Hasselblad Extension Tubes Destroys the Mount of the Lens?

georgeqiao · Jul 13, 2015

I purchased some hasselblad extension tubes a while back. I was beginning to use it today. However, after I put my 80mm and 120mm lenses on the tube, they can no longer lock with the camera. the little locker screw seems to have altered position that makes it no longer connect with the corresponding part on the camera.

Is there a way to fix this by myself?

Has anyone experienced similar situations?

Best,
George

Brett Rogers · Jul 13, 2015

georgeqiao said:
I purchased some hasselblad extension tubes a while back. I was beginning to use it today. However, after I put my 80mm and 120mm lenses on the tube, they can no longer lock with the camera. the little locker screw seems to have altered position that makes it no longer connect with the corresponding part on the camera.

Is there a way to fix this by myself?

Has anyone experienced similar situations?

Best,
George

User error.
Cocked tube goes on cocked body, cocked lens goes on tube. Removal is the reverse. Your lenses and tubes are fine. The problem is that you are doing exactly what they tell you not to do in the manual, when using the extension tubes.

jspillane · Jul 13, 2015

Most likely, the lenses were triggered when you were removing them from the extension ring. Only a wound lens will mount to the body. You can simply twist the screw (clockwise- I believe there is a red arrow showing the correct direction) back into place with a key or coin and it will remount. Wind gently and you should feel it 'click' back into place.

Extension tubes should cause no damage to the lenses or bodies. However, always mount the extension tube on the body, and then the lens onto the extension tube. When dismounting, always remove the lens first, then separate the extension tube and the body. If you perform the operation in any other pattern you will get grief.

Xmas · Jul 13, 2015

jspillane said:
Most likely, the lenses were triggered when you were removing them from the extension ring. Only a wound lens will mount to the body. You can simply twist the screw (clockwise- I believe there is a red arrow showing the correct direction) back into place with a key or coin and it will remount. Wind gently and you should feel it 'click' back into place.

Extension tubes should cause no damage to the lenses or bodies. However, always mount the extension tube on the body, and then the lens onto the extension tube. When dismounting, always remove the lens first, then separate the extension tube and the body. If you perform the operation in any other pattern you will get grief.

I need to use a long screwdriver to access the screw head...

bdial · Jul 13, 2015

Xmas said:
I need to use a long screwdriver to access the screw head...

Assuming the lens is off the camera, all you need is a regular screwdriver, or else a coin that fits, wind in the direction of the arrow until it stops. Make sure the body is wound as well (using the wind knob), the lens should mount perfectly.

Xmas · Jul 13, 2015

bdial said:
Assuming the lens is off the camera, all you need is a regular screwdriver, or else a coin that fits, wind in the direction of the arrow until it stops. Make sure the body is wound as well (using the wind knob), the lens should mount perfectly.

Confirmed
That gets the lens and tubes ready & a dime will do.
Then you mate the ensemble take it out to back yard shot a spider or two then it jams and you need the long screwdriver.
Then you need to send the bits of for a service.

frank · Jul 13, 2015

Brett Rogers said:
User error.
Cocked tube goes on cocked body, cocked lens goes on tube. Removal is the reverse. Your lenses and tubes are fine. The problem is that you are doing exactly what they tell you not to do in the manual, when using the extension tubes.

+ 1

bdial · Jul 13, 2015

Xmas said:
Confirmed
That gets the lens and tubes ready & a dime will do.
Then you mate the ensemble take it out to back yard shot a spider or two then it jams and you need the long screwdriver.
Then you need to send the bits of for a service.

I have yet to experience the dreaded "Hasselblad jam" they are so famous for on the internet.
Maybe 20 years of using them isn't enough though.

Or maybe I just live a sheltered life.

Douglas Fairbank · Jul 13, 2015

bdial said:
I have yet to experience the dreaded "Hasselblad jam" they are so famous for on the internet.
Maybe 20 years of using them isn't enough though.

Or maybe I just live a sheltered life.

If a Hasselblad jams it is because there may have been user error like the wrong sequence for removing the tubes or there is a fault that requires adjustment or repair. There is NO magic tool that fixes it but if you want to spend money on a screwdriver (because that is what it is) go ahead but repeated use will cause damage one day and that could be very expensive or even destroy the camera as some spare parts now are no longer available.
As the other writer said the lens must only be removed from a cocked tube still mounted on the camera. If the lenses or tubes have lost their tension, GENTLY recock them using a small coin or screwdriver but do not slip or force them, they will latch at the end of the travel, if not they are faulty.
Good luck.

georgeqiao · Jul 13, 2015

I tried with a coin to turn the screw, but it sprang back to its earlier position. I tried a number of times, but it still does not connect with the body.

Sirius Glass · Jul 13, 2015

The advice given above is good. Follow it.
1) Read the manual.
2) Now take it to a repair man.

Xmas · Jul 13, 2015

bdial said:
I have yet to experience the dreaded "Hasselblad jam" they are so famous for on the internet.
Maybe 20 years of using them isn't enough though.

Or maybe I just live a sheltered life.

Confirmed sheltered life...
More than 30 years with two bodies...
Only got one now.
Normally happens backpacking miles away from civilisation eg in bothy just as the winter sun rises...
Keep a screwdriver in gbag nowadays cheap insurance.
Lack of lube or too stiff lube... Or similar lens or extension tube...

Sirius Glass · Jul 13, 2015

See:
http://www.dmin-dmax.fr/photoe2b.htm

Hasselblad Extension Tubes Destroys the Mount of the Lens?

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