Is sensor size an industry wide sham?

Started Jun 2, 2012 | Discussions thread
Louis_Dobson
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Re: Is sensor size an industry wide sham?
In reply to GodSpeaks, Jun 3, 2012

You've missed the point. An f5.6 FF lens gathers as much light as an MFT f2.8 lens. So no, they would not be too slow to use - on an FF camera you just crank the ISO.

The disadvantage is that the camera itself is large. The advantage is, in low light conditions, you can take the f5.6 lens off and put an f2.8 lens on .

GodSpeaks wrote:

To get an idea of what is possible, take a look at zoom lenses like the Tamron 28-200 f3.5-5.6 or 28-300 f3.5-6.3.

For full frame coverage, these lenses are pretty small and light - compare them to something like Nikon/Canon/Sony/Tamron 70-200 f2.8.

Making the lenses slower would make them a bit smaller, but probably not a lot, as they are already pretty slow. But one major problem would be that they are slow, possibly too slow for anything but use in good daylight.

So what do you do in less than stellar light? Use high ISO, a tripod, or change lenses (to something much faster)?

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