Be careful with your Chamonix lens board locking tabs

[Paul Droluk]

I've used Linhof and Wista boards as well as copies, and in my case all of the boards are TOO THIN. I have to back them with felt, a time consuming fix which likely won't work for the long term.

[marduk]

I've used Linhof and Wista boards as well as copies, and in my case all of the boards are TOO THIN. I have to back them with felt, a time consuming fix which likely won't work for the long term.

It seems like there's some variation in the allowed lensboard thickness between the Chamonix production batches. Mine #588 works best with thin Wista and Shen-Hao boards (of the composite material variety). Of the three Shen-Hao (aluminium alloy variety) lensboards that I have bought recently two boards fit although it takes some effort to lock and unlock it. Third one doesn't fit - but I don't see any tangible thickness differences between them. They are all almost 2mm thick (I don't have the caliper to measure it precisely). I also inquired about Bromwell lensboards and Ted Bromwell replied that his lensboards are designed 2.0mm thick (which means they probably wouldn't fit my Chamonix) and the Linhof boards are 2.0-2.2mm thick.