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09-26-2011, 07:35 AM   #1
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Tell me about A 100 f/2.8 - not the macro

Lots of discussion about the 100 and 105 macros, but very little about the SMC-A 100 f/2.8 NON-MACRO. Reviews here rate it very high. Setting aside any macro capability, which 100/105 would you rather have for general photography? Right now I use a Sigma 90 f/2.8 Macro in that fl range.

09-26-2011, 09:29 AM   #2
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It's supposed to be the same optical formula as the Pentax-M 100mm f2.8. The A version has the slide-out hood like some of the other M-series telephotos. They aren't as common as the M version. For any non-macro Pentax 100 or Takumar 105, starting price is maybe $75. The A version might be a little expensive because of its compatibiliy and low availability. If you care about size, those lenses are great, maybe half the size, bulk and weight of the macros.

I just sold my S-M-C Takumar 105mm f2.8 which was a beautiful lens that I never used. Even though I do care about size a lot, I was choosing a Tamron 90/2.5 macro for everything. The field of view is like a 135mm on film, it's plenty fast, close focus, excellent IQ, 9 blades - I like it.
09-26-2011, 09:45 AM   #3
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QuoteOriginally posted by jeverettfine Quote
Lots of discussion about the 100 and 105 macros, but very little about the SMC-A 100 f/2.8 NON-MACRO. Reviews here rate it very high. Setting aside any macro capability, which 100/105 would you rather have for general photography? Right now I use a Sigma 90 f/2.8 Macro in that fl range.
It is a very fine lens - very sharp in the centre....beautiful colour reproduction.....one downside is that specular highlights in bokeh show bordering....
can't compare it to the sigma 90, only similar lens i had was K105/2.8.....also a beauty...
09-26-2011, 09:46 AM   #4
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100 2.8

My old Sigma 90 macro works great for general photography, but it is not light weight. I had heard about the quality of the Pentax 100 2.8, very sharp wide open, compact, light weight and thought it would be a good substitute. One comment says it is prone to flare (I use a lens hood on all my lenses). Is that true? Having the A version would be a plus on my DSLR body.

09-27-2011, 12:00 AM   #5
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QuoteOriginally posted by jeverettfine Quote
My old Sigma 90 macro works great for general photography, but it is not light weight. I had heard about the quality of the Pentax 100 2.8, very sharp wide open, compact, light weight and thought it would be a good substitute. One comment says it is prone to flare (I use a lens hood on all my lenses). Is that true? Having the A version would be a plus on my DSLR body.
well it is certainly very small and compact lens.....and 49mm filter is also an advantage
all telephotos are more prone to flare than standards and wide angles.....i didn't notice any flaring beyond normal.....but i always shoot with hood
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