Forgotten in its old age

by Aditya

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I've heard several times that one of the reasons videographers are so interested in DSLR video is access to the wide range and low cost of dslr lenses.

It would seem to me that they would be very similar, other than some specialized features such as gearing for focus pulling on video or image stabilization on still photography, so what make the two lenses different? Why would professional video lenses cost more than professional photo lenses?

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2 Answers 2

up vote 9 down vote accepted

This is a good question and one I've recently wondered about, I found this article to be very informative once you ignore his complaints about 'cheap plastic photography lenses with no focus rings and variable apertures'. Lets assume we're talking about professional lenses here (L lenses etc), his points were

  • Cine lenses have more of a 'oiled' or damped focus/zoom feel which aids in not jarring the viewer with the fact that focus/zoom is changing. I agree, all my (many) L lenses are very snappy on focus and zoom which is helpful when quickly changing focus & zoom before shooting a photo but could be jarring if not compensated for when shooting video.

  • Cine lenses have more variable aperture adjustment ON the lens which he points out that even if your camera can adjust aperture while recording it can only do it in 1/2 to 1/3 steps which can be jarring for the viewer.

  • Cine lenses have gearing built in for follow focus (but you can add this w/varing degrees of succes with aftermarket modifications to photo lenses).

It looks like it comes down to photo lenses are optimized to help you quickly change settings before/between shots and cine lenses are optimized to prevent viewers from noticing changes you're making while recording.

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HDTV studio box lenses are optimised for performance across the whole image compared to ENG lenses which are optimised for centre performance and weight.

See: Difference between studio box lenses and portable lenses - Ask Larry!

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