Hi,

I like circular images.
Some of my microscope cameras are made for roundish images only.
Like the 1930s Zeiss Miflex, a 6.5/9cm plate camera used here:

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Or using a 1980s camera with optics selected for circular images. An undocumented feature of the Zeiss MC63 camera. ;-)

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More images and info here, if you like:
https://www.flickr.com/photos/136145...57686135321996

Best
Jens