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Modified Zenitar-1S 85mm f/1.4

I was once interested in the following question: how will the aperture with a smooth change in permeability affect the images? I didn't have a filter with a circular gradient. I had to make a hole in a piece of felt and fluff its edges. And it turned out what's in the picture: on the right is the original state, on the left is the modified one.

 

An example of images with this lens with a modified aperture:

www.flickr.com/photos/195993682@N07/54273966579/in/datepo...

 

www.flickr.com/photos/195993682@N07/54266957110/in/datepo...

 

www.flickr.com/photos/195993682@N07/54259407717/in/datepo...

 

As a result of the modification:

1. The sharpness of the lens has increased slightly, as the equivalent aperture has become ~ f/2 (instead of f/1.4).

2. There is a glow of bright areas in the image.

3. The lens pattern has acquired a new character.

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Uploaded on July 27, 2025