[LargeFormat] Ground Glass Focusing

[Lee Carmichael]

sounds like a trip the eye doctor is in order.  Happens to most of us.  One
of the main reasons I went to Large Format.

lee
with glasses.

----- Original Message -----
From: "Clive Warren" <cocam@cableinet.co.uk>
To: <largeformat@f32.net>
Sent: Tuesday, January 01, 2002 3:02 PM
Subject: [LargeFormat] Ground Glass Focusing


> Thought I would share an experience with you.....
>
> Whilst visiting relatives over the holidays, took the 4x5 large
> format rig into a local cathedral for a few atmospheric architectural
> shots using a new to me 90mm Super Angulon. Having set up and paid a
> small suggested fee for the privilege of taking photos (use of video
> cameras was three times the cost!), started to focus the rather dim
> scene on the GG. It was a difficult scene to focus as the light was
> so dim.
>
> After 5 minutes of trying to focus under the darkcloth I decided that
> there was something wrong with either the lens or the camera, but
> couldn't for the life of me work out what it was. It was just not
> possible to get near infinity focus on some organ pipes at the far
> end of the building that were fairly small on the GG.
>
> After having taken the lens off the camera and generally poking
> around, put all back together and tried again - same results, no
> sharp focus possible on the GG.
>
> Stood back and looked at the camera, the organ pipes, my watch, and
> wondered if the pubs were open.  Then glanced again at the GG - hang
> on it was in focus now! Got closer to the GG and tried to fine tune a
> little before getting out the loupe - all out of focus again. A
> lightning bolt of inspiration - head out from under the darkcloth and
> held finger in front of eyes same distance as I was from the GG - it
> was out of focus .. doh!
>
> Cheers,
>         Clive
>
>
>
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