Hasselblad V lens Stuck on Fotodiax Pro GFX Adapter

CameraQuest

CameraQuest

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I was so excited, I was going to use my Hassy Lenses on my GFX

So I mount a 50/4 CF Distagon on the adapter.

It goes on fine. But that was the end of fine.

The lens stuck on the adapter, refusing to unmount,
I push the release button and try to unmount the lens
but the lens is locked into its mount and will not budge.

So far I have found no way to adjust the aperture. Shutter set on F, aperture ring will not move.

-- the adapter ships without instructions --

does anyone know how to unmount the stuck lens
or adjust the aperture ?

-- The good news is that the combined Fotodiax adapter and Hasselblad lens are big enough to be a good door stop
 
CameraQuest said:
-- The good news is that the combined Fotodiax adapter and Hasselblad lens are big enough to be a good door stop
Click to expand...

I use all my useless gear as a door stop.

DoorstopS-1_zpssky6tdhh.jpg
 
I don't have a fotodiox adapter for my hassy lenses, so I'm just guessing. Is the button supposed to be pressed straight down, or to one side? I can remember being fooled by a button that wasn't made to go in the direction that I thought it should. Like, forward and back rather than side to side, for instance.
 
It almost sounds as though the lens shutter tripped and is partially open or the slotted shaft that coupled with the V body to cock the lens may have hung on some part of the adapter. Did thexlens shutter fire when you mated it with the adapter or sometime on the camera? I know that there's a sequence to mounting the V lenses on extension tubes and removing them from the body with an extension tube. I rarely use extension tubes with mine and have to look it up every time but I seem to remember you put the tube on the body and then mount the lens. Removing it you remove the lens and then the tube from the body otherwise you get a major jammed body.

Is there a coupling on the adapter that mates to the slotted cocking shaft? Was the lens cockedcwhen you mounted it?

If all fails David Odess is the repair expert on Hasselblad.
 
The first rule of Hasselbladery is to NEVER attach an extension tube directly to a lens or remove a lens from the camera with an extension tube attached to the lens (tube must stay on body). Doing so will trigger the lens shutter as the tube has a pin that arms the shutter. The lens depends on resting on the rotating shaft that is on the camera body to not trigger prematurely. It is possible to manually wind a lens-tube combination should one get a premature triggering - this is done with a screwdriver like device. You might have something like this on your adapter. Need detailed pix.
 
The two posts above are exactly true for an adapter that mates the lens to a Hasselblad body. But since the non-Hasselblad body has no way to trip the shutter, would the Fotodiox adapter still have the same linkages as a standard Hasselblad adapter? In other words, do the usual rules still apply here?
 
The 50 CF lens functioned correctly on the 500CM. I removed the lens from a 500 CM. The lens shutter was wide open and set on F rather than a shutter speed.

the adapter has no mechanical connection to the lens other than the lens mount.

it appears to be designed to function with the leaf shutter open, and then using the GFX shutter.

I guessed there was some way to control the aperture with the shutter wide open. Perhaps I am missing something, but the CF lens that I have attached to the adapter at the moment does not appear to allow me to change the aperture. The aperture does not move.

For some reason the shutter closed in my struggles to remove the lens. I used a screw driver to turn the screw on the back of the lens to reopen the lens shutter.

The chrome lens release appears to only be capable of pushing in, no other direction possible. Pushing the button in does not allow me to turn the lens mount so I can remove the shutter.

Its an interesting problem. Is the adapter broken or am I just doing something wrong?

If the Fotodiox Pro HB to GFX lens adapter does not allow the photog to control lens aperture, I don't see much use in it.

Stephen
 
Is the EV cross-coupling button stuck down? That would lock the aperture when the shutter is in the F position. Also, what happens if you take it off of F? Does that free anything up?
 
Rob-F said:
Is the EV cross-coupling button stuck down? That would lock the aperture when the shutter is in the F position. Also, what happens if you take it off of F? Does that free anything up?
Click to expand...

Thanks Rob,

I was never the best Hassy shooter, forgot about the cross coupling button.

OK, lens aperture can now be controlled. Even stopped down at F22 the viewfinder is relatively bright!

Still, the lens is stuck on the adapter, at every shutter speed, at every f stop.
 
CameraQuest said:
OK, lens aperture can now be controlled. Even stopped down at F22 the viewfinder is relatively bright!
Click to expand...

Well, the iris does not really stop down until you use the DOF stop-down control, which should probably just be left in the stop-down position as long as you are using it on the GFX.

Did you take it off of F?
 
There's a little pin next to the cocking shaft that triggers the shutter when on the camera. If nothing is pressing on that pin then my guess is you have a shutter issue.

As far as the lens not releasing from the adapter it sounds like the locking pin is too large and stuck in the notch that it fits in to lock the lens in the mount. I'm guessing the tolerances of the adapter are a little sloppy. Can you put a tiny drop of oil on that pin and locking notch? Just a tiny bit on a toothpick. It might help it free up.
 
x-ray said:
There's a little pin next to the cocking shaft that triggers the shutter when on the camera. If nothing is pressing on that pin then my guess is you have a shutter issue.

As far as the lens not releasing from the adapter it sounds like the locking pin is too large and stuck in the notch that it fits in to lock the lens in the mount. I'm guessing the tolerances of the adapter are a little sloppy. Can you put a tiny drop of oil on that pin and locking notch? Just a tiny bit on a toothpick. It might help it free up.
Click to expand...

the adapter only contacts the lens mount, nothing else on the back of the lens. so the shutter may be acting up by itself to repeatedly close down.

The shutter speeds can be changed, seems to make no difference in removing the lens.

I'll take the adapter and lens to a tech tomorrow. Worst case the lens mounting ring on the adapter appears removable, held in place by four tiny screws.

Thanks to all for your thoughts!
 
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