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05-24-2013, 10:26 AM   #1
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Stains on a used lens i bought

Hi there,

I brought a lens a few days ago while im generally very satisfied with it just minor marks of usage on the outside there is something that bugs me.
Im quite new with the whole camera thing so i never strumbled upon something similar.

A pic helps i guess
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Are these just marks of bad cleaning is the coating mierable or what could it be ?

It can be barely seen normally.
I managed to spot it out quite well on this photo. Normally it can only seen with the right lightning situation.

Thanks for any help in advance.

05-24-2013, 10:37 AM   #2
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Looks like it has some slight haze under the front element. Perhaps some slight trace of dust or leftovers after being disassembled previously and not cleaned properly ? It might be even some sort of condensation perhaps.. I would try to unscrew the front element and clean it carefully - but don't take it as an advice :P
05-24-2013, 11:54 AM   #3
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How old is the lens? Some dust and stains are pretty inescapable in older second hand lenses. If you put on a lens hood, do the stains show up in photos at narrow apertures?
You might try disassembling it yourself. But personally I would rather send it to some repair store.
And yes, haze and condensation might have been the causes. Also, if you leave the lens out in the sun, the UV light can maybe clear up the old glass a little. Works for some lenses, but don't leave it in the sun for days on end, and make sure its not focused so it doesn't start a fire
05-24-2013, 12:02 PM   #4
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Also, if the seller said there were no issues with the lens then you can also try returning for a refund.

05-24-2013, 12:29 PM   #5
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Well the lens is quite old i guess production started 1960.
It dont look like dust or haze at all the lenses seem to be pretty clear actually.
Now watching photo it looks a bit foggy but actually just the "marks stains" whatever on the left upper half are the thing im asking for.
Its an f0.95 lens that i wanted to adapt to a pentax Q in the first place. (and quite cheap on top)
05-24-2013, 03:03 PM   #6
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QuoteOriginally posted by ginjin Quote
Its an f0.95 lens that i wanted to adapt to a pentax Q
Oh...one of those! Let me guess...Canon 50/0.95 in M39 (LTM) in black? The coatings on the Canon LTM rangefinder lenses are notoriously fragile. What you are seeing may be typical for the age and type of lens.


Steve
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