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dsglass

dsglass club

Posted: 27 May 2015

Taken: 24 May 2015

0 favorites     3 comments    285 visits

1/30 • f/4.0 • 85.0 mm • ISO 320 •

NIKON CORPORATION NIKON Df

0.0 mm f/0.0

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this photo by dsglass

First experiments with the petzval's experimental apertures: starry night: standing at the Washington Square arch, looking up fifth avenue
Comments
 Valfal
Valfal
I never heard of this technique before. Very interesting results!
9 years ago.
dsglass club has replied to Valfal
Thanks! :) More of a lens design feature than a technique, really... :) The lens is a copy of an 1840s lens design; you change the aperture by dropping one of these little plates in a slot on the top of the lens:



The ones on the right are some of the normal apertures (those are f16, f5.6, and f2.2); the ones on the left are from the experimental aperture kit I got the other day (there's also a blank one for cutting your own shapes). As you can see in these test shots, it changes the shape of bright out-of-focus spots; with a regular round aperture, all those stars would just be circles. :)
9 years ago. Edited 9 years ago.
 dsglass
dsglass club
Here's the lens in action:



You can see the aperture plate sticking up (think that was either the 2.2 or the 2.8?); if you click through and check out the test shots in the comments, you can see the normal "swirly bokeh" effects of the lens. :)
9 years ago.

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