GeorgesGiralt
4-Feb-2011, 09:14
Hello !
I've got this lens near free. In it's wooden bow with a set of parts that puzzle me.
There is a picture of it here : http://en.wikipedia.org/wiki/File:ApoNIKKOR240.jpg
As you can see there is a silver colored lever on a ring above the stops markings.
This lever opens a gate in the lens barrel and on this gate one can put something looking like filter holder (for Kodak gelatin filters I think) and/or one of what seems to be a F-stop of very small value (the hole in it is less than a millimeter diameter).
I wonder what use one can put to these contraptions ? and what effect they may have on the lens's performance ?
Also, I would be glad to get more information on Nikon process lenses if available ....
Many thanks in advance for your help !
I've got this lens near free. In it's wooden bow with a set of parts that puzzle me.
There is a picture of it here : http://en.wikipedia.org/wiki/File:ApoNIKKOR240.jpg
As you can see there is a silver colored lever on a ring above the stops markings.
This lever opens a gate in the lens barrel and on this gate one can put something looking like filter holder (for Kodak gelatin filters I think) and/or one of what seems to be a F-stop of very small value (the hole in it is less than a millimeter diameter).
I wonder what use one can put to these contraptions ? and what effect they may have on the lens's performance ?
Also, I would be glad to get more information on Nikon process lenses if available ....
Many thanks in advance for your help !