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04-28-2012, 05:59 AM   #1
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All-around zoom - Sigma or Pentax?

Hi folks! ヽ(∇`)ノ



I'm considering to get a replace for the old DA18-55 ED AL I ( which had been hit several times and it's focal plane shifted )
All I need is just a decent zoom for rare travel/action occasions $400 is my limit.

Some variants I've found to be acceptable so far:
DA 18-55mm AL WR, Sigma 18-50mm f/2.8-4.5 DC OS HSM.
Sigma might be better but I'm not sure. Maybe some other models around to look at?

04-28-2012, 06:12 AM - 1 Like   #2
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QuoteOriginally posted by Ameiji Quote
I'm considering to get a replace for the old DA18-55 ED AL I ( which had been hit several times and it's focal plane shifted )
All I need is just a decent zoom for rare travel/action occasions $400 is my limit.

Some variants I've found to be acceptable so far:
DA 18-55mm AL WR, Sigma 18-50mm f/2.8-4.5 DC OS HSM.
Sigma might be better but I'm not sure. Maybe some other models around to look at
The Sigma you have listed is an upgrade from the kit, but not a huge upgrade. The Siggy 17-50 is the much much better replacement, that does however put you over your $400 budget. One other lens to check out would be the Tamron 17-50 2.8, you can catch these on sale new sometimes for $398, I think on average they are $450 new - the Tamron is a stellar performer and a favorite with a lot of people in this community.


EDIT: Just looked up the Tamron, Prodigital2000 (fantastic seller) has an incredible deal on it new right now [$379 New], actually this is the best deal I have seen on this lens:

eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices
04-28-2012, 06:28 AM   #3
hcc
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You will find interesting the following in-depth comparison of the Sigma 17-50mm F2.8 vs. Tamron 17-50mm F2.8 vs. Pentax DA* 16-50mm F2.8:
:
DA* 16-50mm vs. Sigma and Tamron 17-50mm F2.8 Comparison - Introduction - PentaxForums.com

Each of these consititutes a major IQ improvement from the kit lens. In terms of price, the Tamron 17-50mm may be the best value for money.

Hope that the info may help.:evil:
04-28-2012, 06:48 AM   #4
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if you can get tarmon 17-50 for 400 new, then get it.
just make sure to do some lens test when you get it. make sure you get a good copy.

or you can go for the superzoom. In my opinion if you are a casual travel photographer, has more zoom reach might be more useful than low light ability.
but superzoom is not cheap. you can get second hand pentax/tarmon 18-250 for about 350-400.
or you can get a sigma 18-125 brand new for 340.
They are both good superzoom by user feedback.


Last edited by liukaitc; 04-28-2012 at 06:55 AM.
04-28-2012, 06:53 AM   #5
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Pentax 17-70 used. Xln't lens.
04-28-2012, 07:00 AM   #6
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if your are interested in the Sigma 18-50mm, 2.8-4,5, about $200 used I assume? maybe you ought to look at the Pentax 16-45mm, f4 constant? no OS or HSM, but the 16mm is cool, nice color and sharpness all range even wide open at f4, you can find them used about $220
04-28-2012, 08:41 AM   #7
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Bonjour

Just my "deux centimes" here ... I'd vote for the Tamron 17-50 f2.8 ... it's a lens that I am seriously considering for the near future.

But if you want a DA 18-55 WR, I've got a double that I do not use and would easily part with ... Yes, yes yes (or rather oui, oui, oui), it's shameless self-promotion, but such is life sometimes, isn't it? PM me if your interested.

Salut et bon courage, John le Frog
04-28-2012, 09:41 AM   #8
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QuoteOriginally posted by liukaitc Quote
if you can get tarmon 17-50 for 400 new, then get it.
just make sure to do some lens test when you get it. make sure you get a good copy.

or you can go for the superzoom. In my opinion if you are a casual travel photographer, has more zoom reach might be more useful than low light ability.
but superzoom is not cheap. you can get second hand pentax/tarmon 18-250 for about 350-400.
or you can get a sigma 18-125 brand new for 340.
They are both good superzoom by user feedback.
I was interested in the tamron 17-50 lens also. What is meant a "good copy"? What should be looked for in the lens if bought?

04-28-2012, 09:58 AM   #9
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+1 for the Tamron

I have a copy that I bought used and I like it. I shoot a lot of lowlight and find it sharp wide open.

My lens has a slight softness to one corner. Since I bought it used I don't have warranty. But it hasn't been bad enough to worry about and you really only see it when pixel peeping. There is another thread here on PF about this lens with some samples.
04-28-2012, 10:49 AM   #10
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The tamron 17-50mm or a used Pentax 18-135mm would be great options IMO.

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04-28-2012, 12:02 PM   #11
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QuoteOriginally posted by jaywes Quote
I was interested in the tamron 17-50 lens also. What is meant a "good copy"? What should be looked for in the lens if bought?
Front focus/back focus.

KEH does have used copies of the Tamron, Sigma (non macro), and Pentax 16-45, all around $300 or so (the Tamron is $364).

Pentax:
Pentax Digital 16-45 F4 SMC DA ED AL (67) WITH HOOD, CAPS, DIGITAL SLR ZOOM SUPER WIDE ANGLE LENS - KEH.com

Sigma:
Pentax Digital 18-50 F2.8 SIGMA EX DC (67) WITH HOOD, CAPS, CASE, DIGITAL SLR ZOOM SUPER WIDE ANGLE LENS - KEH.com

Tamron:
Pentax Digital 17-50 F2.8 TAMRON ASPHERICAL DI II SP INTERNAL FOCUS LD XR (A16) (67)(APS-C) WITH HO DIGITAL SLR ZOOM SUPER WIDE ANGLE LENS - KEH.com

I got a used Tamron from KEH on Monday, and it seems like it focuses fine, but I haven't had the opportunity to really test it out yet. The Tamron seems quite a bit sharper than the kit lens IMO, and I like the bokeh at 2.8 - as a kit lens upgrade, I'll think it will end up being a good performer.
04-28-2012, 12:50 PM   #12
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+ on the Tamron 17-50/2.8, excellent lens. I used it last week here (along with the 77 Ltd) : https://www.pentaxforums.com/forums/post-your-photos/183754-people-sos-band-b...-shanghai.html
04-28-2012, 01:36 PM   #13
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QuoteOriginally posted by guinnessman Quote
Front focus/back focus.

KEH does have used copies of the Tamron, Sigma (non macro), and Pentax 16-45, all around $300 or so (the Tamron is $364).

Pentax:
Pentax Digital 16-45 F4 SMC DA ED AL (67) WITH HOOD, CAPS, DIGITAL SLR ZOOM SUPER WIDE ANGLE LENS - KEH.com

Sigma:
Pentax Digital 18-50 F2.8 SIGMA EX DC (67) WITH HOOD, CAPS, CASE, DIGITAL SLR ZOOM SUPER WIDE ANGLE LENS - KEH.com

Tamron:
Pentax Digital 17-50 F2.8 TAMRON ASPHERICAL DI II SP INTERNAL FOCUS LD XR (A16) (67)(APS-C) WITH HO DIGITAL SLR ZOOM SUPER WIDE ANGLE LENS - KEH.com

I got a used Tamron from KEH on Monday, and it seems like it focuses fine, but I haven't had the opportunity to really test it out yet. The Tamron seems quite a bit sharper than the kit lens IMO, and I like the bokeh at 2.8 - as a kit lens upgrade, I'll think it will end up being a good performer.
Thanks. I will see whats best for me.
04-28-2012, 05:28 PM - 1 Like   #14
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Go for the Pentax 16-45. I have one, great lens.
04-28-2012, 05:42 PM   #15
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My vote is with the Tamron 17-50 unless you need WR
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