Larry,
You are probably right about the light coming from the background.
What I am not understanding completely is why all the aperture
images are perfectly aligned along a straight line.
If my assumption is correct that it is a SR that creates
that motion, projecting this aperture images onto different portions of
the sensor, - then why is it in a straight line? I'd assume my shaking
hands to be moving less linearly.
Igor
Larry Colen Fri, 15 Apr 2022 11:25:02 -0700 wrote:
On Fri, 15 Apr 2022, Igor PDML-StR wrote:
I thought some people here might find this curious:
It is interesting to see 5[!] images of the aperture.
Pentax D FA 100 mm F2.8 Macro (not "WR") @ f/5.6
(The lens has 9 elements in 8 groups.)
Some other images from this setting showed only 4.
Never mind the central part of the photo - this is one of the images to be
deleted. I did not crop it out just to show the context of how the image was
taken:
http://42graphy.org/misc/ApertureImages/ApertureImage_IR09244.jpg
I cannot say that I _fully_ understand how all these images are formed, -
especially after looking at this photo:
http://42graphy.org/misc/ApertureImages/ApertureImage_IR09238.jpg
This has up to 8-9 aperture spots, but some of them are motion-blured.
The camera was hand-held, with the motion reduction enabled.
I am guessing that the motion-blur comes from the camera shake, not
compensated by the sensor. But it also makes me wondering if all these
aperture images are effectively just the same single image - due to a
reflection from the sensor that moves as the sensor compensates for the
camera shake.
Any thoughts?
I suspect that if you had stopped the camera down you would see points of light
coming through the foliage in the background.
I think it’s just standard bokeh of point light sources in the background,
especially since I see a bunch of other vaguely MG logos in other portions of
the image.
--
Larry Colen
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