Quote Originally Posted by xya View Post
I have the mp-4 user manual in front of me and it shows a mp-4 shutter with diaphragm set-up from 4.5 to 32. I have my mp-4 stowed away but I'm quite sure that I have several of theses shutters. please have a look http://www.cameramanuals.org/pdf_fil...oid_mp-4-1.pdf page 7

you have to have the corresponding lenses of course as the blades are in the lens. maybe it's mesleading a bit.
xya, thanks for the reply. Please read the second part of the user manual, which is here: http://www.butkus.org/chinon/polaroi...aroid_mp-4.htm Go to p. 25, which states explicitly that the lens' diaphragm control ring is used to set the aperture.

The aperture control you pointed out is used to adjust the lens' aperture when the lens is mounted behind the shutter using the Reduction Kit. You'll have to scroll down the document to find this text.

Haste makes waste. Or something.