subject induced refraction?

This shot was taken with the sun just off the tip of the crane:
http://www.aliasimages.com/images/Ju...0Crane0011.jpg

ghosting and flare about what one would expect...

The next was with the sun right on the tip of the crane:
http://www.aliasimages.com/images/Ju...0Crane0010.jpg

In this version there are many more ghost images. I suspect that
the complex junction at the tip of the crane made multiple images
of the sun which in turn made all the extra ghosts in the upper
left...

Comments?

(Maxxum 20mm f/2.8 at f/11; E100S. UV filter in place as the
area was somewhat dusty)

Cheers,
Alan

--
--e-meil: there's no such thing as a FreeLunch.--

Alan Browne wrote in
:


This shot was taken with the sun just off the tip of the crane:
http://www.aliasimages.com/images/Ju...0Crane0011.jpg

ghosting and flare about what one would expect...

The next was with the sun right on the tip of the crane:
http://www.aliasimages.com/images/Ju...0Crane0010.jpg

In this version there are many more ghost images. I suspect that
the complex junction at the tip of the crane made multiple images
of the sun which in turn made all the extra ghosts in the upper
left...

Comments?

(Maxxum 20mm f/2.8 at f/11; E100S. UV filter in place as the
area was somewhat dusty)

I'm more inclined to say that filter in the dust is the cause, since
there's no uniformity to it and it's not following the lens axis. Small
potential that exactly the right angle bounced some reflections off of the
lens surfaces onto the back of the UV, too.

I think it's possible to have subject-induced refractions, but only
in the cases where the subject can act like a lens or pinhole, and I doubt
you would see it through a lens itself, but only when the sunlight was
projected onto a surface for "focus'. What comes to mind is the effect
where spots of sunlight coming through trees and screens can produce
multiple images of a partial eclipse onto surfaces (when a partial eclipse
is in effect, of course).

I could be wrong, this is only speculationm and I;'ll disavow all
knowledge of this conversation if questioned.


- Al.

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To reply, insert dash in address to match domain below
Online photo gallery at www.wading-in.net

i just wanted to say that the title of the thread "subject induced refraction"
sounds like a medical condition of some sort

Al Denelsbeck wrote:
Alan Browne wrote in
:


This shot was taken with the sun just off the tip of the crane:
http://www.aliasimages.com/images/Ju...0Crane0011.jpg

ghosting and flare about what one would expect...

The next was with the sun right on the tip of the crane:
http://www.aliasimages.com/images/Ju...0Crane0010.jpg

In this version there are many more ghost images. I suspect that
the complex junction at the tip of the crane made multiple images
of the sun which in turn made all the extra ghosts in the upper
left...

Comments?

(Maxxum 20mm f/2.8 at f/11; E100S. UV filter in place as the
area was somewhat dusty)

....oops... was E100G.



I'm more inclined to say that filter in the dust is the cause, since
there's no uniformity to it and it's not following the lens axis. Small
potential that exactly the right angle bounced some reflections off of the
lens surfaces onto the back of the UV, too.

I think it's possible to have subject-induced refractions, but only
in the cases where the subject can act like a lens or pinhole, and I doubt
you would see it through a lens itself, but only when the sunlight was
projected onto a surface for "focus'. What comes to mind is the effect
where spots of sunlight coming through trees and screens can produce
multiple images of a partial eclipse onto surfaces (when a partial eclipse
is in effect, of course).


What led me to the idea that it is subject created difraction (as
opposed to dust on/near the lens is that he two shots were taken
about 10 seconds (less?) apart. After the 'off' point hot I
repositioned such that the shaddow of the camera fell onto the
shaddow of the top of the crane...

Cheers,
Alan


--
--e-meil: there's no such thing as a FreeLunch.--