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06-07-2007, 09:33 AM   #1
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Which pentax 28-105?

I'm looking for a Pentax F/FA 28-105 as a travel lens but found 3 different versions listed. Which one is the best one?

06-07-2007, 01:03 PM   #2
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The 3 FA versions are as follows:

-SMC-Pentax FA 28-105mm F4-5.6
-SMC Pentax-FA 28-105mm F3.2-4.5 AL [IF]
-SMC Pentax-FA 28-105mm F4-5.6 [IF]

I can recommend either of the first two, but the last is made by Tamron and therefore completelly different in structure from the other Pentax lenses.

The F4-5.6 version has a very solid build and features power zoom, which can only be taken advantage of my the K10D. If you don't have a K10D, the faster, lighter, let more flimsy F3.2-4.5 version may be better for you.

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06-07-2007, 01:08 PM   #3
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Thanks Mo, great info as always..
and the hunt is on..
06-07-2007, 02:40 PM   #4
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QuoteOriginally posted by Mo Quote
The 3 FA versions are as follows:

-SMC-Pentax FA 28-105mm F4-5.6
-SMC Pentax-FA 28-105mm F3.2-4.5 AL [IF]
-SMC Pentax-FA 28-105mm F4-5.6 [IF]

I can recommend either of the first two, but the last is made by Tamron and therefore completelly different in structure from the other Pentax lenses.

The F4-5.6 version has a very solid build and features power zoom, which can only be taken advantage of my the K10D. If you don't have a K10D, the faster, lighter, let more flimsy F3.2-4.5 version may be better for you.
I prefer the newest F3.2-4.5 version.

In terms of quality of image, it is generally regarded as a bit better or the same as the powerzoom version. But it is also harder to find on eBay. I find it a very nice lens because it's small, light & compact; is faster than the powerzoom version; yet is a good quality lens. One really big advantage of this lens over the PZ version is that it is internal focussing, so you can mount polarizers and grad filters without the front element rotating.

Because it is so compact, it fits well in my camera bag so I end up using it the most of all my zoom lenses.

06-07-2007, 02:56 PM   #5
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I have the PZ version. It's a pretty good lens, and the range is great to have, especially as a walkaround lens, but it's pretty big and heavy compared to my other Pentax AF lenses.
06-07-2007, 05:37 PM   #6
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I had both the 3.2 version and the PZ version..

The PZ was slightly better on the wide end. The 3.2 is better on the long end (by a larger margin).. Apart from that the PZ was more solid but much heavier.. And of course the 3.2 is faster..

On the k10d/k100d the 3.2 did fail to lock focus at 100-105mm from time to time. This seemed to be a generic problem with this lens on the k10d/k100d, I had sold my PZ model by that point though so I don;t know if that was the same?

I would still recommend the 3.2 model over the PZ..
06-07-2007, 07:51 PM   #7
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Thanks all, I'm still undecided. I like the PZ and the fact that the lens is black, but it's twice the weight of the 3.2. It becomes a factor when carrying a camera (K10D with grip) and possibly 3 lenses for up to 12 hours at a time. I guess availability will be the deciding factor.
06-07-2007, 09:19 PM   #8
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QuoteOriginally posted by detlef Quote
Thanks all, I'm still undecided. I like the PZ and the fact that the lens is black, but it's twice the weight of the 3.2. It becomes a factor when carrying a camera (K10D with grip) and possibly 3 lenses for up to 12 hours at a time. I guess availability will be the deciding factor.
Hint...

I normally wouldn't post flea-bay, I mean eBay, auctions but Henry's currently has several brand new of the f3.2-4.5 lenses for sale with an incredibly cheap BIN price. They are a very reliable seller. Lots of people on the different camera fora, including myself, have bought from them.

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