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Difference between Video Lenses and SLR Lenses?
What’s the difference between the quality of video lenses versus still lenses? Broadcast video lenses (and Professionals, to an extent) cost so much more than SLRs, why is that? I understand that video lenses need to operate differently with respect to zoom and focus, as well as use high-quality servo controllers. Is the SLR glass of better quality than Broadcast video lens glass? More elements in video lenses? Coatings? Breathing?
And, a step further, the difference between SLR primes and video/film primes?
This is just my ponder for the week.
tim
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2 Replies
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Interesting ponder. I don’t really have much clue when it comes to SLR lenses, but if I were to take a wild guess, I’d agree that servos and more lens elements is a big part of the equation. For one, video lenses have a set of elements in them to maintain focus while zooming, most have built-in extenders, and my impression is they generally have greater zoom ranges (starting around 15-20x) and smaller f-numbers (larger apertures). And since every moving part needs to be remote-controllable, I’d guess that comes with a price in servos, too.
But again, I’m really just making a qualified guess here, since I don’t know much about the “features” of SLR lenses. Feel free to educate me, though 🙂
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Sorry about that, I forgot to come back and add that I also posted this in the Cinematography forum!
tim
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