Post by Stephen on Apr 26, 2013 8:01:09 GMT -5
Acquired for no actual cash, free in return for threading a shaft in the workshop for a neighbour, a F2 17mm-200mm C Mount Zoom lens.
I have shied away from buying these ex-TV lenses, they are sometimes incapable of covering the image sensor in 4/3 cameras like the OM Pen series, at the wide end. Also may have electric motor driven irises or focus etc.,
This one is a bit different, it has a C mount, but a smaller back surround, so easier to mount on the micro 4/3 adaptors.
The range on 4/3 would be doubled to 34mm to 400mm equivalent in 35mm terms, at F2.
It has an auto electric diaphragm, with a lead, but has a nice manual override knob, which adjusts the iris from F2 to F22, then complete closure. The lead and plug can be removed and the hole left, fitted with a rubber plug grommet.
There is no maker marked, just made in Japan, but it resembles a Pentax TV camera lens on the net. Pentax had a factory that specialised in making these C mount lenses, and they were often un-branded, with just a sticker for the camera maker being added. The other possible maker is Fuji.
It is in good optical condition, all controls work very smoothly indeed, it has a bit of external corrosion to the black finish on the aperture housing, but it will clean up nicely and can be re-sprayed satin black.
It will need testing on a C mount converter, and of course I can't find mine anywhere, so ordered a new spare one!! ...in the meantime a clean up and some shots of it, and a quick temporary mount made to test it.
Stephen.
I have shied away from buying these ex-TV lenses, they are sometimes incapable of covering the image sensor in 4/3 cameras like the OM Pen series, at the wide end. Also may have electric motor driven irises or focus etc.,
This one is a bit different, it has a C mount, but a smaller back surround, so easier to mount on the micro 4/3 adaptors.
The range on 4/3 would be doubled to 34mm to 400mm equivalent in 35mm terms, at F2.
It has an auto electric diaphragm, with a lead, but has a nice manual override knob, which adjusts the iris from F2 to F22, then complete closure. The lead and plug can be removed and the hole left, fitted with a rubber plug grommet.
There is no maker marked, just made in Japan, but it resembles a Pentax TV camera lens on the net. Pentax had a factory that specialised in making these C mount lenses, and they were often un-branded, with just a sticker for the camera maker being added. The other possible maker is Fuji.
It is in good optical condition, all controls work very smoothly indeed, it has a bit of external corrosion to the black finish on the aperture housing, but it will clean up nicely and can be re-sprayed satin black.
It will need testing on a C mount converter, and of course I can't find mine anywhere, so ordered a new spare one!! ...in the meantime a clean up and some shots of it, and a quick temporary mount made to test it.
Stephen.
