Canon 50mm f1.4 › AF Noise
2 positive · 3 mixed · 5 critical mentions across 10 sources.
Autofocus is provided by a sonic type motor for smooth, quiet focusing, while the outer is a combination of the firm’s Thermally Stable Composite.
This is bad enough during still photography, but it also renders the lens too loud for video work.
as you can hear here full-time manual focusing is not available and the focus ring is very loose and slightly fiddly to use the sigma 1.4 and Canon 1.4 are much better both having ultrasonic autofocus Motors which are faster and very quiet they also have much nicer and smoother Focus Rings which…
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