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View Poll Results: Which would you choose?
Sigma 50-150mm f/2.8 ($750) 1422.58%
Sigma 70-200mm f/2.8 ($800) 4470.97%
Both! 46.45%
Voters: 62. You may not vote on this poll

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05-22-2008, 04:04 AM   #1
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Sigma 50-150mm vs 70-200mm

Adorama is taking pre-orders on the new Sigma HSM f/2.8 zoom lenses:

691109 Sigma 50-150mm f/2.8 EX DG HSM II Normal-to-Telephoto Zoom Lens for Pentax Digital SLR Cameras

579109 Sigma 70-200mm f/2.8 DG Macro HSM II Auto Focus Telephoto Zoom Lens for Pentax AF

Which lens would you get and why? The 70-200mm seems the better deal, but it is also nearly double the weight of the 50-150mm. Other than that difference, the two lenses seem very similar overall.

05-22-2008, 04:44 AM   #2
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I hope the 70-200 will be good. I would choose that. If you also want something smaller and lighter, i would go for the 70-200 and DA* 50-135 also. I think the DA* is better than the 50-150.
05-22-2008, 05:42 AM   #3
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What about the TCs

It doesn't seem clear if the tele-converters mentioned in the ad support the HSM. Possibly we will have to wait for Pentax's new TC?

At least the prices don't look too scary.
05-22-2008, 06:34 AM   #4
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The bigger the better in my case
One day to have a 600mm F/2 mmmmm (wake up Jeff)wishful thinking

cheers

05-22-2008, 06:39 AM   #5
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Hell, both!
05-22-2008, 06:45 AM   #6
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I don't mean to be negative, but I think I'd rather have the Pentax 50-135mm (compared to the sigma 50-150mm), for the ultimate compatibility with the body despite a slight cost saving. I've seen the said lens for less than $800 on ebay.

Performance comparisons will be interesting.

The Sigma 70-210 though faster, will have to compete with the larger focal length of the Pentax 60-250mm (F4), when it comes out also.

It's still nice to see these Sigma lenses though, especially as they might be the first Sigma's with HSM for Pentax.
Sigma lens availability and Photoshop Express Updates: Digital Photography Review

Let the Sigma HSM for Pentax begin!
05-22-2008, 08:51 AM   #7
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If I had to buy one of them, that would be the 70-200 because I've already tried the 50-150 and beyond about 130mm is realy mediocre imagewise. For the 70-200 there is still hope
05-22-2008, 09:43 AM   #8
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QuoteOriginally posted by gkopeliadis Quote
...I've already tried the 50-150 and beyond about 130mm is realy mediocre imagewise. For the 70-200 there is still hope
You tried this for the Pentax mount? I thought it wasn't out? Are you making an assessment of the lens based on your experience with a single copy?

I need a 70-200 f/2.8 but am tempted by the size and weight of the 50-150, but I DO need good IQ at 150mm.

05-22-2008, 10:51 AM   #9
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You missed out an option - Neither!

Would only buy a Sigma lens if I was desperate and there was absolutely nothing else available.

Having (quality*) Pentax glass is one of the main reasons for having a Pentax body IMO.

* I agree that they can make duds as well!
05-22-2008, 04:02 PM   #10
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For alot of the indoor sports and events I'm shooting I need a long fast lens. I was going to go for the 50-135 until looking at most of my shots and found I needed to go out to at least 170 so when the Sigma was announced I called my dealer and found it would not be out until about now I asked about options and found out Tamron was coming out with a 70-200 2.8 NON-HSM about $130.00 cheaper. I said order it he called me back said it won't be out until about the same time as the Sigma, Ok put in a standing order for the Tamron anyway. Now I just wait, if you check the specs. between the Sigma and Tamron are close though. I would have ordered a Pentax lens for my K10 if what I needed was available from them.
05-22-2008, 05:35 PM   #11
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on dpr: "The 70-200mm f/2.8 APO EX DG MACRO HSM II and 50-150mm f/2.8 APO EX DC HSM II lenses, should be available at the beginning of August, we are told"

AAAUUUUUGGGHHHH!
05-22-2008, 08:04 PM   #12
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Da*60-250?
05-23-2008, 06:14 AM   #13
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QuoteOriginally posted by superfuzzy Quote
You tried this for the Pentax mount? I thought it wasn't out? Are you making an assessment of the lens based on your experience with a single copy?

I need a 70-200 f/2.8 but am tempted by the size and weight of the 50-150, but I DO need good IQ at 150mm.
On a Nikon D300, a SIGMA APO 50-150mm F2.8 II EX DC HSM. Single Copy. No comparative photography.
So my assessment isn't a "scientific" one :ugh:
In my experience there wouldn't be much diference on Pentax mount. The drop in IQ was gradual, symetrical and big as the focal length grew beyond 130mm (lower resolution and higher CA to the point that the resolution drop may be acounted to the CA)
In your shoes I would wait to see the 70-200. It seems to be another kind of animal. Or at least I wouldn't buy it until I had a hand on experience (Photographs and all...)
05-23-2008, 07:21 AM   #14
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i vote neither, because of lack of SDM on my part. i'll wait for the Tamron 70-200
05-23-2008, 09:38 AM   #15
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QuoteOriginally posted by gkopeliadis Quote
On a Nikon D300, a SIGMA APO 50-150mm F2.8 II EX DC HSM. Single Copy. No comparative photography.
So my assessment isn't a "scientific" one :ugh:
In my experience there wouldn't be much diference on Pentax mount. The drop in IQ was gradual, symetrical and big as the focal length grew beyond 130mm (lower resolution and higher CA to the point that the resolution drop may be acounted to the CA)
In your shoes I would wait to see the 70-200. It seems to be another kind of animal. Or at least I wouldn't buy it until I had a hand on experience (Photographs and all...)
I think you are giving sage advice to wait for the 70-200. I'm a stringer for a few newspapers and occasionally need up to 200mm. With the k20 + battery grip + 70-200 the thing will be a beast to carry
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