PF Holiday Loyal Site Supporter Special | December Pentax Lens Tournament

opfor · 03-15-2011, 06:46 AM

I went to a second hand shop this morning to look at a 645 with a couple of A lenses. The problem was that none of the blades moved with the aperture rings. Other than that, everything looked fair to fine.
How much of a major event would be it to get a 645 and three or four lenses cleaned and serviced?
Let's face it, I'm cheap. I don't want to gamble a lot to experiment with medium format if it's going end up costing more than the equipment is worth.

Smolk · 03-15-2011, 11:52 AM

Not sure what you mean - you can move the blades by the little lever in the bayonet mount. As it is automatic diaphragm, they will not stop down when you move the diaphragm ring.
If they do not move by that lever (there are two levers btw, don't try to move the one which does not "want" to), I would only buy them very very cheaply. Or not. Probably not. Unless you've got golden fingers.

opfor · 03-15-2011, 12:02 PM

My mistake then. I thought they should act like my regular A lenses. I didn't know that the aperture ring wouldn't move the blades. What a strange design?
I'll have to go check them again....

Smolk · 03-15-2011, 12:15 PM

What you can move in the bayonet is the blades, while if you move the aperture ring the other lever should move.

opfor · 03-15-2011, 12:50 PM

Thanks for the info.

03-15-2011, 06:46 AM	#1
opfor Senior Member Join Date: Dec 2008 Location: Oxford, UK Photos: Albums Posts: 276	Stuck Blades I went to a second hand shop this morning to look at a 645 with a couple of A lenses. The problem was that none of the blades moved with the aperture rings. Other than that, everything looked fair to fine. How much of a major event would be it to get a 645 and three or four lenses cleaned and serviced? Let's face it, I'm cheap. I don't want to gamble a lot to experiment with medium format if it's going end up costing more than the equipment is worth.

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03-15-2011, 11:52 AM	#2
Smolk Pentaxian Join Date: Feb 2010 Location: Rotterdam, NL Photos: Albums Posts: 843	Not sure what you mean - you can move the blades by the little lever in the bayonet mount. As it is automatic diaphragm, they will not stop down when you move the diaphragm ring. If they do not move by that lever (there are two levers btw, don't try to move the one which does not "want" to), I would only buy them very very cheaply. Or not. Probably not. Unless you've got golden fingers.

03-15-2011, 12:02 PM	#3
opfor Senior Member Join Date: Dec 2008 Location: Oxford, UK Photos: Albums Posts: 276 Original Poster	My mistake then. I thought they should act like my regular A lenses. I didn't know that the aperture ring wouldn't move the blades. What a strange design? I'll have to go check them again....

03-15-2011, 12:15 PM	#4
Smolk Pentaxian Join Date: Feb 2010 Location: Rotterdam, NL Photos: Albums Posts: 843	What you can move in the bayonet is the blades, while if you move the aperture ring the other lever should move.

03-15-2011, 12:50 PM	#5
opfor Senior Member Join Date: Dec 2008 Location: Oxford, UK Photos: Albums Posts: 276 Original Poster	Thanks for the info.

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PF Holiday Loyal Site Supporter Special | December Pentax Lens Tournament