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04-29-2011, 09:38 AM   #46
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Ivor, the 100% crop from the Tamron looks great. that is at f/2.8??

04-29-2011, 12:52 PM   #47
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QuoteOriginally posted by cofra Quote
Maybe the Sigma 50-150 should be taken into consideration?

/C
Another vote for this lense .... though not in comparison to the others as I don't have any of them. If you can still find one new (since it's been discontinued pending the arrival of the new, heavier and more expensive OS version) or used. Sigma have a long guarantee so it's not much of a gamble.

Fast & silent HSM and amazingly sharp at all FLs. Much lighter than the 70-200s. See the 100% crop of her eyes below, taken from around 10m away at 150mm @2.8 :-




Last edited by Frogfish; 04-29-2011 at 12:58 PM.
05-01-2011, 04:04 AM   #48
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Re: Sigma 50-150

QuoteOriginally posted by Frogfish Quote
Another vote for this lense.

Fast & silent HSM and amazingly sharp at all FLs. Much lighter than the 70-200s. See the 100% crop of her eyes below, taken from around 10m away at 150mm @2.8 :-
I was almost going to order a Tamron 70-200 from Prodigital - but the Sigma 50-150mm f2.8 II EX DC HSM APO looks like a nice option. I found a retailer with one in stock and they are holding it for me but they want $790 + shipping... Anyhow in addition to the difference in weight, the HSM with quick shift focusing makes the Sigma look like at better option. However I'm curious to know how fast the HSM is.
05-01-2011, 04:45 AM   #49
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QuoteOriginally posted by JHD Quote
However I'm curious to know how fast the HSM is.
It's faster then SDM but I don't know by what numbers. But the main reason not to choose SDM is that HSM is a far better AF-system when it comes to quality of the technology, micro motors vs. ring drive. It's slower and breaks more often. It's kind of their weakest point right now. I like Pentax (that's why I'm here =) but they really need to switch to another focusing system in the future. It's the main reason that almost no one uses Pentax for sports and fast action. The optics, dimensions and WR is good... but it doesn't matter is your goal is to capture things in motion. It's more or less the reason to their position under Nikon and Canon.

It depends on your own usage... what you're shooting and what reach you'd need. Personally I would probably buy the 50-150.. it lack's WR but is a better package and if you'd like the 50-70mm more then 150-200mm range you don't have much options. When it comes to optics it doesn't differ much. But that's just my opinion.

/C

05-01-2011, 05:12 AM   #50
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QuoteOriginally posted by cofra Quote
It's faster then SDM but I don't know by what numbers. But the main reason not to choose SDM is that HSM is a far better AF-system when it comes to quality of the technology, micro motors vs. ring drive. It's slower and breaks more often. It's kind of their weakest point right now. I like Pentax (that's why I'm here =) but they really need to switch to another focusing system in the future. It's the main reason that almost no one uses Pentax for sports and fast action.
There's no need to convince JHD that HSM is better than SDM anymore than you need to convince the Pope to be Catholic

Joking aside, I think what JHD was asking about was how does the HSM speed compare to the screw drive of the Tamron 70-200, not how it compares to the SDM motors in the DA* lenses. I've owned the Tamron 70-200 and I've tried the HSM version of the Sigma 70-200. The HSM is a good bit faster than the Tamron, although I can't really quantify the amount. I did test the Tamron 70-200 against the DA*60-250 and their speeds were about on par. I also compared the Tamron to the DA*50-135, and the Tamron was noticeably quicker than the DA*50-135.

As others have said, and as I'm sure you know, the optics and IQ of the Tamron are outstanding and in that respect you can't go wrong. I've never tried the 50-150 specifically, but it looks like a great options for faster AF and a nice focal length range on a crop-DSLR.

Last edited by dgaies; 05-01-2011 at 05:24 AM.
05-01-2011, 06:02 AM   #51
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Ah... you're probably right, I'm reading to fast :-)

In this case the Tamron is the slowest, as you say. But it's a bit harder to compare screw drive to in lens solutions given the fact that it matters more what camera body is used, and it's internal motor capabilities. It would be interesting with a test between different body's and their AF-speed when using screw drive lenses, both older and newer. I've never seen any, is it available somewhere?

/C
05-01-2011, 06:27 AM   #52
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If you found a Sigma 50-150mm non-OS in stock, then it's probably one of the last ones! I'd jump on it if I were you. Image quality to match any of the lenses mentioned here, most likely the fastest-AF (and silent too!), more reach than the 50-135, and wider than the 70-200, all in a compact package.

I own the 50-150mm and absolutely love it. The price you quoted is about the same as I paid back in November just before they started disappearing from stock.

There's been several threads discussing the Sigma 50-150mm recently, so if you do a search you should be able to find plenty more opinions and sample shots.
05-01-2011, 07:51 AM   #53
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QuoteOriginally posted by dgaies Quote
There's no need to convince JHD that HSM is better than SDM....
Or anyone else for that matter.

It would be nice to have a longer lens that can focus fast so the Sigma looks like the ticket. Also, I just found out the Sigma 50-150 comes with a 10-year warranty here in Canada. IIRC people were snapping these up for $500 when they went clearance. Hoping to get it for around $700, I talked to the dealer about that but they won't budge.

05-01-2011, 08:03 AM   #54
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QuoteOriginally posted by Edgar_in_Indy Quote
If you found a Sigma 50-150mm non-OS in stock, then it's probably one of the last ones! I'd jump on it if I were you. Image quality to match any of the lenses mentioned here, most likely the fastest-AF (and silent too!), more reach than the 50-135, and wider than the 70-200, all in a compact package.

I own the 50-150mm and absolutely love it. The price you quoted is about the same as I paid back in November just before they started disappearing from stock.

There's been several threads discussing the Sigma 50-150mm recently, so if you do a search you should be able to find plenty more opinions and sample shots.
Pretty much what Eddy said.

The HSM AF is faster than the *300 I have which is speedier than the 60-250 which is faster than the 50-135 (pretty much known to be Pentax's slowest focusing SDM lense).

If you want to make the AF even faster then set the AF to the AF button and it's fast. I used it today at the X Games here in Shanghai - no problem whatsoever.
05-01-2011, 08:39 AM   #55
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That's too bad Sigma discontinued such a good lens. It's a bit odd why they would decide to completely replace HSM lenses for ones with OS, because a lot of reason to buy Sigma is for added value. With the prices of their OS and that feature being useless to us in Pentax land... those lenses have little appeal.
05-01-2011, 01:25 PM   #56
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QuoteOriginally posted by dgaies:
There's no need to convince JHD that HSM is better than SDM....
QuoteOriginally posted by JHD Quote
Or anyone else for that matter.
You're correct.

I probably should have said, "There's no need to convince anyone, especially JHD, that HSM is better than SDM
08-10-2011, 08:13 PM   #57
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In case anybody is looking for the now-discontinued Sigma 50-150mm f/2.8, there's one on eBay right now. It's an auction, but has a buy-it-now price of $635. The auction can be found here:

Sigma 50-150 f 2.8 pentax mount barely used w box case - eBay (item 250871906701 end time Aug-16-11 18:02:41 PDT)

I had setup a saved search on eBay for this lens, and they almost never show up for sale. So if you've been wanting one, you might not want to let this one get away.
08-11-2011, 11:23 AM   #58
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here's another Sigma 50-150/2.8 just become available on another forum :

FS: Sigma HSM 50-150mm f2.8 * OR * Pentax DA* 50-135mm f2.8
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