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01-25-2009, 05:02 PM   #1
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Pentax 50-135 vs Sigma 70-200?

I am a week away from purchasing a new lens.

I already have a Sigma 24-70mm F2.8. I do a fair amount of stage/theater shooting as well as wedding work. I rented the Pentax 50-135mm a while ago and was pleased with it. I see good reviews of the Sigma 70-200. I am wondering two basic things. First. Is the Pentax a better piece of glass, and two, how much am I going to miss the range from 135 to 200 if I get the Pentax lens?

If I go with the Pentax 50-135 I could buy a longer lens later this year, but I would rather spend $$ on a second body. I currently shoot a K10d and am very happy with it, but I'm waiting for the K30d (or whatever newer camera) to come out.

Please offer your suggestions. I'm hopping someone has used both lenses.

Tom

01-25-2009, 05:15 PM   #2
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You'll probably get more/better responses in the Lens section. Click on the little flag on the lower left under your name beside your post and ask the moderators to move the thread
01-25-2009, 05:26 PM   #3
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I have both of these lenses, and use them on a k10d. They are both excellent. If I had to choose one, I would go with the Sigma. I have the older non macro sigma. I think the sigma focuses faster. I should also say that I like longer lenses so I may be biased.
01-25-2009, 07:23 PM   #4
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i had both lens for a lil while. I can't really tell the difference between them IQ wise, I like the extra range more than weathersealing and 50-70mm so I sold the Pentax 50-135mm. Since you have the 24-70mm might make more sense if you would go with 70-200mm but only you would know what kinda condition you'll be shooting. If you thinking of 50-135 and 200mm prime i would rather have the 70-200 + a 300mm prime (or save the money to get a new camera). Although you can get the 50-135 + 300mm the gap there is huge, unless you have another (slower) telezoom to use in case you need those lengths. Either way, its alot of money to be spending so only you can decide. Good luck!!! Hope you make the right decision and no regret.

01-25-2009, 08:22 PM   #5
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If you want a lens that is unobtrusive for concert and wedding pics, go with the 50-135. I have the Tamron 70-200mm and with hood attached it is anything BUT stealthy, and the Sigma 70-200mm is an equivalent size. Considering weather sealing and IQ of the 50-135, I'd choose that over the Sigma 50-150 also.
01-26-2009, 03:43 AM   #6
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Heh, I've been pondering on the exact same question. Yesterday my target(s) got scared and ran away when DA50-200mm started the usual AF concert which just nailed the coffin for it. I was approaching a group of four bisons, who were lying in the snow staring at me intensively, from a moderate distance and got into position to shoot. It was dead silent and a bit dark as well so the animals were keeping their guard. As the lens started buzzing with the screw drive the bisons took a hike damn it The place was not in the open so I couldn't take the shot that far away.

Sigma 70-200:
-HEAVY
-no weathersealing
+silent HSM for Pentax which apparently is pretty fast according to reviews
+100 euros cheaper than 50-135 SDM
+more range
+F2.8 all the way to 200mm
+suitable for my lens kit (10-20mm, 35mm, 50mm, 70mm and 50-200 which is to be replaced)
+DG lens, not limited to APS-C cameras

50-135SDM:
-short in length
-overlapping in terms of focal length with my current lens collection
-loss of F2.8 with a TC
+portable thing
+++weathersealing
+high praise for the IQ
+SDM for silent focusing

Hard decision, very so. Is the Sigma really rational approach for shooting without a tripod? I don't mind carrying the extra weight but long shooting sessions it might be limiting factor. Sigma would require carrying a large bag. So 50-135SDM would win when agility is considered.

EDIT: OH CRAP! Is K200D only limited to KAF2? This Sigma 70-200 requires KAF3

Last edited by Maffer; 01-26-2009 at 06:11 AM.
01-26-2009, 03:05 PM   #7
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about me Pentax 50-135 and Sigma 70-200 are 2 different lenses.

Pentax 50-135 is lovable.
01-27-2009, 02:17 AM   #8
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I have the k10d, so it'll work for me. I'm leaning toward the Sigma because of reach.

01-27-2009, 05:45 PM   #9
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QuoteOriginally posted by Maffer Quote
Yesterday my target(s) got scared and ran away when DA50-200mm started the usual AF concert which just nailed the coffin for it.
FWIW, you *could* have focused manually...

QuoteQuote:
EDIT: OH CRAP! Is K200D only limited to KAF2? This Sigma 70-200 requires KAF3
"KAF3" is a term used to describe a lens that can *only* focus via SDM, and if the Sigma is in that category, it won't work with older pentax cameras like the K100D (non-super) or *ist series. But the K200D, like all recent Pentax cameras, can focus via SDM *or* via screwdrive, so you're safe.
01-28-2009, 12:38 AM   #10
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Ookay thanks. And yes, I should have focused manually that's true, they were still in the first place.
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