Broken shutter-aperture interlock- hasselblad distagon 50mm f4

ChrisBCS · Jun 5, 2017

Lens was an unfortunate eBay purchase: advertised as fully functional but arrived with a broken interlock. As in there is a gap between the button and barrel with a visible spring in between the barrel and button. The shutter and aperture rings are not mated. I have read that repairs on these lenses are incredibly difficult. Is there a repair technician that APUG recommends if we can't get a refund?

BrianShaw · Jun 5, 2017

There are some people who would consider that a benefit.

I like the RV interlock.

Call David Odess or Steve Choi (Steves Camera Repair) for some repair advise.

Sirius Glass · Jun 5, 2017

ChrisBCS · Jun 5, 2017

Thank you both. The lens otherwise works. Hopefully a return is easy, I'm not naive enough to think I can repair it, but I am just stupid enough for this to have me interested in the craft of repairing them and trying to figure out how to learn. The large portion of my day job is repair and maintenance on stable isotope ratio mass spectrometers, so unfortunately I have long ago lost the fear of taking expensive and delicate things apart. I'm sure I lack any tools to be particularly useful though.

Here are photos of the carnage:

mike c · Jun 5, 2017

Some Hasselblad users pay to have the coupling disengaged, which I would like but never had it done. Yours might be broken or disengaged professionally. When I say disengaged I meant the interlock between shutter and aperture are disengaged.

fdonadio · Jun 7, 2017

I know I may sound stupid, but asking won't hurt...

You are aware that CF (and newer) lenses don't have the shutter and aperture interlocked "by default", right? I mean, it's the opposite of the older C lenses, where you press the button to disengage the interlock.

It should be a simple repair, but most people here won't advise you I try it.

I do have a CF lens service manual, but never tried fixing one of those.

ChrisBCS · Jun 7, 2017

Hi fdonadio,

Yes I'm aware. It does not lock up at all with the button pressed, and the button housing is not anchored as it should be. I'm not sure what is supposed to be between the hole in the aperture ring and the button housing, but as it stands there's only a spring. If we can't return it I may take you up on the manual. As someone who takes things apart for a living, it drives me nuts to see it broken and not just dive in. The diapgragm adjust properly, the shutter functions smoothly (I have no way of assessing the time, but it appears correct by eye at the slower speeds).

John Koehrer · Jun 7, 2017

If it's "not as described" the seller has to give a refund.
I've never seen one of their lenses with a gap like that unless.
1. an internal screw backed out & is now wandering around in the shutter
2. bumped and a screw or tab on the piece has been broken off.

Broken shutter-aperture interlock- hasselblad distagon 50mm f4

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