What mirrorless lens (video) equates to a camcorder 20X optical zoom?

Started 5 months ago | Discussions thread
sybersitizen Forum Pro • Posts: 21,743
Re: What mirrorless lens (video) equates to a camcorder 20X optical zoom?

Zendit_Outdoors wrote:

What size (focal length) lens would a guy need on a mirrorless camera (say a Sony A7Siii) to be able to 'reach out' and film video at the same distance as a prosumer camcorder boasting a 20X optical zoom?

Say there's a elk standing 250 meters away in a meadow and your buddy has a camcorder with a 20X lens and you want to meet (or, preferably, beat!) the quality of his video, what focal length lens would you need?

What's the maximum focal length of the camcorder lens? What's its aperture at maximum zoom? What's the size of its sensor? What's the sensor resolution? What's the final video resolution?

In other words, you want to elk to take up as much of the screen (assume the same image ratio is being used) as it will in your buddy's camcorder? Even better if you could get a little closer and clearer.

Realize that a 20x zoom is not required for the A7SIII to beat the camcorder in that contest. No zoom of any kind is required - just a lens with a particular focal length. Depending on the answers to those questions (and perhaps some others about lens quality and sensor generation), it might not even be necessary for the elk to 'take up as much of the screen' as it does in the camcorder in order for the A7SIII to 'meet or beat the quality' of the final video output.

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