[LargeFormat] fresnel screen orientation

[David Swinnard]

--->
Sinar had theirs on the human side of the GG so it could be removed, and
scratched, and broken and replaced at an extreme cost.  I suspect that
Sinar had their rings toward the GG. <---

Yup, Sinar fresnel is "outside" but with rings against the glass.  Yup,
it scratches, a bit, but mine dates from the mid -70s and is still
perfectly usable.  The advantage of having it outside is that it's easy
to remove when necessary.  I've found, over the years, that removing it
made focusing in some unusual circumstances. The Sinar fresnel pops on
and off very simply.

Dave


Les

On Thursday, November 6, 2003, at 11:44  AM, Vincent Dobson wrote:

> Hi,
>
> I just bought a camera with a horseman fresnel screen.  They had the
> thin
> fresnel sandwiched under the groundglass on the film side but with the
> fresnel groves next to the groundglass.  I thought the fresnel groves 
> should
> be toward the film, but it has been a while.
>
> Which way?
>
> Thanks all.
>
> Vince Dobson
> Visions In Nature
> www.VisionsInNature.com
>
>
>
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