imperial 200mm lens info

[caila77]

I've a lens exactly like the one you can see here

Tele Imperial 4,5 / 200 mm Prime Objektiv Tele Lens M42 Mount n15b | eBay

Blenden defekt. Anschluss /Mount : M42.

www.ebay.de

the lens has an adapter ring at the base that allows it to be mounted on cameras with an M42 bayonet. The only problem I encounter is that there is no mechanism that closes the diaphragm to the set value nor is there any mechanism on the back of the lens. I can imagine it being a special purpose lens.

 

[petronius]

The shown lens has a ring marked O-C above the aperture ring which closes the aperture to the value you set on the aperture ring.

 

[caila77]

The shown lens has a ring marked O-C above the aperture ring which closes the aperture to the value you set on the aperture ring.

No, it does not work …. Maybe it is broker?

 

[mdarnton]

The description says "blades not working" so yes, as described it is broken.

 

[caila77]

The description says "blades not working" so yes, as described it is broken.

I’ve a Lens like the one in the link, not the one in the link

 

[Cascadilla]

This looks like an old pre set T mount lens--you manually stop down the lens just prior to taking the picture. The T mounts could be changed to a variety of camera mounts and since there was no diaphragm automation these could function on many different cameras. When I used SLRs with stop down metering, I would focus and compose and then take a meter reading and click the shutter. After taking the picture, I would then open the diaphragm to set up for the next one. Since these lenses were mechanically much simpler than auto diaphragm models they were correspondingly cheaper.

 

[petronius]

No, it does not work …. Maybe it is broker?

I have some similar lenses in which the front tube can be unscrewed to have a closer look at the O - C mechanism.