A restriction! I see... ;)
But even with that restriction: the latest (and probably last) 40 mm Distagon has floating elements that are moved when you use the normal focussing ring.
Holy thread revival!
I figured ( again) that i would add to this info, instead of starting my own... I just picked up a 65mm KL for my RZ... a few questions:
1) regarding the Floating system... actually regarding figuring out "focused distance" On a the longer lenses, ( like my 180) the Distance Scale on the camera body seems easy to understand, as the red and blue lines continue on underneath the the numerical values printed on the, making it easy to see which number they came closest to ( or so i thought! ) Now using the 65mm, the blue line for the 65mm lens comes nowhere near the numbers. This tells me i am doing something wrong here. But what.
2) secondly, i assume when using the RB lens on the RZ body, the shutter speed ring on the lens itself over-rides the shutter speed knob on the RZ body? Seems thats the case anyway. ?
3) i assume adjustments of the floating lens ring are invisible thru the finder.... much like depth of field being invisible to the finder, but real on the film nonetheless.... correct?
no one wanna take a crack at this? ... ^
1.) What's probably throwing you off is that you're using an RB lens on a RZ camera. RB lenses require a bit more focus extension on the RZ camera to reach infinity focus. As the chart on the side of the camera is figured for RZ lenses, it won't match up with a RB lens.
2.) Yes -- the RB lenses are completely mechanical, and have no electrical contacts with the RZ body. The shutter speed dial on the RZ won't do a thing because there is no way for it to control a RB lens. It's best to set the dial on the camera to "RBL" (if I remember right this turns off the body/lens electronics) when you have a RB lens on the RZ.
3.) I've never been able to see the floating lens adjustments on my 65mm while looking through the camera, but I can tell you they do show up on the film!
Danny, thanks! that helps a ton.... so i will have to guess on my distances i assume.
do i take it to mean that ALL Mamiya rb67 50mm and 65mm lenses use the floating element design irrespective of whether they are non c or c series ?
If you look closely while adjusting the element the focus shift is visible. Watch the background. It's sorta like the Nikor 135mm SF
With a little practice it becomes natural to adjust correction and then focus the image
And with a little practice also, Zeiss managed to put a 'linked' FLE and shutter assembly in a helicoid focussing lens too. See the latest incarnation of their Hasselblad 40 mm Distagon. ;)