Mamiya 7 80mm lens

[cliff whittem]

Hi,
I have just purchased a Mamiya 7ii and 80mm lens.All is well but i notice that the lens aperture blades are not TOTALLY open when set to its maximun f/4 aperture.
Hopefully this is normal and i am worrying about nothing.Perhaps someone could put my mind at rest as the camera looks marvellous to me so far in all other respects.
Many thanks
Cliff

 

[Hates_]

I'll check mine when I get home and let you know.

 

[Hates_]

It's hard to tell what you mean by not totally open. If I set mine to F4 I can see a small outline from the blades, and if I move the ring a bit past F4 it opens up a tiny bit more to pretty much fully open.

 

[john_s]

I've had a look at mine, and at full aperture it's possible to see a tiny part of the five aperture blades through the front or the back of the lens.

 

[Atom]

It is normal to see the edges of the aperture blades when it is open to f4. This has always been the case with my 80 which I purchased new some years ago. I've tested the exposure against other cameras at f4 and have always observed equivalence. Don't worry about it.

 

[cliff whittem]

.Mamiya 7 80mm aperture blades

.Mamiya 7 80mm aperture blades

Hi all;
As it appears that you can all see the aperture blades slightly , as on my lens ,you have put my mind at rest.I was a bit worried that my lens was not fully opening to f/4.
On testing the lens i find its performance really outstanding. And this from someone who has used most medium format sytems over many years.
Thanks again for your help and comments,Cliff

 

[Hates_]

The Mamiya lenses on the 7 are just spectacular IMHO.