Re: Re: [APML] Epsilon 160 and 210 informations.

["Jim Ives" <flyboy9990@earthlink.net>]

Tiva the E-210 Produces a 57mm dia image circle. My E-160 only produces a
49mm image circle.  Good enough for 35mm but probably not medium format.
    Honestly if your looking for something with fast optics these scopes are
awsom.  The colmination is critical but the thing is built so heavy duty
I've only had to tweek my secondary a couple times. For me, focusing was my
biggest problem.  Ted at Hutech clibrated a KEF for me and now I can have it
focused in about 5 min.  If you want to do Ha imaging or anything like that,
they really cut down on the exposure time.  There not quite a Schmidt, but
next best thing!    Max exposure with mine (unfiltered) from a dark sky site
is 45min. That's pretty fast to hit the sky fog limit.  I love mine because
it's so low maintanance and I can very quickley take multiple exposures with
it to stack.

Jim Ives
 http://flyboy999.freeyellow.com (Astrophotography)
http://bwphotography.hypermart.net (Black and White Photography)
 flyboy9990@earthlink.net


----- Original Message -----
From: "Teïva Leroi" <leroiteiva@minitel.net>
To: <astro-photo@seds.org>
Sent: Saturday, March 15, 2003 11:00 AM
Subject: Re: Re: [APML] Epsilon 160 and 210 informations.


> Jim and Chuck,
> thank you for your help.
> For you, a good apochromatic 100-130mm refractor will be better in use
> and results??
> teiva
> http://www.astrosurf.com/leroi
>
>
>
> >Teïva,
> >
> >You will have noticeable vignetting with these scopes as the secondary
>
> >mirror is not nearly large enough to fully illuminate medium format.
> >Collimation is very critical too as it needs to be within a couples
> >thousandths across the film plane. It's possible, but not easy to do
> >when you have a focuser and two mirrors that all need to be aligned.
> >Focusing is probably the least of the problems.
> >
> >Chuck <aa6g@aa6g.org>
> >
> >--------------------------
> >
> >> Hi all,
> >> I would like to have some informations about the takahashi epsilon
> 160
> >> (f3.3) and 210 (f3).
> >> Is it possible to use medium camera (4.5x6 or 6x7cm) with these
> scopes?
> >> Are focus and collimation easy to make?
> >> Thank you for your answers.
> >> teiva
> >> http://www.astrosurf.com/leroi
> >
> >_______________________________________________
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> >Astro-Photo@seds.org
> >http://seds.org/mailman/listinfo/astro-photo
> >
> >
> >
>
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