Looks more like dust internal to the lens to me, especially if you only get
it with moderately stopped down aperature. Is it the same with a different
lens?
Kenneth Waller
http://www.pentaxphotogallery.com/kennethwaller
----- Original Message -----
From: "Charles Robinson" <[email protected]>
Subject: Re: persistant sensor dust
On Apr 21, 2014, at 19:18 , Larry Colen <[email protected]> wrote:
I’ve been having issues on my K-5 II with a bunch of sensor dust that
doesn’t show up on the dust check, but which shows up in the sky whenever
I use a moderately high f/stop.
Unfortunately my $40 lollipop sensor cleaner has disappeared.
Since the dust wasn’t showing up on dust alert, I stopped my 18-250 all of
the way down, aimed it at empty sky then cranked contrast, clarity etc up
in lightroom to show the dust:
https://www.flickr.com/photos/ellarsee/sets/72157644202562425/
Has anyone else run across problems like this on the K-5 II? I bought it
toward the end of the production run last august, so it should be way past
the early K-5 sensor stain issues.
I don’t normally shoot at f/45 but I’ve seen it even at only moderately
high f/stops, like f/16 with my 8mm.
That big blob on the right-hand side is impressively large. That's either
quite far from the sensor, or it's a HUGE something-or-other on the sensor.
It doesn't have the sharp, crisp delineation that you normally get from the
dust that shows up from shooting at a tiny f-stop. Does it show the same
size/location at all zoom ranges? I've never seen dust on a LENS cause
anything like this, but it doesn't look like something that's on the sensor,
either.
Also: I'm noticing that your last 11 photos also have a chunk of black in
the upper-right-hand corner of the image which isn't dust - something is
flat-out BLOCKING light to the sensor up there. What's up with that?
-Charles
--
Charles Robinson - [email protected]
Minneapolis, MN
http://charles.robinsontwins.org
http://www.facebook.com/charles.robinson
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