The 100mm is best for smaller items like coins, stamps, insects, etc.
The 50mm is best for larger items like whole flowers, groups of flowers,
product photography.
On 2/6/2014 4:17 PM, P.J. Alling wrote:
At any magnification the DOF for either lens will be roughly the same
for a give f stop. I'd go for the 100mm for macro work it will give
you a lot more working room at any given magnification, unless you
expect to be working in cramped quarters then get the 50. As far as
optical qualities, Pentax has never made a bad macro.
On 2/6/2014 2:35 PM, Glen Berry wrote:
Please help me decide on a used Pentax macro lens. I've narrowed it
down to these two used lenses:
50 F2.8 SMC MACRO D FA
100 F2.8 SMC D FA MACRO
What are the pros and cons of the 50mm vs the 100mm?
What applications would the 50mm be best for?
What applications would the 100mm be best for?
Does either of them have a reputation for being noticeably sharper
than the other?
Would the 100mm exacerbate the already shallow depth of field
inherent in macro photography, in other words, would the 50mm have
greater depth of field at 1:1 magnification?
Thanks, for any suggestions!
--
J.C. O'Connell
[email protected]
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