How big would a 100-200 f2.8 m43 OIS be?

Started Nov 12, 2012 | Discussions thread
rkeller Senior Member • Posts: 1,066
Re: How big would a 100-200 f2.8 m43 OIS be?

micksh6 wrote:

Micro 4/3 version of 70-300mm is 1/2 stop slower, not 1/3 stop slower, and that's why it's lighter.

Between 1/3 and 1/2 stop. That's why I put the "~" in there.

Also micro starts from 75mm, not from 70.

Good catch: I noticed my typo long after the editing window had closed.

There won't be any significant weight reduction for m4/3 50-200mm lens if it retains maximum aperture at the long end.
It's physics. They can only make the same lens lighter by compromising optical and build quality.

There's more to it than that from a design perspective. For another comparison:

Specs for the 4/3 Zuiko 14-42mm f/3.5-5.6:

  • 10 elements in 8 groups, including 1 ED and 2 aspherical elements
  • Filter size: 58mm
  • 61mm x 65.5mm / 2.4 in. x 2.6 in.
  • 190g / 6.7 oz

Specs for the m4/3 M.Zuiko 14-42mm f/3.5-f/5.6II

  • 8 elements in 7 groups, including 3 aspherical elements
  • Filter size: 37mm
  • 50mm x 56.5 mm / 1.96 in. x 2.22 in. (min.)
  • 112g / 3.95 oz

This time at 41% weight savings going from 4/3 to m4/3. One could argue the build quality is different, but the m4/3 version has, if anything, a higher optical quality.

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