enzodm
Joined: 11 Sep 2010
Posts: 350
Location: Italy
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 Posted: Sat Sep 11, 2010 6:24 am Post subject: Beroflex 135/2.8 with slow blades... |
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enzodm wrote:
Hi,
first post here for me, recently biten by manual focus lenses virus.
I just bought a Beroflex 135/2.8, which I learned (before buying) that is just one brand of some lenses made from Cosina or others. It is not the same as in the review on MFlenses: filters thread is 55mm.
Anyway, the copy I received is nice, perhaps little used, but blades are slow in movement and not closing completely (I calculated more or less up to f/11).
At eye exam, three blades appear oiled. Movement is smooth (too smoth, actually).
While I think I'll not need much f/22, if not difficult I would try to clean it. Any direction? Searching for Beroflex disassembly instructions did not give results, but I'm sure there is some identical lens with different name around.
An additional question:close to mount there is a sort of lever, blocked by a screw (visible in picture, bottom right). Do you know what is it? As the mount seems to have electrical contacts, I suspect has something to do with them.
picture
(EDIT: no way of putting a picture here? I hope the text description is sufficient...)
Thank you very much (for these questions but also for the others answers I found before subscribing  ) |
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indianadinos
Joined: 06 Jul 2008
Posts: 1310
Location: Toulouse, France
Expire: 2011-12-05
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| Posted: Sat Sep 11, 2010 8:04 am Post subject: |
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indianadinos wrote:
Hello,
At first, welcome to the forum and enjoy your stay ...
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(EDIT: no way of putting a picture here? I hope the text description is sufficient...)
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This is the forum policy for new members, you must post at least two messages ...
Here is your picture ...
Beroflex 135/2.8 by vdm, on Flickr
Cheers
P.S.: You should grab the BBCode link from Flickr, instead of the HTML one ...
_________________
Please visit my blogs Shooting with a Pentax K10D / FF Visions
Takumar: 24/3.5, 28/3.5, 35/2, 35/3.5, 50/1.4, 55/1.8, 85/1.8, 105/2.8, 120/2.8, 135/3.5, 150/4, 200/4
Pentax-K: M28/2.8, K28/3.5, M50/1.4, A50/1.7, M50/4 Macro, K85/1.8, K105/2.8, K135/2.5, M200/4, M70-150/4
Zeiss: Flektogon 20/2.8, 20/4, 35/2.4, 35/2.8, Tessar 50/2.8, Pancolar 50/1.8, Biotar 58/2, Sonnar 135/3.5, Sonnar 180/2.8
Meyer: Primagon 35/4.5, Domiplan 50/2.8, Oreston 50/1.8, Primoplan 58/1.9, Trioplan 100/2.8, Orestor 100/2.8, Orestor 135/2.8
Schacht/Steinheil: Travenar 90/2.8, Travenon 135/4.5, Quinar 135/2.8, Quinar 135/3.5
Russian: MIR 37B, Industar 50/3.5, Helios 44M & 44M-2, Jupiter 37A
P6: Flektogon 50/4, Biometar 80/2.8, Orestor 300/4
Nikkor: Nikkor-O 35/2, Micro 55/3.5, Nikkor-S 50/1.4, Nikkor-Q 135/2.8
Fuji: EBC 28/3.5, EBC 55/3.5 Macro, EBC 135/2.5
Misc Lenses: Kiron 105/2.8 Macro, Tamron SP90/2.5
... and a few other Vivitar, Tamron, Sigma and Soligor lenses ...
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enzodm
Joined: 11 Sep 2010
Posts: 350
Location: Italy
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| Posted: Sat Sep 11, 2010 12:12 pm Post subject: |
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enzodm wrote:
Thank you indianadinos, I supposed something similar; I also tried every combination, BBcode, HTML, handwriting... but this is the second post, so since now I should be ok.
In the meantime, my moving and moving diaphragm (and also shaking), I was able to close more and make it snappier (not yet fully reliable). By the way, shaking also helped me to discover the integrated lens hood  . |
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