A few scratches, even if deep and/or long, don't affect optical performance
much. Just fill the scratch with india ink or flat black paint (Krylon 1602)
applied with a toothpick and wiped off with a clean cotton rag. If an element
is scuffed all over, as from bad cleaning or being allowed to float around
unprotected in a camera bag, the lens will have lots of haze, but would still
be usable for portraits and the like, where lower contrast may be an advantage.
Joe Gwinn
At 4:06 AM +0000 10/8/02, olympus-digest wrote:
>Date: Tue, 08 Oct 2002 10:46:19 +0800
>From: "C.H.Ling" <chling@xxxxxxxxxxxxx>
>Subject: Re: [OM] 50/1.4 MC serial#'s
>
>I think it all depends on the scratch size compared to the element
>size, a 2-3mm long scratch will be be acceptable for a 18/3.5 or
>16/3.5. BTW, open sky will not seen flare, you will only see flare
>under server backlight. e.g. sun set behind a man and you open up try
>to see his face, not stop down to exposure for the sun.
>
>C.H.Ling
>
>
>dreammoose wrote:
> >
> > I have a >1,100,000 50/1.4 with a modest scratch in the coatings of the
> > rear element about 2-3 mm long, closer to the center than the edge. I
> > got it cheap with the intention of waiting for one with a damaged front
> > element for a swap of elements. I took a couple of test pictures, one of
> > a tree against open sky to check for flare, and I don't see any effects
> > from the scratch. I think rear element flaws are generally much more
> > likely to be a problem than those on the front, but not necessarily "death".
> >
> > Moose
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|