Optically I'd consider them to be nearly equivalent. There is some light falloff in the 28-70 that seems to be worse than in the 28-105, but in terms of sharpness etc I don't see any difference between them -- but, I have never done formal tests.
The advantages of the 28-70 are the light weight and being faster at the long end (f4 vs f5.6). Disadvantages are that 70mm can be pretty short - closer to a long normal lens than a telephoto. I suppose the constant aperture would be useful to those using manual flash.
The advantage of the 28-105 is the extra reach. I don't see much value in the power zoom features, especially since only the earlier Pz models fully support all power zoom modes... (Hey - just now understand what "Pz" stands for!) the disadvantage is the weight and speed (a 105 f5.6 is a very slow lens.)
For me - the 28-70 and 80-320 make a great pair, easy to carry in a small bag. So when I want all contingencies covered, I take those. For holiday type snaps or for a single zoom, I use the 28-105. But in truth I use neither much anymore, because I've come round to seeing a 50mm as the best all purpose lens.
If you need the extra reach of the 105, go for it - but that is probably the only reason to get it over the 28-70.
- MCC
At 09:48 AM 3/9/01 +0200, you wrote:
Hi gang,
There is a powerzoom 28-105 lens around here in a second hand store .
2 months and nobody buyed it !!!!!!!!!! :(((
I'm pleased about my 28-70/4...but... powerzoom(& my Z-1p) and positive comments on
the list about "best consumer grade 28-105"
I need feedback from ppl who used both lenses
I'll do some tests this weekend.
thanks in advance,
adrian sorescu
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Mark Cassino
Kalamazoo, MI
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