Re: Backplate dimples & Re: Mercury Frustration :)

[tcekolin@xxxxxxxxxx]

     I too have had my share of problems with a dimpled pressure plate ( 
     pentax k1000 ), but a section of roll film paper taped to the pressure 
     plate black side out took care of that.
     
     tony


______________________________ Reply Separator _________________________________
Subject: Backplate dimples & Re: Mercury Frustration  :)
Author:  <infrared@xxxxx> at Internet-Mail
Date:    1/14/98 1:06 PM


I have had some nasty experience with dimples on the back pressure plate.  I 
ONCE used a Minolta
AF9000 camera with a grid of dimples in the pressure plate.  It didn't 
happen regularly, but occasionally the dimples would form a pattern of plus 
density spots on HIE film resulting in dark spots on your prints.  It was 
very annoying to say the least, unless you're looking for that "special 
effect".
     
     
- -----Original Message-----
From: Bill D. Casselberry <bcasselb@xxxxxxxxxxx> 
To: infrared@xxxxx <infrared@xxxxx>
Date: Wednesday, January 14, 1998 12:23 PM 
Subject: Mercury Frustration :)
     
     
>
>
>  Anthony posts, in regards to flourescent lighting ... 
>
>Flourescent lights work by discharging an electric arc through mercury 
>vapour ( inside every flourescent tube is a high vacuum and a small drop of 
>mercury).
>
> As a user of older cameras (Spotmatic F & Canonet QL17), this 
> is what I find to be so boneheaded about the US regulations
> concerning Hg batteries. When one considers the Hg in all the 
> flourescent tubes trashed daily, it seems that the ammount
> from such batteries is miniscule.  Arrrghh !!! 
>
> just to keep this somewhat IR oriented  :)  I invite any of 
> you to check out my first experiments w/ IR film. I have 4 
> images at my site made with the Konica film & my old Voigt-
> lander Bessa II (6x9) out here on the Oregon Coast of the US. 
> From the opening page, they are in the Voigtlander section.
>
> I'm eager to try this new fun film in my 35mm system & am bit 
> curious how "real" the dimpled pressure plate effect is w/ the 
> Kodak HIE. I have heard both ways, so if anyone has definitive 
> info as to a Pentax Spotmatic F it woulsd be nice to know. I
> suspect that the Konica may be OK, but the HIE does sound much 
> more intriguing  :)
>
> Bill
>
>   --------------------------------------------------------------------- 
>
>              for lots of imagry made w/ SpotMatics & prime 
>            Pentax/Asahi Takumars and other classic cameras
>            (& some images of some fine older photo-gear) visit ... 
>
>            http://www.orednet.org/~bcasselb 
>            bcasselb@xxxxxxxxxxx
>    ~75 images at present
>
>                   A Fugitive from the Law of Averages 
>
>   --------------------------------------------------------------------- 
>
>
>
>
>--
>
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End of Infrared-Digest V0 #345
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