Posted: Thu Apr 26, 2018 2:26 pm Post subject: Vivitar 28-90 |
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croccodillo wrote:
Hello all,
My name is Giovanni, I'm from Italy; I'm a long reader of the forum, and decided to register today because I need your help.
I'm the happy owner of a Sony A6000 machine; I've been bite by the "old manual" glass beast, so now my A6000 rarely sees its kit 18-55 lens, but instead I use it with a growing collection of old manual lens.
I actually own few Vivitar (S1 70-210 V3, 28-210), Pentax A (70-210), Olympus Zuiko (50mm), few russian prime lens (Mir-1B), etc.
I just got a Vivitar S1 28-90, whoch is a great lens, but it has, as usual, the iris blades covered in oil, and almost stuck.
Also the zoom barrel is really hard to move up and down, probably because the lubricant has moved onto the iris blades...
So, my question is: is there anybody that can help me in disassembling the 28-90 lens?
I'm a technician by job (and nature), so I should be able to dismantle and then mount it back again.
i already removed the front and middle lens groups, gaining access to the blades from the front; but this is not enough, because I really need to rempve the iris and clean it better.
I searched and searched, but I didn't found any useful information/manual on how to service the lens; can anybody help me?
A service manual would be very, very appreciated.
Even a step by step procedure would be welcome.
Thank you in advance!
Regards,
Giovanni |