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best 90mm refractor under $2,000?

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#26 Lane

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Posted 14 November 2012 - 02:45 PM

Weight is why I did not mention the AT90EDT it is more than twice the weight of the TMB92L. In fact it is pretty close to the weight of my AT106.

Optically these AT APO's are as good as anything I have used. In fact I prefer my AT106 to the TAK 102 and the TV 102, which are the only other two 4" refractors I have had a chance to use a lot.

#27 m9x18

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Posted 14 November 2012 - 03:18 PM

Thanks for clearing that up, Mark. Seems there's some conflicting information around on this. I was seeing some older info last night that was leading me to think it was the TMB design. Apparently at that time, TMB/Markus thought it was! This post seems to sum it up pretty well.


Thanks for the link Judd. As for the differences between the 80/480 and the 80/600, it's all a matter of preferences. There are more things to mention but to keep it short, the 480 offers a faster focal ratio and wider fields of view. Wider fields mean capturing more expanse of the sky and more flexibility in framing your target(s). The 600 offers a longer focal length. That lends itself to higher magnifications with a given eyepiece and more depth of focus. More depth of focus leads to a bit more ease in focusing your target. Optically, both are superb and one could not go wrong with either.

#28 jtaylor996

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Posted 14 November 2012 - 04:33 PM

Lane, I'm just noticing you're in my neighborhood, along with Robert. Maybe we should plan a 'fractor gitogether like those east coast guys do.

Is your Tak an FS or TSA?

#29 Lane

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Posted 14 November 2012 - 04:53 PM

I don't have a TAK but a guy in TAS has one which I have used many times. Not sure the designation but it is an older one with the flourite outer element, a nice scope, although it has a bit more CA than I like. He usually has it mounted on a GM8, which is a great platform for that scope. I have not seen him at the site in several months though. The guy with the TV 102 has come to several of our outreach events over at Copper Breaks State Park. He is not in our club, he is in the Fort Worth Astronomical Society. I was surprised how many people went gaga over that 102 he set up at CBSP, considering we always have an 18" Obsession out there. But at a dark spot like that a 102 really delivers some pretty views.

Do you belong to the Texas Astronomical Society (TAS)?

#30 jtaylor996

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Posted 14 November 2012 - 07:03 PM

I used to... but my membership has lapsed lately. I've only been out to atoka once, and everybody else (the 3 other people) were all imaging with laptops glaring... so not a whole lot visual going on there.

#31 pcctex

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Posted 14 November 2012 - 07:09 PM

Would the Stellarvue SV90T be a contestant in this discussion?

#32 m9x18

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Posted 14 November 2012 - 07:50 PM

I don't see why not. The 90T is an outstanding scope.

#33 Don Allen

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Posted 14 November 2012 - 08:46 PM

Not only that but there is a sale going on with a 90mm Raptor right now. Great scope for well under 2K.

#34 zippeee

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Posted 16 November 2012 - 12:18 AM

Not only that but there is a sale going on with a 90mm Raptor right now. Great scope for well under 2K.


+1

I love the views through my Raptor and find f/7 perfect for visual. I wish I'd got $300 off mine though!






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