Re: Front Element Condition

On Thu, 27 Nov 2008 19:59:23 -0800, Blinky the Shark <no.spam@xxxxxxxxxxx>
wrote:

Paul Furman wrote:

Blinky the Shark wrote:
I ran across this demonstration (three images) the other day. It's pretty
good. And succinct.

http://www.lensrentals.com/news/2008.10.30/front-element-scratches

Just a tiny bit of damage for that one ;-)

The only time you will obviously notice front scratches and interior
dust is in a situation like this:
http://edgehill.net/Misc/photography/bokeh/6-28-07/pg1pc5
-where different optical principles apply... note the repeating dust
patterns in each circle, slightly offset.

Good example. And in the one with the leaves in the foreground.

Speaking of bokeh, here's the only test for which I've actually assembled
the results:

http://www.pbase.com/blinkytheshark/image/104408541

Why is the supposedly in-focus LED so soft and blurry in all photos?

.

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