Paul Kinzer
30-Mar-2017, 18:22
This is my first post here, though I've been reading for a long time.
I received this lens in the mail today. I want to use it on my 2x3 Speed Graphic with a tube extension on the board. I actually already have one already put together, but the glass was in pretty bad shape, so I got this one when it came up on eBay.
But when it arrived, I noticed a problem. The diaphragm wouldn't close down all the way to f/32, and when I opened it all the way, the indicator arrow read f/6.3. I removed the set screw from the aperture ring and removed the ring. I found that the set screw goes right into the diaphragm and functions as a peg to open and close the iris when the aperture ring is turned. I figured this was the way it would be. The probelm seems to be that the entire diaphrgm mechanism has some how turned with in the lens barrel, so that when the ring is turned in one direction, its motion is stopped on one end by the aperture opening all the way, and at the other end by the peg reaching the end of the slot along which it travels as the ring is turned.
I went to check the photos in the ad for the lens, and one clearly shows that the indicator arrow is lined up with the setting for f/4.5. So somehow between when that photo was taken and when the lens arrived to me, the diaphragm moved. But now it won't move back. I tried inserting a tiny screwdriver into the hole the set screw is meant to be inserted into, and then at an angle pushed in the direction the diaphragm needed to go in order for it to be where it belonged. It doesn't want to budge. I don't want to risk breaking it, so stopped to get some help, which I hope someone here can give me.
Another issue is that the front cell does not want to unscrew. If I could get it off, then I would just use the iris from my other lens (even though the paint is in better shape and the numbers are easier to read on the 'new' one). Both cells on the old lens unscrew easily. The new iris also has a fair amount of oil on it, which I would like to remove, but don't want to try with the glass still there.
I didn't pay much for this lens (so little that it's not really worth the return shipping cost), so I'm willing to take risks with it. But the glass is quite nice, so I wouldn't want to wreck it either.
I'd be grateful for any suggestions.
(I tried uploading a photo of the lens by following the instructions on the guidelines page, but the little loading icon just kept spinning for more than a minute, so I gave up. The jpeg file was only 750 pixels on the long side, and less than 200 Kb. Is there something I should know?)
163282
I received this lens in the mail today. I want to use it on my 2x3 Speed Graphic with a tube extension on the board. I actually already have one already put together, but the glass was in pretty bad shape, so I got this one when it came up on eBay.
But when it arrived, I noticed a problem. The diaphragm wouldn't close down all the way to f/32, and when I opened it all the way, the indicator arrow read f/6.3. I removed the set screw from the aperture ring and removed the ring. I found that the set screw goes right into the diaphragm and functions as a peg to open and close the iris when the aperture ring is turned. I figured this was the way it would be. The probelm seems to be that the entire diaphrgm mechanism has some how turned with in the lens barrel, so that when the ring is turned in one direction, its motion is stopped on one end by the aperture opening all the way, and at the other end by the peg reaching the end of the slot along which it travels as the ring is turned.
I went to check the photos in the ad for the lens, and one clearly shows that the indicator arrow is lined up with the setting for f/4.5. So somehow between when that photo was taken and when the lens arrived to me, the diaphragm moved. But now it won't move back. I tried inserting a tiny screwdriver into the hole the set screw is meant to be inserted into, and then at an angle pushed in the direction the diaphragm needed to go in order for it to be where it belonged. It doesn't want to budge. I don't want to risk breaking it, so stopped to get some help, which I hope someone here can give me.
Another issue is that the front cell does not want to unscrew. If I could get it off, then I would just use the iris from my other lens (even though the paint is in better shape and the numbers are easier to read on the 'new' one). Both cells on the old lens unscrew easily. The new iris also has a fair amount of oil on it, which I would like to remove, but don't want to try with the glass still there.
I didn't pay much for this lens (so little that it's not really worth the return shipping cost), so I'm willing to take risks with it. But the glass is quite nice, so I wouldn't want to wreck it either.
I'd be grateful for any suggestions.
(I tried uploading a photo of the lens by following the instructions on the guidelines page, but the little loading icon just kept spinning for more than a minute, so I gave up. The jpeg file was only 750 pixels on the long side, and less than 200 Kb. Is there something I should know?)
163282