Nick Ahlgrim
4-Jun-2011, 20:14
I bought a box of lenses for $19 and have two from the box that I cannot find out what they are from. Most of the lenses look like they are for some industrial purpose.
The first one is a Topcon 280mm. The front element is about 73mm and is coated, rear element is about 39mm and is also coated. The rear mounting thread is 52mm and the lens is about 42mm long. First I put it on my 4x5 and it made a nice sharp looking image. Then I wanted to see how big of an image it make, since it looks far too large for a 4x5. It ended up projecting a very sharp large image onto white poster board (around 15x20" from about 13in away.) I don't have a Ulf yet, so I had to do it outside looking into my lit up room through the curtains.
I cant find anything about this lens online. Thinking it probably had some industrial use, but I have no idea what.
The second one says "Made in Germany" and I don't know the focal length yet. It also made a really nice looking image on my 4x5. Its smaller then the Topcon. Front element is about 29mm and the rear is 27mm. The barrel has a diameter of 47mm and is 41mm long. Rear threads are 43mm.
Hoping someone on here knows somethings about either of these lenses. The Topcon looks real nice and I would love for it to turn out to be a good lens.
Any help is appreciated.
http://i1120.photobucket.com/albums/l486/Calphotocollect/lenses1.jpg
http://i1120.photobucket.com/albums/l486/Calphotocollect/lenses2.jpg
http://i1120.photobucket.com/albums/l486/Calphotocollect/lenses4.jpg
http://i1120.photobucket.com/albums/l486/Calphotocollect/lenses6.jpg
The first one is a Topcon 280mm. The front element is about 73mm and is coated, rear element is about 39mm and is also coated. The rear mounting thread is 52mm and the lens is about 42mm long. First I put it on my 4x5 and it made a nice sharp looking image. Then I wanted to see how big of an image it make, since it looks far too large for a 4x5. It ended up projecting a very sharp large image onto white poster board (around 15x20" from about 13in away.) I don't have a Ulf yet, so I had to do it outside looking into my lit up room through the curtains.
I cant find anything about this lens online. Thinking it probably had some industrial use, but I have no idea what.
The second one says "Made in Germany" and I don't know the focal length yet. It also made a really nice looking image on my 4x5. Its smaller then the Topcon. Front element is about 29mm and the rear is 27mm. The barrel has a diameter of 47mm and is 41mm long. Rear threads are 43mm.
Hoping someone on here knows somethings about either of these lenses. The Topcon looks real nice and I would love for it to turn out to be a good lens.
Any help is appreciated.
http://i1120.photobucket.com/albums/l486/Calphotocollect/lenses1.jpg
http://i1120.photobucket.com/albums/l486/Calphotocollect/lenses2.jpg
http://i1120.photobucket.com/albums/l486/Calphotocollect/lenses4.jpg
http://i1120.photobucket.com/albums/l486/Calphotocollect/lenses6.jpg