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Old Aug 24, 2005, 4:08 PM   #11
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jim gave you excellent advice..

i think you would be quite happy with a rebel xt mated with the 85mm 1.8 or 100 2.0.. both lenses are tack sharp, plenty fast and relatively affordable.. another plus is the USM, or high speed motor, that ensure fast and silent focus.. something some of the other brands do not offer..
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Old Aug 24, 2005, 5:22 PM   #12
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Hards80 wrote:
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i think you would be quite happy with a rebel xt mated with the 85mm 1.8 or 100 2.0.. both lenses are tack sharp, plenty fast and relatively affordable.. another plus is the USM, or high speed motor, that ensure fast and silent focus.. something some of the other brands do not offer..
Most manufacturers havebright primes in one or both of these focal lengths (and usually at more than one aperture that's even brighter in the 85mm).

An 85mm f/1.4 is usually a flagship lens for most manufacturers (or even f/1.2 in the case of the Canon 85mm f/1.2L), due to it's popularity as a portrait lens for 35mm cameras.

But, the f/1.8 andf/2.0 lenses in 85mm and 100mm are usuallyexcellent, too (and much less expensive). ;-)

As for Canon's USM (Ultrasonic Motor), Nikon has AF-S (Silent Wave Motor) lenses and Minolta has a couple of lenses with SSM (Supersonic Motor). Of course, Sigma has lenses iwth HSM (Hypersonic Motor) available in Nikon and Canon Mounts.

If you have to ask what the SSM lenses from Minolta cost, you can't afford them. ;-) Well, perhaps, but they're a bit on the pricey side.

Minolta's SSM technology is only avalable in the Minolta AF 70-200mm f/2.8 APO G (D) SSM and 300mm f/2.8 APO G (D) SSM.

That's not to say that the non SSM lenses are slow, though. You've got a wide variety of focus speeds depending on lens choice, and you've also got speed differences between the AF motors used in different bodies.

Also, none of the AF systems in any of these models is infallible in low light. So, Manual Focus is always an option, too (in which case, viewfinder usability can make a difference, as can lens construction, etc.).

I expect that KM will be introducing a new line of SSM lenses next year with the introduction of the 9D. Given that KM plans on manufacturing 50,000 units/month with the new 5D (not to mention that Sony will be launchinig DSLR models that use Minolta AF mount lenses), I expect that Sigma may decide to add Minolta AF mount to it's lenses offered with HSM, too.


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