<p>Hello ,</p>
<p>While surfing, I learned IMAX lenses have zero back focal distance<br>
and I want to design a water jet cut from single block glass ,<br>
no mount - mount is the glass block,<br>
two elements ,<br>
flat front and rear ends,<br>
anamorphic lens with <strong>zero back focal distance</strong>.<br>
<strong>I want the film slide on rear flat element.</strong><br>
How can I do it ?<br>
What are the formulas ?</p>
<p>Thank you,<br>
Mustafa Umut Sarac<br>
Istanbul</p>
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