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Re: [APML] Mewlon 250
On Mon, 2 Jun 2003, Frank Barrett wrote:
> I'm starting to understand (and hit) the limits of my C8 and am starting
> to consider what my next scope should be (drooling really<g>). What I
> want is an RC, but that's kinda outta reach right now. I've read great
> reviews and I'm considering a Mewlon 250 for the following reasons:
The Mewlon is a Dall-Kirkham - which has even more coma than the sct. It's
a great visual scope (for narrow fields at least) and easy to manufacture,
but i don't think it's meant for photography. Apart from coma, it's
probably made with the smallst possible secondary, so it will have
illumination issues as well.
Radu
>
> 1) The G11 can handle it just fine (only 27 lbs)...no new mount needed.
> 2) Fixed primary...no mirror flop, no focus shift, and no need to
> recollimate every time I move!
> 3) 1/10 wave guarenteed by Tak, supposedly pinpoint stars...like a refractor!
> 4) Affordable within a years time
> 5) 10" aperature (vs. my 8" now)
> 6) removable back for faster mirror cell cooldown.
>
> My major concern is the f/12 focal ratio. Great for planetary stuff, but
> not so good for dso. I believe Tak sells a f/r that get's it down to
> f/9.2, but that's still pretty slow. I'm wondering if anyone on the list
> has any AP experience with this scope and can comment on the use of any
> faster f/r's. And if so, what is the situation with such things as coma,
> vignetting, etc?
>
> TIA, Frank
> http://celestialwonders.com
>
>
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>
--
-------------
Radu Corlan Snail Mail: Bucuresti sect. 1,
rcorlan@pcnet.ro str. Argentina nr. 28, Romania
You can still escape the "Gates" of Hell!
Use Linux!
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