The Biggest Lens Cap I’d Ever Seen Reveals an Exciting Secret

Illustration for article titled The Biggest Lens Cap I’d Ever Seen Reveals an Exciting Secret

Just where did I unearth this mega lens cap? Take your best guess...because the answer reveals a feature package making its way to Gizmodo this week...

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Illustration for article titled The Biggest Lens Cap I’d Ever Seen Reveals an Exciting Secret

Did you guess IMAX technical headquarters in Canada? No? OK, well just so you know, that's where I went. I spent a very long and wonderful day poking at priceless cameras, studying proprietary post processing techniques and, generally, doing my best to kill any and all corporate efficiency.

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Illustration for article titled The Biggest Lens Cap I’d Ever Seen Reveals an Exciting Secret
Illustration for article titled The Biggest Lens Cap I’d Ever Seen Reveals an Exciting Secret

(Note: I understand that my lens distorted the gigantor lens in the least impressive way. Just take another look at that lens cap!)

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DISCUSSION

guillaume-helary-old
Guillaume Helary

The Pentax 6x7 was maybe the biggest SLR ever produced, its design is very similar to 35mm film SLRs with mirror and pentaprism.

It's crop factor is about 2 as compared to 35mm (also known as full frame) while proportion are not exactly the same.

So this lens give a field of view on Pentax 6x7 equivalent to 400 on FF DSLR (Nikon D700 and Canon 5DmkII) and 235 on an APSC DSLR...

There are adapter for Pentax 6x7 lenses to any DSLR mount and even tilt-sift ones but don't expect stellar performance from them, the major design challenge those lenses had where to provide consistent performance accross the film plane (no vigneting, same resolution between borders and center) their peak resolution won't be as high as dedicated APSC of FF lenses. But vigneting will be null even wide opened.

For those curious about those tele-lenses the full list is available at : [www.pentaxforums.com]

Pentax also produced a 1000mm / f8...