Enough abuse can cause misalignment in lenses. I only returned one (a 50mm M mount Summicron) to the manufacturer for repair after the camera was dropped, and retired a 105mm Nikkor that may have become misaligned. The Nikkor had traveled extensively, and vibration isn't good for lenses.
I had a Vivitar Series 1 200/3 repaired because one of the interior groups unscrewed during a 4000km motorcycle tour, but with knocks, barring gross damage, a top-flight lens shouldn't ever present any problems and a cheap one wouldn't be worth repairing. Cheapo 500/8 lenses were notorious for fragility.I hadn't even considered vibrations! I wonder if lenses come out of alignment with age as well?
I had a Vivitar Series 1 200/3 repaired because one of the interior groups unscrewed during a 4000km motorcycle tour, but with knocks, barring gross damage, a top-flight lens shouldn't ever present any problems and a cheap one wouldn't be worth repairing. Cheapo 500/8 lenses were notorious for fragility.
It's quite hard for a lens element to go out of alignment sideways, though, if you think about it. Where is it going to go, if it's in a strong circular cell mount, screwed in? It has to be poorly packed, or in a very thin cell, to go sideways.
On the other hand, lenses can need all kinds of repairs with age. Sooner or later I'll be sending Balham Optical Instruments a 90/2.5 Vivitar Series 1 Macro (sloppy mount), PC-Nikkor 35/2.8 (sloppy mount), Voigtlander 28/1.9 (stiff grease) and Voigtlander 50/2.5 (focusing finger-spur coming loose). I had the last problem once with a 35/1.4 Summilux too.
Cheers,
Roger
It depends on your budget. My impression is that high-end cine lenses are recollimated and even recoated not infrequently. If you've got a $100,000 lens and you're spending millions on production, then these things that are exotic repairs for most still photographers all become trivial expenses.
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2) I place my camera in my vehicle without the camera bag so as to have it handy for a shot, but due to traffic or other obsticals the camera rolls around inside my car from the front seat to the floor, then rolls around again a few times. .....
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Falling from seat to carpeted floor shouldn't affect a top-quality camera or lens, but equally, I wouldn't make a habit of it. Put the neck-strap over the seat back (that's what I do) and the seat makes an excellent vibration damper. I'd not worry too much about vibration, even on the floor: the drop would worry me more. But three or four times I've dropped high-quality manual focus lenses onto stone, from 2 feet or more, and I'm still using all of them. .....
Cheers,
Roger
I wonder why C.Z. did not designed their lenses as they could be dismantled for sevicing without causing a problem for the alignment of the elements, perhaps it is undoable for a decent prize.
Philippe
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