100/2 = 500g
90/2 = 550g
George
ALEXSCIFI@xxxxxxx wrote:
>
> Hi Tim,
>
> I have the 100F2.0 but not the 90F2.0. Your comments suggest the 90
> because the 90 will be much more corrected (sharper) in the close up range
> than the 100F2.0 beyond the 1:5 range of the 100F2.0 (.7 meters) because of
> the floating element correction (used by both). Putting the 100F2.0 on
> extension tubes disables it's ability to correct in that range. If your use
> of real close macro is infrequent, then using a double element close-up lens
> (both Canon and Leica made 55mm versions) is perhaps the better way to go
> with the 100F2.0. Moreover you still have the 50F3.5 to cover the 1:2 through
> 1:5 range(I have the 3.5 also).
>
> However, for traveling with the simplest possible system perhaps the 90
> is the way to go.
>
> By the way, does anyone know the weight difference between the 2?
>
> Alex
>
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