f12 which is a little fast for a Gregory Mak. (f13 or slower, f15 is better for them.)
There is a YouTube video that shows what my MK66 looks like.
https://www.youtube.com/watch?v=XHlpPp-nbz4
The Intes has wonderfully effective knife edge baffles that the iOptron doesn't seem to share. I'll see if I can post a pic later that shows the
My take is that if I were in the market, I'd give the iOptron a go.
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Re: 6-inch Mak?
http://www.ioptron.com/v/Manuals/6101_MAK150_Manual.pdf
http://www.ioptron.com/v/Manuals/6101_M ... mation.pdf
It is unusual for the collimation on a Rumak to be done back at the primary but not impossible.
There is also a CN review where the owner of the iOptron misidentifies the corrector as the objective but seems sure about the difference between a Rutten and a Gregory Maksutov.
https://www.cloudynights.com/topic/4743 ... -mak-cass/
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Re: 6-inch Mak?
I like the design on the Internet Micro baffling a little better with knife edges just behind the corrector to the tune of 6 to 7. The Intes baffling has a very long Cassegrain baffle sticking up from the center hole in the primary.Then there is a knife edge at the end of the cone. In the picture there is very large circle (the primary), then a smaller one which is a reflection of the secondary in the primary, and emerging from that down and to the right is a dark conoidal cylinder terminating in a cutoff bright circle. That last is the front end of the baffle illuminated from the visual back.
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Re: 6-inch Mak?
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Re: 6-inch Mak?
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Re: 6-inch Mak?
Refractors None
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Re: 6-inch Mak?
Sky-Watcher 90mm f/13.8 Maksutov-Cassegrain on motorized Multimount
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>)))))*>
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Re: 6-inch Mak?
While doing that you could consider the OMC140 as well. (5.5 inch)
https://www.orionoptics.co.uk/OMC/omc140maksutovca.html
I have the normal 1/4 P/V one, but Wolfgang Rohr tested the 1/6 P/V version:
http://r2.astro-foren.com/index.php/de/ ... tografisch
On Planets it equals my 120mm Doublet
GrabnGo on Alt/AZ : *SW Startravel 102 F/5 refractor( widefield, Sun, push-to), *OMC140 Maksutov F/14.3 ( planets).
Most used Eyepieces: *Panoptic 24, *Morpheus 14, *Leica ASPH zoom, *Zeiss barlow, *Pentax XO5.
Commonly used bino's : *Jena 10X50 , * Canon 10X30 IS, *Swarovski Habicht 7X42, * Celestron 15X70, *Kasai 2.3X40
Rijswijk Public Observatory: * Astro-Physics Starfire 130 f/8, * 6 inch Newton, * C9.25, * Meade 14 inch LX600 ACF, *Lunt.
Amateur astronomer since 1970.
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