Oil on blades – how to fix it without total disassembling

The condition of a lens for reviews and tests can be any, until it doesn’t affect image quality and testing process. ‘Oiled aperture’ is in the list of such typical issues, but visible oil or stacked blades can significantly affect the price, so, it helps to save money of tester. And that’s would be great, if defect can be repaired without big efforts.

Note: demonstrated method isn’t a silver bullet – owner still needs a number of tools, skills and time.

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Lens QA Works – optical design schemes: how-to

Intro

There are a lot of scanned optical design schemes in the network, but lensqaworks.com need to follow Creative Commons Attribution 4.0 International License in as many cases as it possible, that’s why just scanning and publishing of the books isn’t enough. For today the every single optical scheme get a personal approach, with researching over different sources and even consultations with collectors society. I’ve even found an errors on other popular sites.

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LensWars: Chiyoko Super Rokkor 85mm f/2.8 vs. Minolta MD 85mm f/2.0

Comparison of lenses Chiyoko Super Rokkor 8.5cm 1:2.8 LTM (LSM), Minolta MD 85mm 1:2.0

The one of the first versus one of the best. Not a battle actually, better to call it friendly match.

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