Hasselblad 3.5/100 aperture problem

[Frigge]

My Hasselblad 100mm f3.5 Planar C is not my friend right now;
The aperture won't open up after exposure -- it stays stopped down to whatever I've set it to. I can open it manually with the aperture ring, but after the next exposure it's the same problem again.
My guess is that the DOF-switch is stuck.

Is it an advanced and expensive repair? Or is there some simple trick I can do myself without breaking anything?

 

[Sirius Glass]

A Hasselblad repair person can tell you in a few minutes. Most will fix the problem and then check out the rest of the functions. A CLA or complete overhaul is only recommended if it is needed.

 

[chuckroast]

My Hasselblad 100mm f3.5 Planar C is not my friend right now;
The aperture won't open up after exposure -- it stays stopped down to whatever I've set it to. I can open it manually with the aperture ring, but after the next exposure it's the same problem again.
My guess is that the DOF-switch is stuck.

Is it an advanced and expensive repair? Or is there some simple trick I can do myself without breaking anything?

try running a TINY drop of naptha (lighter fluid) down by the DOF switch and working the switch a few times. Don't flood it...

you might use a pipe cleaner to do this

 

[Frigge]

Thank you for your informative answers!

Hopefully a simple fix then, I might try naphta in a syringe and if that doesn't do it, the lens goes to a repair shop!

 

[chuckroast]

Thank you for your informative answers!

Hopefully a simple fix then, I might try naphta in a syringe and if that doesn't do it, the lens goes to a repair shop!

Be careful about the volume of naptha you get in there. Too much and it will run around the innards, get on the shutter or aperture blades, etc. Hence the recommendation for a TINY amount. Better to drip very small drops into the area, work the lever and repeat.

A great many camera mechanical issues are actually not so much a need for lubrication, it's a need to clean the area in question. I have fixed tons of small issues (not this particular one) with a judicious application of naptha into the right spots.

 

[Frigge]

Be careful about the volume of naptha you get in there

A tiny drop didn't do the trick. If I cock the shutter really slow, everything works. Unfortunately I use an ELX, and can't make it go slower

A qualified workshop is the next step.