Pana is rumored to plan CFF (compact full frame) for post M43

Started Mar 19, 2013 | Discussions thread
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Re: Why would Full frame Mirrorless affect M4/3?
In reply to forpetessake, Mar 20, 2013

Lenses would still be big right???

Nope, it's a common misconception. Compare, for instance, 35-100/2 on 4/3 and the 70-200/4L IS on 35mm FF. The size of most lenses is determined by the amount of light they need to collect, the same amount light - the same size of the lenses, no matter what the sensor size is:

Except the fact that F4 is slow. The main reason for an F2.8 or faster aperture is to achieve faster shutter speeds. As someone who owns a 70-200/4 and 70-200/2.8 L, I can tell you there is a huge difference in size, and for many things that extra stop of light from the bigger lens is a godsend.

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