Sigma 17-70mm f2.8-4.5 or Tamron 17-50mm f2.8 VC ??

[leeboy22001]

Hi,

I think I hijacked another thread, so decided to start my own

I've recently bought a second hand Sigma 17-70mm f2.8-4.5 DC Macro and have been very happy with it , but I ordered a new Tamron 17-50mm VC yesterday and don't know if I've wasted my money ?? Shots from the Sigma are sharp in my opinion, here are two shots I took today handheld with my 450D

One of my son @ 100 crop, 48mm, f5.6, 1/200sec, 580ex flash

http://i1017.photobucket.com/albums/af300/leeboy22001/Max/IMG_8371_100p.jpg

Another of a spider @ 100 crop, 70mm, f9.0, 1/400sec, 580ex flash

http://i1017.photobucket.com/albums/af300/leeboy22001/Creatures/spider.jpg

I realise these aren't wide open, but sharpness is no different.

 

[18-270]

images are too big :rules:

 

[woof woof]

You'll gain a constant f2.8 but lose 20mm. Personally I went for the constant f2.8.

The choice is yours....

 

[leeboy22001]

images are too big :rules:

First time showing pics :bonk: hope the link is better ?

 

[leeboy22001]

You'll gain a constant f2.8 but lose 20mm. Personally I went for the constant f2.8.

The choice is yours....

That is the choice :bang:, I've heard people have had bad copies and don't want to and up with a bad egg ! :thumbsdown:

 

[18-270]

First time showing pics :bonk: hope the link is better ?

As for the lens choice, the real performance comes when you don't use flash, the 2.8 will always win out there, also when it comes to controlling depth of field then the 2.8 will also win again.

 

[Walker]

I've got the VC Tamron. For what my two cents are worth ($0.02) I'm happy with it. Wide open it suffers a bit, but stopped down to f4 or 5.6 it seems to sharpen up. Always nice to have the f2.8 though!

 

[woof woof]

Lee, if you buy from a local specialist shop I'm sure that they'll be happy to swap a lens if you think you've got a bad copy.

Personally I think that "bad copies" are a lot rarer than some would have us believe

 

[leeboy22001]

I guess shooting without flash and at lower shutter speeds is a big test,I'll do some more test shots

The f2.8 all the way through from 17 to 50mm would be nice

 

[leeboy22001]

Lee, if you buy from a local specialist shop I'm sure that they'll be happy to swap a lens if you think you've got a bad copy.

Personally I think that "bad copies" are a lot rarer than some would have us believe

Thanks , I guess you only ever hear about the bad copies, never the good !