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Cinema requires different lenses. A standard camera lens will not remain in focus while zooming. Cinema lenses have to--imposing restrictions that cause the l
by LorenPechtel 5y ago
Cinema requires different lenses.
A standard camera lens will not remain in focus while zooming. Cinema lenses have to--imposing restrictions that cause the lenses to be a lot more expensive. (A cinema lens works fine for still photography, but why pay the price/weight premium?)
- nullc 5y agoParfocalness can be emulated in firmware (by adjusting the focus as the zoom changes). What you probably should have pointed out is the opposite property: keeping the same focal length while changing the focus distance. This can't be emulated in software because camera lenses don't have a motor on the zoom (plus primes don't have a zoom). Some cine lenses do achieve this by moving a zoom-like group (I think all the ARRI master primes do) and not just by being telecentric on the exit side.