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OMC 200 deluxe by Orion Optics UK. Opinions

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#1 rfic1

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Posted 04 September 2015 - 03:12 PM

Considering purchasing one of these 8" Mak Cassegrains. Not much info available so I am looking from any information from those who may have had experiences with one.  I had a TEC 200 f/15 that I parted with and have since regretted doing so.



#2 vahe

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Posted 04 September 2015 - 05:38 PM

I have not seen one of these and do not know much about them.

But since long focus Maks are my top favorites for planets a few thoughts on 8” f/20 Maks.

The OMC comes in two versions, metal tube and 1/6th wave for about $7K, and a more expensive version in carbon tube and 1/8 wave for just under $10K, obviously these are not cheap.

Generally speaking F/20 Maks have a very limited appeal, TEC made some but stopped its production due to lack of demand and switched to F15.5, I have the very last 200 F/20 TEC made in 2002.

F/20 Maks appeal only to the hard core planetary fanatics, meaning if you buy one you will have a tough time selling it if for any reason you decide to go for something else.

If you find someone with OMC 200 ask about the cooling issues, the tube has a smaller diameter compared to TEC Maks therefore the light path comes awfully close to the tube, that is a potential red flag as far as cooling and internal currents are concerned.

Personally I prefer F/20 over F/15 variety for the simple reason that both have awfully narrow fields and if I am accepting this compromise I might as well go for something with the smallest CO which F/20 offers and F/15’s do not.

The contrast is up there, in my case the TEC offers better planetary contrast at high powers than my long focus AP155EDT.

And, good luck.

 

Vahe



#3 Max Power

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Posted 05 September 2015 - 08:00 AM

I've got the smaller 140mm f/14 1/10th wave and it is really good.  Refractor-like images equal to the best 5"ers.

 

BUT the cooldown times mite be a problem.  Years ago had a Russian 8" maksutov and it took at least 2 hours to reach outside temps.

 

Smaller maks mite be the better maks.



#4 dweller25

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Posted 06 September 2015 - 04:09 AM

I had the 1/8th wave OMC200 Deluxe and it was very sharp, giving planetary detail equivalent to a 6" APO when cooled.

 

Cool down however (even with the fans running) took a long time, if I could have mounted the OMC200 in a permanent observatory it would have been a keeper.

 

IMG_0708.JPG


Edited by dweller25, 06 September 2015 - 04:12 AM.


#5 Kevin Barker

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Posted 06 September 2015 - 04:32 PM

I had the 1/8th wave OMC200 Deluxe and it was very sharp, giving planetary detail equivalent to a 6" APO when cooled.

 

Cool down however (even with the fans running) took a long time, if I could have mounted the OMC200 in a permanent observatory it would have been a keeper.

 

attachicon.gifIMG_0708.JPG

I have a similar scope. The f-15 Intes Deluxe 815. Slightly larger secondary obstruction. (24% v 22%)

 

I reckon my scope might actually beat out a good six inch apo on planetary and deep sky. I appreciate they are apples and Oranges with different focal lengths and image scales.

One consideration for apos is they nearly all have correction issues at the red end of the spectrum where a lot of good planetary detail is seen on the likes of Mars and Jupiter. There are exceptions but they are very costly.

 

 Having said this I've yet to use my scope on Jupiter except in poor seeing. I also have found the fan is not necessary in my much warmer maritime climate.I live in Auckland, New Zealand 36.7 deg S.  My scope cools relatively quickly as it did for the previous Australian owner. It probably has a special glass Astro-Sitall?? for the primary.

 

Yes Lancashire will be a lot cooler and the difference between outside and inside might be substantial. 

 

One advantage these Mak's have is they are relatively compact. 6 inch apos tend to be longer and heavier. I own a 5.1 inch triplet apo which is longer and slightly harder to mount then the Intes Mak.

 

Kevin B



#6 jrbarnett

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Posted 09 September 2015 - 10:24 PM

I'd love to try one, but they are just way too costly on this side of the pond IMO.

 

$7k for a standard version.  Yikes.  There are a lot of very nice scopes available for $7k.

 

- Jim



#7 Kevin Barker

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Posted 09 September 2015 - 10:51 PM

I'd love to try one, but they are just way too costly on this side of the pond IMO.

 

$7k for a standard version.  Yikes.  There are a lot of very nice scopes available for $7k.

 

- Jim

Jim

Yes they are expensive.  Especially as the 140 version is about 10% the cost of the 200.

 

They also have a narrow tube compared to the mirror diameter and are not internally baffled.

 

Larger Maks are now quite expensive. Perhaps because of low production numbers?

 

The Intes Maks in the larger sizes cost a lot.

 

Kevin



#8 Live_Steam_Mad

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Posted 09 February 2016 - 02:20 PM

At one time the OMC200's were 2400 GBP, now they are 6400 GBP (10,000 USD). I mean, come on, they're good but worth THAT much? Not to me at least. I don't know how they sell them at that price. Just IMHO.

 

An Edge 8" HD is like 1300 USD new from a typical US retailer, or 1070 GBP over here from Rother Valley Optics. I know the designs are rather different but can Orion UK really justify 6x the cost of the Edge HD 8" for the OMC200 ?

 

I find it's price rather frustrating, as I have a Meade 7" Mak and I like the Star images at high power from it so much that I am wanting to buy an 8" Mak. The Bosma 8" Mak is F12 and 33 per cent obstructed from it's conical secondary baffle, and Aberrator 3.0 Beta 2 shows that the performance on Jupiter is noticeably rather more contrasty with the 22 per cent CO (maybe 24 per cent by the time it's baffled) of the OMC200.

 

I would put up with going from 50x and 62' FOV of my C11, to 71x and 44' FOV (with my Meade 56mm Plossl), plus possible horrid vignetting (compared to my C11 and 7" Meade Mak) making it even more difficult to find things, just to get the extra planetary performance and beautiful appearance of double stars - for example it does have to be admitted that my C11 gives slightly "muddy" views with some scattered light and additional SA that my 7" Mak doesn't.

 

If it was about 2000 quid I would be putting my deposit in for one right now. At 6400 GBP, no chance at all.

 

I can even still buy an STF 8" F10 Mak for 2300 GBP from Widescreen Centre, London, according to their website. Pity that the STF and Bosma are not more like F15 (the Bosma is closest at F12). I have been trying to find the Bosma 8" Mak for sale anywhere, without success so far.

 

Regards,

 

Alistair G.


Edited by Live_Steam_Mad, 09 February 2016 - 02:23 PM.


#9 Bill Barlow

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Posted 09 February 2016 - 07:38 PM

Even a deluxe Intes-Micro 8" f/15 MCT OTA is cheaper than the 8" OMC scope.

 

Bill



#10 vahe

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Posted 09 February 2016 - 07:52 PM

Do not know how practical is it for you to buy used from USA but I would also consider 8” TEC Maks, they show up from time to time on Astromart for well under $5K, the most popular version is the f/15.5 and in quality department they are about the best.

 

Vahe



#11 coopman

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Posted 09 February 2016 - 08:50 PM

You might be able to get more input about this scope on The Stargazer's Lounge, which is more of a UK-based forum.



#12 Tom yates

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Posted 10 February 2016 - 03:33 PM

HI Guy's I have a 8" OMC 200 and in my opinion it is one of the best planet/ luner scopes i have ever used

i did side by side test's with a TMB 152 and for me was the better scope on the planets 

so much so that the TMB was sold.

You can buy these for £ 1500 USED IN THE UK.




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