[pure-silver] Re: Light source vignette or hopefully avoiding it

On Friday 14 July 2006 17:07, Richard Knoppow wrote:

> think you may have an easier time making an enlarger from an
> 8x10 view camera. The camera must have front focusing
> capability. The light source can be made using fluorescent

        I've got an 8x10 monorail that could be converted but I don't like the 
idea 
of trying to build a horizonal setup. 

>    The light box is mounted on a support which also takes
> the camera. The camera should not have to support the light
> box. The new back is snugged up to the light box. The whole
> thing is mounted on a stand. For temporary use a heavy duty
> tripod will do.

        If I used the monorail I'd mount a couple of 1/4" knobs to a table and 
attach 
the monorail tripod mounts to that. Something like these:


http://www.leevalley.com/wood/page.aspx?c=1&p=52801&cat=1,43455,52800

        For the back I'd build a box with a drawer for the negative stage. The 
box 
would be big enough to sit on the table. But the  easel end is the part that 
bothers me.


>
>    To find the extension needed for the negative holder for
> the Elwood first determine the smallest print you will want
> to make. This determines the greatest distance from lens to
>

        I used 2x in the formula. Also figured a 12"x12" negative and a 5" 
narrow 
spot. The smallest spot is actually 5.5" and the negative will of course be 
smaller then 12x12. So I think a 3" gap between the old part of the enlarger 
and the negative would work. Of course I could have screwed up the math -)

Nick
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