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ramcewan


Joined: 02 Mar 2012 Posts: 198 Location: New England, USA
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Posted: Fri Mar 30, 2012 3:35 pm Post subject: oil on aperture is it a huge issue for us micro 4/3 folks? |
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Well this is a hypothetical discussion of course... but I was thinking about the issue of oily aperture blades and understanding that it becomes a big problem when the camera is stopping down the lens on the fly as it slows down those tiny blades, however for people using legacy lenses on manual focus cameras that do not have the ability (such as m4/3) the lens is being stopped down ahead of time and therefore speed is not a concern as long as it moves correctly...
So does this mean that an oily aperture lens might be a good bargain for a m4/3 user?
Obviously the other factors to consider include whether the oil has gotten on the optics and or whether the aperture still functions properly. Assuming that is not the case is it worth the gamble that it won't get worse? _________________ Olympus e-pl2 with VF-2
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Mflenses: Hexanon 50mm f1.8 AR, Hexanon 40mm f1.8 AR, Hoya 80-200mm f4 in AR, Sigma Super-Wide 24mm f2.8 AR, Jupiter-8 50mm f2, Tair 3 300mm f4.5 Brussels Grand Prix
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MFT Digital lenses: Panasonic 45-200mm f4 OIS, Panasonic 14mm f2.5, Olympus 14-42mm II f3.5, Olympus Zuiko 70-300mm f/4.0-5.6 ED (FT with MFT adapter) |
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GrahamNR17


Joined: 17 Jan 2009 Posts: 1972 Location: Norfolk, UK
Expire: 2012-09-06
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Posted: Fri Mar 30, 2012 3:57 pm Post subject: |
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It depends. I have a couple of oily lenses, and the oil prevents it stopping down beyond f5.6 But if your goes all the way down, then no problem  _________________
Cameras:
35mm: ME Super
120: Pentacon Six TL :: Pentacon Six
Digital: Olympus E-PL1 (for sale) :: Kodak DX6490 :: Pentax K10d :: Panasonic DMC-LS5
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Carl Zeiss Jena: MC Biometar 2.8/80mm (P6) :: Flektogon 4/50mm (P6)
Pentax: SMC M 2/50mm
Hoya: HMC 3.8/70-150mm (broken)
Cosina: 3.5-4.5/19-35mm
Industar: N-61 2.8/52mm
Helios: 44-2 2/58mm
Tamron: 02B 2.5/28mm :: 910P 6.3/95-205mm :: 103A 3.8-4/80-210mm
Kodak: Meniscus from 127 Hawkeye (on bellows)
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Laurentiu Cristofor

Joined: 23 Oct 2010 Posts: 437 Location: WA, USA
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Posted: Sat Mar 31, 2012 4:05 am Post subject: |
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It also depends how long it takes to stop down. If it takes half an hour for the blades to creep to the position you selected...  |
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