I have been having a play.
I decided to have a go at mounting some orphaned Eastman Ektar cells that I have utilizing the Jim Fitzgerald timber barrel technique.
http://www.largeformatphotography.in...ght=ektar+wood
He used Walnut I thought I might use teak.Then I remembered that I have a largish roller blind shutter to which the two lens groups could be mounted to either size. I started looking through some piles of photographic detritus that I have here for some bits and pieces to help me with getting the spacing of the lenses right and one of the things that fell to hand was the lens panel from an old field camera. (Sanderson I suspect). It has a rotating middle section and a panel across the middle of that which shifts from size to size.
The thought was that if the front group where mounted to that panel on the front of the roller blind shutter it would be possible if one so desired to affect a lateral shift of the front lens group in relation to the rear lens group. Obviously there would be a correct neutral position but it would be possible to adjust the lens position either side of neutral.
Now I know with some lens designs it is possible to get varying degrees of soft focus by changing the separation of lens elements and introducing differing levels of spherical aberration. I have no idea what affect a lateral shift of the lens elements might have though.
Your thoughts would be appreciated please. Is this lateral shift modification worth doing and what effects might it have?
Thanks in advance.
Roger
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