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brr · 07-11-2008, 10:08 PM

Tamron 17-50 2,8 and Sigma 18-50 2,8 EX, which of these lenses will focus best in low light conditions?

cosmicheretic · 07-13-2008, 11:29 AM

Originally posted by brr

Tamron 17-50 2,8 and Sigma 18-50 2,8 EX, which of these lenses will focus best in low light conditions?

Please add the Pentax DA* 16-50 to that list for me as I will likely be getting one of the 3 soon.

Zewrak · 07-13-2008, 12:21 PM

The Sigma focuses quite well acctually. I have no experience with the Tamron.

Personally I would go for the Pentax one though. But thats only because of quick-shift.

brr · 07-13-2008, 12:30 PM

Originally posted by Zewrak

The Sigma focuses quite well acctually. I have no experience with the Tamron.

Personally I would go for the Pentax one though. But thats only because of quick-shift.

I have Sigma and i would not say it focuses well. To slow... some hunting too.

Zewrak · 07-13-2008, 12:36 PM

Originally posted by brr

I have Sigma and i would not say it focuses well. To slow... some hunting too.

Too slow is quite a subjective opinion, ofcourse. Too slow for what? I can focus rather well in a room with one or two ordinary lamps lit, on my running daughter.

On the other hand, we might have different versions. Mine is the Sigma DC 18-50 EX Macro f/2.8

brr · 07-13-2008, 12:39 PM

Mine too.
If I don`t have to shoot a report in low ligt than it`s more or less ok, but I have to ,than i`m a little bit disappointed.

Zewrak · 07-13-2008, 12:44 PM

Well, perhaps a DA* 16-50 is better for you, can't say really, never use zooms anymore.

I find the most rapid and quick focus system is your hands and manual focus, after some practice.

gawan · 07-13-2008, 02:10 PM

Don't know about the Sigma or Tamron, but my DA 16-50 seems to focus rather well and fast in a dark room.

A subjective test:

It focused as fast as you could say "zip". If I tried to spot focus to a dark non contrast spot I did not actually experienced any hunting - the lens just figured out what it could and focused there, speed compared you saying "zoom", i.e. not as fast as saying "zip", when focusing to a more contrasty spot in a dark room.

P.S. You are allowed to laugh to my test

07-11-2008, 10:08 PM	#1
brr Junior Member Join Date: Jul 2007 Location: Latvia, Riga Posts: 28	Low light (Sigma vs. Tamron) Tamron 17-50 2,8 and Sigma 18-50 2,8 EX, which of these lenses will focus best in low light conditions?

07-13-2008, 12:39 PM	#6
brr Junior Member Join Date: Jul 2007 Location: Latvia, Riga Posts: 28 Original Poster	Mine too. If I don`t have to shoot a report in low ligt than it`s more or less ok, but I have to ,than i`m a little bit disappointed. Last edited by brr; 07-13-2008 at 12:53 PM.

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07-13-2008, 11:29 AM	#2
cosmicheretic Inactive Account Join Date: Jul 2008 Location: Yorkton SK Canada Posts: 25	Originally posted by brr Tamron 17-50 2,8 and Sigma 18-50 2,8 EX, which of these lenses will focus best in low light conditions? Please add the Pentax DA* 16-50 to that list for me as I will likely be getting one of the 3 soon.

07-13-2008, 12:21 PM	#3
Zewrak Veteran Member Join Date: Mar 2008 Location: Nowhere, Sweden Photos: Gallery Posts: 654	The Sigma focuses quite well acctually. I have no experience with the Tamron. Personally I would go for the Pentax one though. But thats only because of quick-shift.

07-13-2008, 12:30 PM	#4
brr Junior Member Join Date: Jul 2007 Location: Latvia, Riga Posts: 28 Original Poster	Originally posted by Zewrak The Sigma focuses quite well acctually. I have no experience with the Tamron. Personally I would go for the Pentax one though. But thats only because of quick-shift. I have Sigma and i would not say it focuses well. To slow... some hunting too.

07-13-2008, 12:36 PM	#5
Zewrak Veteran Member Join Date: Mar 2008 Location: Nowhere, Sweden Photos: Gallery Posts: 654	Originally posted by brr I have Sigma and i would not say it focuses well. To slow... some hunting too. Too slow is quite a subjective opinion, ofcourse. Too slow for what? I can focus rather well in a room with one or two ordinary lamps lit, on my running daughter. On the other hand, we might have different versions. Mine is the Sigma DC 18-50 EX Macro f/2.8

07-13-2008, 12:44 PM	#7
Zewrak Veteran Member Join Date: Mar 2008 Location: Nowhere, Sweden Photos: Gallery Posts: 654	Well, perhaps a DA* 16-50 is better for you, can't say really, never use zooms anymore. I find the most rapid and quick focus system is your hands and manual focus, after some practice.

07-13-2008, 02:10 PM	#8
gawan Veteran Member Join Date: Jul 2007 Location: Helsinki Photos: Gallery Posts: 5,400	Don't know about the Sigma or Tamron, but my DA 16-50 seems to focus rather well and fast in a dark room. A subjective test: It focused as fast as you could say "zip". If I tried to spot focus to a dark non contrast spot I did not actually experienced any hunting - the lens just figured out what it could and focused there, speed compared you saying "zoom", i.e. not as fast as saying "zip", when focusing to a more contrasty spot in a dark room. P.S. You are allowed to laugh to my test

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Low light (Sigma vs. Tamron)

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