Toyo 45AII to Toyo 45CG Adapter Lens Board Selection : LUSENET : Large format photography : One Thread

I am using the 72XL and 90/f8 wide angle lenses each with the Toyo 12.5mm recessed 110mm square boards and also a 210/5.6 on the flat 110mm square lens board on my Toyo 45AII field camera.

I would like to use these lenses interchangeably on my 45C without the hassle of removing them from the lens boards listed just to mount them on the 158mm squarelens board my Toyo 45C uses.

Therefore I would like to get just one of the two types of adapter lens board Toyo makes for this purpose. I wish this choice to work with all three lenses as mounted above witout restriction, if possible. The two types of converter boards I am refering to are the recessed or flat converter type.

My first guess is that the recessed type converter (ie, the 158mm board that is fully recessed and couples with one of the smaller 110mm board)is more versatile, but I wonder if the 12.5mm recess from the 110mm square lens boards I am already using with the 45AII, added to the 38mm? or so recess of the 158mm converter board is somehow going to then recess the wide angle lenses so much to either cause vignetting with the front standards of the 45C or possibly to put the rear element of the wide angle lenses too close to the ground glass? (Not having any experience of using a wide angle with bag bellows on a momorail, the latter may be a universal concern - I don't know.

So my question is: With these considerations, which 110mm to 158mm Toyo converter lens board do you recommend, either the flat one or recessed one? Thanks very much for your help. Andre

-- Andre Noble (, October 28, 2001

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