I tested another combination aimed at this problem. A 90/2 with the
IS/3 1.7x converter lens on the front. This combo makes appx a 160mm
F/2.5 macro. (My 4T showed the converter lost almost 2/3 stop of light.)
But, 2.5 is still pretty fast, 160 is longer than anything we've got.
And on Gary Reese's test pages, you'll see that this combo far
outperformed the 90/2 + 2x. This one is a B lens all the way, the
other? Fs and Cs mainly.
George
Frank van Lindert wrote:
>
> On Sat, 8 Jan 2000 17:38:25 +0800, Chloe <corella@xxxxxxxxxxxxxxxxx>
> wrote:
>
> >
> >Someone said the Oly macro system lacks a 180 or 200mm macro lens.
> >
> >I recently tried the combination of 180mm f2, 65-116 auto extension tube
> >and 1.4x TC and can now report that this combination works very well. As
> >far as I can tell the corners seem as sharp as the centre. Don't know
> >about distortion though.
> >
> >Giles
>
> A few months back (maybe a year...?) we had a thread on the 90/f2
> macro to be used with the 2xA converter. I do this myself with good
> results. Only modification needed: I had to tear off the small
> protruding lens protector on the rear of the 90mm to avoid damage to
> the 2xA. But the result, a quality 180/f4 macro, is just what I
> needed...
>
> I guess the price of a 135/4.5 + 65-116 + 1.4xA combo is slightly
> higher than that of the 90/2 + 2xA. (rough estimate: $850 vs. $750)
> And the latter, cheaper combination is much faster and also shorter!
> Good, because it lacks a tripod mount ;-)
>
> Frank van Lindert
> Utrecht - Holland
>
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