A Hypothetical "Larger than full-frame": Lens Question

Started Jul 7, 2013 | Discussions thread
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Re: A Hypothetical "Larger than full-frame": Lens Question
In reply to Muresan Bogdan, Jul 8, 2013

Muresan Bogdan wrote:

It also depends on the distance from the lens to the sensor. The image is projected on the sensor so as you get further the image gets bigger, just like your office projector. So in theory you could use the lens. You would lose infinit focus and probably some IQ also.

I don't think the image circle of a lens increases with the image at closer distances. The image increases in size, but does not keep the same quality at the edges. The projector lens in your example is reversed. It is a known technique to reverse the direction of a lens for extreme macro work. The same technique could be used to increase the image circle at close distances. To summarize, in your example, in addition to a closer distance, you would also need to flip the lens back forward to use it with a larger format.

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