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	Username   Password FM Forum Rules Canon SLRs, primes, and zooms lenses reviews FM Forums | Canon-mount SLRs | Join Upload & Sell    Search Used end    Archive 2008 · What are the various possible lens problems?

mantat Offline Upload & Sell: On p.1 #1 · What are the various possible lens problems? Hi all, anyone can list me all the various problems someone could have with a lens (any)? So far I have: - not sharp - fungus - front focusing - back focusing - dust magnet - loose focus ring - slow focusing Any other? Thanks Apr 30, 2008 at 10:24 AM

rideexileex Offline Upload & Sell: Off p.1 #2 · What are the various possible lens problems? scratches/dings on barrel scratches/chips on glass elements barrel alignment(for non-internal zooms) contact points not just loose, but uneven tightness on zoom/focus rings filter threads Edited on Apr 30, 2008 at 10:56 AM Apr 30, 2008 at 10:54 AM

mantat Offline Upload & Sell: On p.1 #3 · What are the various possible lens problems? Thanks, but I was thinking about brand new items, not used. Unless some people have seen scratches on new lenses? Apr 30, 2008 at 11:21 AM

trenchmonkey Online Dedicated FM Upload & Sell: On p.1 #4 · What are the various possible lens problems? Reading "my lens is soft" threads & Operator error would be 2 of the top problems not mentioned. Apr 30, 2008 at 11:38 AM

Alan321 Offline Dedicated FM Upload & Sell: On p.1 #5 · What are the various possible lens problems? How about "too many" and "too few" And L fever. Don't forget L fever. Also collimation or lens alignment issues that tilt the plane of focus. IS problems. Switch or button problems. Self-zooming due to poor mechanical gearing for the weight involved. Problems with the electronics (computer, motor, servos, etc.). Internal cables coming adrift (and perhaps being damaged by or blocking moving parts). Dust or other muck floating around inside (usually looks worse than it is). - Alan Apr 30, 2008 at 12:37 PM

claudermilk Offline Dedicated FM Upload & Sell: Off p.1 #6 · What are the various possible lens problems? trenchmonkey wrote: Reading "my lens is soft" threads & Operator error would be 2 of the top problems not mentioned. +1 Apr 30, 2008 at 08:01 PM

Lars Johnsson Online Dedicated FM Upload & Sell: Off p.1 #7 · What are the various possible lens problems? mantat wrote: Thanks, but I was thinking about brand new items, not used. Unless some people have seen scratches on new lenses? If you belive brand new lenses has fungus, then you should expect scratches also Apr 30, 2008 at 08:26 PM

Vivek Offline Upload & Sell: On p.1 #8 · What are the various possible lens problems? Lars Johnsson wrote: mantat wrote: Thanks, but I was thinking about brand new items, not used. Unless some people have seen scratches on new lenses? If you belive brand new lenses has fungus, then you should expect scratches also Apr 30, 2008 at 08:30 PM

Richard Nye Offline Upload & Sell: On p.1 #9 · What are the various possible lens problems? How about CA and bad contrast? Apr 30, 2008 at 08:55 PM

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