Mamiya 7 43mm lens shutter blades in pic?

[Avotius]

Got a problem with my Mamiya 7's 43mm lens it would seem.

I think it might be the shutter being wonky? I got 6 rolls of film with the same dark corners, the other lenses I got are fine. I looked inside the camera and there is nothing in the way of the back element to the film plate and the aperture blades seem to be fine as well.

If this is a slow leaf shutter, what is the remedy? Need to send it it somewhere? Where?

Sigh...this is what we get for neglecting our film cameras......🙄

 

[thegman]

Just wondering, if you fire the shutter, can you actually see the shutter sticking? For it to be that dark at the corners, the shutter would probably have to stay there for a perceptible amount of time. Other than that, I don't know, but you could send a picture to Mamiya, chances are if you've got this problem, someone else has too and they've seen it before.

 

[Sejanus.Aelianus]

Stupid question time: this isn't lens hood vignetting, is it?

 

[sevo]

Got a problem with my Mamiya 7's 43mm lens it would seem.

I think it might be the shutter being wonky? (...)

If this is a slow leaf shutter,

Whatever it is, it won't be the shutter - the shutter is right next to the aperture, and like broken aperture blades, shutter blade errors will affect the entire picture uniformly. The lens would be too slow (or, rarely, too fast), and show an asymmetric bokeh in the highlights.

Unless the lens has been disassembled and put together in the wrong order, changing its optical properties, there must be something further up or down the axis getting into the path of light. Are you using the wrong hood? Does the 43mm have some kind of rear baffle or mask, and is that properly positioned and aligned? Is there something misplaced or missing inside the camera?

 

[Dwig]

Whatever it is, it won't be the shutter - the shutter is right next to the aperture, and like broken aperture blades, shutter blade errors will affect the entire picture uniformly. The lens would be too slow (or, rarely, too fast), and show an asymmetric bokeh in the highlights.

Unless the lens has been disassembled and put together in the wrong order, changing its optical properties, there must be something further up or down the axis getting into the path of light. Are you using the wrong hood? Does the 43mm have some kind of rear baffle or mask, and is that properly positioned and aligned? Is there something misplaced or missing inside the camera?

+1 ... It's definitely not the shutter blades or iris. It's something further in front or behind.

 

[Avotius]

I will have to take a closer look at the lens and camera. Since this problem doesn't pop up with other lenses I tend to think its not the camera body.

 

[PhotoMat]

Looks like the bayonet lens hood of the 43mm isn't fully rotated/locked in place.

 

[sevres_babylone]

I had a similar issue with my 43mm in Cuba, and afterwards determined that I had put the hood on wrong on that occasion. No problem since.

 

[Avotius]

I looked at the back of the lens and did not find anything wrong. I took to lens hood off and shot a roll and the problem is still there. Looking through the lens while its mounted on the camera and the shutter open I dont see anything in the optical path...

I am totally confused now!

Where might one send a lens like this to be checked out?

 

[sevo]

I looked at the back of the lens and did not find anything wrong. I took to lens hood off and shot a roll and the problem is still there. Looking through the lens while its mounted on the camera and the shutter open I dont see anything in the optical path...

Not even when looking from the very edges of the frame?

 

[Tadhgo]

I seem to have the same problem. I developed a roll of film today and noticed that the top left of all the frames have the same dark corner.
Same set up, shot with Mamiya 7 and 43mm lens.
Did you find out what was wrong?

 

[StoneNYC]

Have you checked where your hands hold the lens? Could be your handholding? I know it's silly but it's not uniform...

Or bad stock of film? But it's only in the edges... Hmm...

Perhaps the back isn't rotated to the proper film type (ie you're shooting 220 and have it set to 120) causing the film to curl and pull away from the plane of focus and in darker images this happens?

Could be a ghost.

Also what film is that? Is that ektachrome? I like the blue light effect 🙂

~Stone~ The Noteworthy Ones - Mamiya: 7 II, RZ67 Pro II / Canon: 1V, AE-1 / Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic. Sent from my iPhone using Forum Runner

 

[rpsawin]

I looked at the back of the lens and did not find anything wrong. I took to lens hood off and shot a roll and the problem is still there. Looking through the lens while its mounted on the camera and the shutter open I dont see anything in the optical path...

I am totally confused now!

Where might one send a lens like this to be checked out?

Try these guys...top notch.

Best regards,

Bob

http://www.precisioncameraworks.com/

 

[Tadhgo]

I had the exact same problem but it fixed itself, I'm pretty sure the pressure plate for using 120 or 220 was a bit crooked while i was shooting.