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Optical diffusion/diffraction - removing front element of lens?

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Hi all,

I'm trying to find a way to optically diffuse/diffract light so that the image is blurred towards its outer edges. Similar to what they did in Post Tenebras Lux, where I have read somewhere that they removed front elements of the lens. Would love to hear how you'd go about this. 

thanks, Alex



Post Tenebras Lux - main image.jpg

Edited by Alexander Boyd
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Reversing the front element will give you a center spot that is in focus, and blurred edges. It's a lot like a Lensbaby effect, but not as controllable.

The effect in your pictures looks different, as if they are shooting through a piece of glass with a hole cut in the center of it.

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Thanks for pointing this out, Stuart. You're right, the edges are not just blurred as in a lensbaby effect, but the light is kind of "broken up" and refracted. I'll do some tests with additional glass in front of the lens.

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