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01-20-2009, 06:31 AM   #1
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Love affair or marraige-of-convenience?

I'm going to finalize my decision making process re a lense that will live predominantly on my K100dS or K200d (and occasionally on my wife's K-m). There are two alternatives I find not easy to decide:
either

1. Tamron 28-75 1.8 + DA 16-45 or
2. DA 17-70

1.
+ Tamron makes very beautiful pictures as far as I see on samples all over the net
+ fast lense , aperture 2.8
+ wonderful Bokeh
+ my favorite focal length except for tele
+ no primes necessary (28, 35, 50, 70), I have A28/2.8, K55/2, K200/4 alternatively for silky, creamy images.
+ 16-45 could fill the gap at the lower end (I'm not the consummate wide-angle shooter


- two lenses indtead of one (17-70) --> doubble weight
- Tamron AF not as fast and secure
- TAmron Quality control issues
- change or fixing the lense could turn out to much adoo
- 16-45 does not improve in aperture over Kit lense

2.
+ two lenses in one
+ good and soft AF
+ presumably less fuzz fixing the lense when needed
- less aperture in central focal range
- picture quality less beautiful as Tamron

The facts do speek rather in favor of the 17-70, but my impression is that the Tarmron produces the far more beautiful pictures. 17-70 are good too but Tamron seems more to my taste and preferences (softer, lighter, crisper with more differentiation). 28mm seemed to be ok for me so far, but when I revisit my photographs I see more 17-28mm pictures I thought I had, so I'm probably going to miss that range. So the 16-45 just for that? Could go with the Kit, couldn't I?

So currently I'm fallen in love with the Tamron but marriages-of-conveniance are not the worst marriages, are they?

What would you guys think? How'd you characterize the lenses?
Love affair or marriage?

01-20-2009, 07:07 AM   #2
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At this level, all these lenses will produce beautiful pictures, depending on the photographer, the subject and the setting. My M 50 F1.7 + K200D makes bottles and mess on my desk look like art to me (or phart as some have called it on this forum...photographic art).

But back to the subject: SDM makes me not want to use AF with other lenses. I don't own DA 16-45, but according to photozone.de, CA is the dark soul of the DA 16-45, while DA 17-70 is free of that sin.

EDIT: Also, according to photozone.de's tests, DA 17-70 has a bit more resolution at 40mm than DA 16-45 at 45...

Last edited by asdf; 01-20-2009 at 11:05 AM.
01-20-2009, 08:36 AM   #3
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I once owned both the DA 16-45 and the Tamron 28-75 at the same time. I tend to like wide better, so the 16-45 was on the camera almost all of the time, coming off for the 28-75 only when I needed reach. So I sold the 28-75 and got the DA 70 to reduce weight. Sounds like you might prefer the opposite, so what about getting the Tamron for your preferred range and speed, and then the DA 21 or even DA 15 when it comes out for a light, portable complement when you need to go wider? Just a suggestion, good luck!
01-20-2009, 09:16 AM   #4
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QuoteOriginally posted by gnaztee Quote
I once owned both the DA 16-45 and the Tamron 28-75 at the same time. I tend to like wide better, so the 16-45 was on the camera almost all of the time, coming off for the 28-75 only when I needed reach. So I sold the 28-75 and got the DA 70 to reduce weight. Sounds like you might prefer the opposite, so what about getting the Tamron for your preferred range and speed, and then the DA 21 or even DA 15 when it comes out for a light, portable complement when you need to go wider? Just a suggestion, good luck!
Yes, that seem reasonable since I like the longer end better. My photographs on the lower end is mostly people in a group (children), in interaction (discussion) or in a restaurant where I need light (aperture). All my other pictures are landscape and city architecture where I usually end up between 50-80mm and, well of course, tele.

01-20-2009, 10:50 AM   #5
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Here's a recent thread that may be of relevance:

https://www.pentaxforums.com/forums/pentax-dslr-discussion/47396-pretty-pink-green.html
01-20-2009, 10:52 AM   #6
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I have both the Tamron 17-50mm and Tamron 28-75mm. Although I swap out all of my lenses fairly regularly (since I own a few, I like to use them), I really could leave my 28-75 on my camera most of the time and cover most of my shooting. I shoot mostly my family, indoors at home, indoors at birthday parties, outdoors playing around, etc. and this range really covers me well. I needed some sort of wide angle lens after I sold my kit lens, and I got a great deal on the Tamron 17-50. But it spends much less time on my camera than the 28-75. Everyone is different though.
01-20-2009, 11:05 AM   #7
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I like the idea of the Tamron 28-75/2.8 + something wide combination.

Thoughts regarding the something wide:

DA21: very compact, an ideal shoot-from-the-hip lens. Would fill in the wide end of your prime kit too

DA12-24: not cheap and not compact, but performs very well and gets you into ultrawide territory

Kit lens: inexpensive

20-35mm-ish zoom: may outperform the kit lens, usable on film
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