Continuation: Sensor Size, Present & Possibilities

Started Apr 10, 2013 | Discussions thread
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In reply to hjulenissen, Apr 11, 2013

You can get a few fast lenses right now. Unfortunately, for whatever reason, they tend to be larger and more expensive than their equivalent FF cousins, which defeats the entire purpose of a small sensor system.

It makes no sense to mate a iphone to a huge lens, or FF to a pinhole sized one. Each sensor has its own optimum lens size that seems to work best.

The ultra fast M43rd lenses I've seen really large.

hjulenissen wrote:

I assume that an ideal APS-C sensor camera could give similar results to an ideal FF sensor camera if "equivalent" lenses were available, at least to the point where total number of photons hitting the surface begins to be a problem.

What is it that limits manufacturers from releasing f/0.7 or larger aperture primes for smaller image circles like APS-C? Is it something fundamental about physics of light (I can't see how that would be), or is it only that it does not make economic sense to manufacture within the tolerances needed for such a lens on a sensor size (APS-C) that in many ways are targeted for those with less cash?*)

One might expect manufacture precision to improve (although slowly) in years to come, although the physical world is unlikely to change in this respect.


*)Inspecting Canons line-up of DSLR cameras and EF/EF-S lenses suggests that crop systems are less expensive than their FF counterparts, and presumably targeted at a slightly different market.

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