I use a 47mm S-A XL on my Tech V with a Chinese-made lensboard and built-in helical. I'm sure there are much fancier helicals with better finish and smoother focusing mechanisms, but the helical I have works properly, seems properly aligned to the extent that I can focus with my own eyes and a loupe, and wasn't extraordinarily costly (around $150 in 2010). It even has a custom engraved focus scale, though it depends on manually focusing the standard to infinity using a loupe on the groundglass first, since there is no room for infinity stops on the inner rails of a Technika. It's not so easy to read the scale inside the box anyway, so I don't really use it.
Great solution. Excellent for 4X5 Crown Graphics as well. Thanks!
There is no need to modify the camera. Dropping the bed two stops works fine for horizontals. Depending on where the lens is, it might clip for verticals, but you can also just turn the camera 90 degrees.
The Wideangle Focusing Device is good for 55mm and 65mm lenses (or thereabouts). Lenses in the 72-75mm range can just use a recessed lensboard without the extra device.
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