Re: [APML] Pentax Focus Screen (SD-11); anyone used this?

["Antonio Torres" <atorresm@telefonica.net>]

I have used SD11 , SG20 , SA26  AND SD21. I feel more connfortable with SA26
(Microprism with matte field) than with the clear SD11.  SA26 has enough
brightness
to be able to focus without problems ,even at f/6  ratios .I have used it
with my AP f/8,35 EDT
working at f/6 (With focal reducer)

The manufacturer says literally  that " is a microprism screen with a matte
field suited
for telephotos longer than 300mm. A  4-degree prism angle permits use up to
f/8 "

Hope this helps

Regards


Antonio Torres
http://www.cielonocturno.com/english/engindex.htm



----- Mensaje original -----
De: "Glenn Ray" <glennlray@mail.ev1.net>
Para: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Enviado: viernes, 07 de noviembre de 2003 4:37
Asunto: [APML] Pentax Focus Screen (SD-11); anyone used this?


> Has anyone used the SD-11 clear focusing screen for the Pentax LX?  If so,
> could you comment on your experience with it?  I'm curious if focusing is
> harder/easier with a clear screen.
>
> BTW, I'm using a Pentax Magnifinder with adjustable diopter.
>
> You may reply to me off-list.
>
> Thanks,
>
> Glenn Ray
> Cypress, TX
> http://users3.ev1.net/~glennlray/Astro
> glennlray@ev1.net
> _______________________________________________
> Astro-Photo mailing list
> Astro-Photo@seds.org
> http://seds.org/mailman/listinfo/astro-photo
>

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