F stop technical limits?

Started 2 months ago | Discussions thread
BJL Veteran Member • Posts: 9,339
F stop technical limits? there are 30x constant f/1.7 zooms, at a price

There are commercial video "box lenses" from Canona and Panasonic that offer constant f/1.7 over a zoom range of about 30x (and then a bit more zoom at the long end with f-stop increasing rapidly); some reach 350mm (true focal length) at f/1.7. The latest are for the new 1.25" format 8K video cameras (about 2 micron pixel pitch) so resolution must be fairly good.

They weigh about 50Kg and cost about $200,000.

So the limits are mostly cost and weight.

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Smaller lenses, better in low light, more telephoto reach:
you can have any _two_ at one time.

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