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Sigma 28-70mm F2.8 Contemporary

RuleOfThirds said:
I ordered a new one today, with 5 year warranty.

But still torn whether to go for the new 24-70/2.8 and trade-in my 24-105. The 24-70 has almost the same weight (+60g) compared to the 24-105. After receiving my new 28-70 (couple of days) I have a 30 day return policy. 24-70 II has now a €150 Sigma cashback promotion, making the difference €300. €849 vs €1149.
Click to expand...

Where is that? Here in Spain it's €1349 less the €150 discount, so €1199.
 
This is just a personal thing, but it all depends on what/how you shoot. I don't really have the use for the 105mm end. I don't even use my Lumix 85mm 1.8 all that much, and that's the longest lens I own for my S5. So I'd personally go for the 2.8 zoom. As I like the larger aperture more. But that's just me.
I actually still own the Canon EF 24-105 L, never gelled with it on my Canon cameras, tried it on my S5 with an adaptor, nothing has changed :)
Now, if someone did a 17 or 18-50mm f2 or 2.8, my ears would prick up for sure
 
Received my brand spanking new 28-70, this one is more optical flawed than the previous 2nd hand item. But focus motor was quit though.. I have requested a return label.
PANA3328-2.jpg
  • Panasonic - DC-S5M2
  • 28 - 70mm F2.8 DG DN | Contemporary 021
  • 70.0 mm
  • ƒ/2.8
  • 1/80 sec
  • Pattern
  • Auto exposure
  • ISO 800
 
Markuswelder said:
There's got to be something wrong with your camera, to have killed 2 focus systems in 2 separate lenses.
Click to expand...
Focus and focus motor is just fine :), aberrations are not. It really only happens on close focus, but I think it Is not acceptable. My camera seems then to only devour Sigma 28-70 lenses... really love this lens, that's why I ordered a new one. But for this kind of money (full retail) this is unacceptable (at least by me). Also my last try on this lens.
 
I did some more tests, and it only happens on closest focus distance, at 70mm. If at 35mm I reframe the image so that the object is same size (only background differs), so with 35mm closer at the object this does not happen. If I'm like a meter away (more then double the min focus distance for 70mm) it is not happening. Can some owners try this ? closest focus possible on a black/white at 70/2.8 ? Then I know if this is normal for this lens design, or that is something wrong with it.

On my first entry today with the LoCa I wrote quit, but I ment quiet. So focus, and focus motor is good, fast and silent and spot on.
 
Christopher Frost's review does point out that close-up performance is not good (I think he used the term "dreadful") wide-open at 70mm. Better at 28, as you found.

 
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