Skip wrote:
By that logic, then the 2x sensor of the Olympus cameras should produce
lenses that are even smaller, lighter and cheaper, but that doesn't
follow.
Oly 35-100 f2.0(35mm equiv. 70-200 f2.8): 1650g, 96.5mm x 213.5mm, 77mm
filter size and $2199.95
Canon 70-200 f2.8: 1590g, 86.2 x 197mm, 77mm filter and $1699.99.
See, other things enter in to the equation.
Yup, like f2 rather than f2.8. Or to give another example, Olympus
300mm f2.8, 3290g, about 4750 pounds, Canon 600 f4, 5300g about 5800
pounds. Lighter, cheaper and a whole stop brighter. I think I'll rest
my case there.
Peter
You're comparing a 300mm lens to a 600mm lens and coming to the
conclusion that the 300 is smaller and lighter?????
What's wrong with this picture? :-)
A quick look at Canon's offerings shows that their 300/2.8 IS is 2550
gm, so even with stabilization a lot lighter than Olympus' offering.
And it covers the full 24x36 and of course covers the smaller formats
as well. So you have the Canon lens, a truly outstanding optic and
which has IS as well, against Olympus' 300 which is designed to only
cover 12x18 and which weighs a lot more. Seems that Canon has already
optimized the weight.
Also, I'm glad that I don't have to deal with either of those lenses,
'cuz I don't really want to have to haul around eve a 4750 pound
lens. :-)
If you want to compare lenses that give equivalent angles of view;
yes, lenses for smaller sensors can be and are smaller. If you want
to compare focal lengths, the lenses and sizes are equivalent no
matter what format they're designed for.
Remember also, the 35-100 f/2 Olympus lens is just that: a 35-100. It
is not a 70-200. It's hard to compare the Olympus 35-100 to anything
else as other manufacturers don't have 35-100's that are f/2.
--
* Henning J. Wulff
/|\ Wulff Photography & Design
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