OK - there was a speck in one image but not on the others. Maybe it is a
subject failure?
All the best!
Raimo K
Personal photography homepage at:
http://www.uusikaupunki.fi/~raikorho
----- Original Message -----
From: "Tim Øsleby" <[EMAIL PROTECTED]>
To: <pentax-discuss@pdml.net>
Sent: Saturday, October 29, 2005 1:19 AM
Subject: RE: My new Macro - a lemon.
First test shots. Done in a hurry. Roughly converted
http://www.flickr.com/photos/fototim/sets/1234555/
Tim
Mostly harmless (just plain Norwegian)
Never underestimate the power of stupidity in large crowds
(Very freely after Arthur C. Clarke, or some other clever guy)
-----Original Message-----
From: William Robb [mailto:[EMAIL PROTECTED]
Sent: 28. oktober 2005 23:33
To: pentax-discuss@pdml.net
Subject: Re: My new Macro - a lemon.
----- Original Message -----
From: "Tim Øsleby"
Subject: RE: My new Macro - a lemon.
> As I say in a reply to WB:
> I haven't noticed change of focal length when focusing. It is when
> changing
> aperture. Is that normal too?
>
> My observation on the dust is simply based on what I see in my raw
> converter. I have no idea of the magnification ratio. On screen the
image
> is
> about 8 x 5 inches. The test shot was shot at about 20cm. It is visible
> from
> f5,6, really disturbing from f8, horrifying at f16. I assume that it
fades
> out when opening aperture proves that it isn't sensor dust.
I think you might consider showing us a picture of the glass, and dust
blob
in question.
And perhaps a few web images of how the dust spec is afecting things.
Focal length should not change with aperture.
William Robb
