I’ve been trying to make sense of these camera rumours and they’re just a mess.
A lens that moves?
The cameras already have moving parts for focus and image stabilisation.
Conceivable moving things not yet present: ND filter, aperture adjustment, zoom, shutter.
A built-in ND filter (like pro video cameras) would be incredibly useful but maybe too hard to explain? On the other hand, Apple or app developers could automate its use and legitimately (for once) boast about cinematic results from a phone. Would be a wild hit with YouTubers.
Aperture adjustment is of limited value with small sensors (stopping down brings only downsides), but the sensors are getting big enough where it would sometimes be useful for depth-of-field control.
Zoom lenses are much bigger and heavier than fixed focal length lenses – worse still if the light path is in a tetraprism – while having higher f-numbers (they allow less light in … than not enough to begin with, remember). Seems crazy to volunteer for those downsides in a phone.
A classical focal plane shutter serves little purpose at 16 Pro readout speeds. The value of that is in the past.
A shutter to stop sunlight destroying the camera might have value. I’ve often wondered how my iPhone doesn’t burn its sensor when facing the sky on a table, say.
But the ND filter is the only one that makes sense to me, and there’s been zero suggestions of that.
Meanwhile, what the tele camera really needs is a lower × rating, like 3.5×, so that the jump from main camera to tele is less jarring, plus a much bigger sensor (and lens) to (a) blur the background, (b) allow cropping to 5× (and higher) with at least as good quality as the 16 Pro.
If any camera needs a zoom it’s the main camera to cover the useful but missing 24–50 mm-e range.