The D means it's "optimized" for digital.
1. It has special coatings and a revised /special/ optical design to
minimize the faults that digital is err to. (I think this is mostly
marketing hype, a good lens is a good lens and makes good photos, a bad
lens can still be fun).
2. It used to mean that it had a mechanical aperture ring, and the
necessary couplings, but alas no more.
That's about it.
On 9/8/2010 3:34 PM, Christine Nielsen wrote:
Greetings, all---
Today, I enabled myself with the Pentax smc FA 100mm 2.8 macro lens.
Funny thing is, it happened kind of by accident... I thought I was
purchasing the DFA 100mm 2.8 macro (the non-WR version), but it turns
out I overlooked the missing "D" when I placed my order. Whoops.
Anyway, I picked it up to use for some jewelry shots I'm doing for a
client. When I saw that it wasn't what I had in mind, I wasn't sure...
it has a kind of funky look to it, with a deeply recessed lens. But
-- I'm really liking it so far. The images are sharp, and the AF is
fast. I think this could be the start of a very nice relationship...
What I wonder is this: what am I missing out on because of my
shopping cart mix-up? (Besides the price difference...) I'm not sure
I understand the difference between the DFA& FA designations... Are
there other features of either lens that I should consider before I
declare this one a keeper?
Thanks,
-c
--
"His lack of education is more than compensated for by his keenly developed moral
bankruptcy."
-Woody Allen
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