What happens when you revers an element in a photo lens?

The Iranian photographer Alireza Rostami also wanted to find an answer to this question, which is why he disassembled an old Zenit Zenitar-M 2S 50mm F/2 and reversed the third element whenn putting it back together. The shortest description for the resulting effect is „soap bubble bokeh“ – a type of bokeh, whose circles look like soap bubbles.

For those of you, who are now confused: this is yet another case of turning a „bug“ into a „feature“. Usually designers are trying to construct a lens in such a way, that it produces round and homogenous bokeh circles. After all, the background should be unobtrusive instead of attracting the viewer’s attention. Bokeh circles with a strong contour or even worse concentric circles (so called onion rings) are considered to be ugly. Some photographers, however, love the effect and are prepared to spend a lot of money on lenses which produce this type of bokeh. Here are a couple of photos which Rostami shot with his modified Zenitar-M.

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This picture was taken by me in 2014 , 2015. This was the first time I made some changes in the optic of the zenit lens. I was searching and studying to make a lens with different bokeh. After some changes in the elements and optic I succeeded in creating these bokeh. I also published the changes I made in my Facebook account. send video to petapixel.com about learn this lens . hope soon can see here . #magic_bokeh #bokeh #petapixel #poto #lens #petapixel #bokeh #zeiss #zenit #zenitar #michaelzhang #michael_zhang #animals_lover #researcher #instagram @instagram #photography #magicbokeh #علیرضارستمی #علیریضارستمی #علیریضا_رستمی #علیرضا_رستمی #alirezarostami #alirizarostami #alireza_rostami

A post shared by Alireza Rostami (@alirizarostami) on

Should you be interested to find out how Rostami modified his lens, you can do so in the following video:

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