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04-03-2012, 03:08 AM   #1
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which of these zooms have best IQ and AF speed

well im now try to decide on my zoom perches. which would be the best lens out of the following interms of AF speed,sharpness and bokeh

1 tamron 70-200
2 sigma 50-150
3 da* 50-135

thanks

04-03-2012, 03:10 AM   #2
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Far better to check yourself !
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04-03-2012, 03:58 AM   #3
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yup but you do not have the tamron or the sigma there
04-03-2012, 04:02 AM   #4
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QuoteOriginally posted by nirVaan Quote
yup but you do not have the tamron or the sigma there
Just go to Nikon DX, same lenses .

04-03-2012, 04:11 AM   #5
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seems sigma 50-150 is the perfect lens for me but dam its out of production
04-03-2012, 04:41 AM   #6
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My personal choice would be the tamron 70-200. Its IQ is excellent etc, and its just
superb value for money. I like the idea of the 50-135 or 150 myself but I wont buy one.
The SDM is prone to failure on the pentax and its an expensive fix. I think pentax should fix them for free but sadly its not the case. Tokina made the same variant but not in pentax it seems which I also think is bad. You are then forced to buy the far more expensive Pentax. There still maybe a few 50-150 sigmas knocking around on the shelves. Worth a try !
04-03-2012, 04:56 AM   #7
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i would have gone with the tamron as well if not for the size and slow AF.
04-03-2012, 07:27 AM   #8
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QuoteOriginally posted by nirVaan Quote
i would have gone with the tamron as well if not for the size and slow AF.
The Tamron is not particularly slow to AF. It would be faster than the Pentax 50-135. With the price increase on the 50-135, you could buy two of the Tamrons.

04-03-2012, 07:35 AM   #9
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yea i really like the tamron but its big.i want one that i can carry always and over here in japan Tamron is 64000yen and DA* 94000 yen
04-04-2012, 08:24 AM   #10
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QuoteOriginally posted by nirVaan Quote
yea i really like the tamron but its big.i want one that i can carry always and over here in japan Tamron is 64000yen and DA* 94000 yen
Then get the Sigma 50-150/2.8. I have one and love it. I always look out for them and they seem to come up for sale on the various forums about one every 1-2 months on average. If you are in Japan you should surely be able to find them quicker than that. They are worth the wait.
04-04-2012, 08:53 AM   #11
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Anytime I don't have the Sigma 30mm 1.4 on my camera (it's on most of the time), it's probably because I'm using the 50-150mm 2.8. Between those two lenses, my trusty old Tamron 28-75mm 2.8 doesn't get any use outside the studio these days. The 50-150mm is an Incredible lens, but too bad it was produced for such a short time.

If you really want one, your best bet is to setup a saved-search on eBay to be automatically notified when one is listed, and then be prepared to battle it out with other bidders. I don't ever plan on selling mine, but if I were forced to sell it for some reason, I don't think I would let it go for less than $1500. I value it too much, and there's just nothing out there that can replace it. The Pentax 50-135mm comes close, but the AF speed is much slower, it's not as long, and I don't trust the reliability of the SDM.

However, if the 50-150mm never existed, I'm sure I would probably own the 50-135mm.

Last edited by Edgar_in_Indy; 04-05-2012 at 08:29 PM.
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