Kalart for longer lenses - Earlier model?

[ethics_gradient]

I read somewhere that the earlier models of Kalart rangefinder (the silver ones with pointy corners) can be used with longer lenses than the later model. I have the latter on my Pacemaker, and it seems to top out around 7". Does anyone have experiences with the earlier model RF's?

[Michael Roberts]

I've never run across this. I'd be very surprised if they all could not be calibrated to the 203 ektar and optar lenses, but perhaps no longer than that.

[Jim Noel]

The longest I ever calibrated was a 250mm. It probably could be done for a 300mm, but that length will not focus very close because of limited bellows draw.

[ethics_gradient]

Thanks for the responses!

Jim, do you think a telephoto design would be more viable for a 300mm?