Sigma 24-70 f/2.8

[underexposure]

Hi everybody. I'm newbie using D70s, and i've few some question related to this lens.. This lens is about SGD750, and it does have constant aperutre at 2.8.

Any user of this lens and comment? Read from the online reviews, some said soft focus at wide open, then there is no use buying this lens if it does..

Another question about this lens is, does it support the i-TTL flash? does it provide the distance information to the camera??

[markccm]

Originally Posted by underexposure Hi everybody. I'm newbie using D70s, and i've few some question related to this lens.. This lens is about SGD750, and it does have constant aperutre at 2.8. Any user of this lens and comment? Read from the online reviews, some said soft focus at wide open, then there is no use buying this lens if it does.. Another question about this lens is, does it support the i-TTL flash? does it provide the distance information to the camera??

i have this lens for sale.
it's ok at F2.8

can let u try if u r interested in buying.
(in the East)

[espn]

Bbb, Mtl!!

[edrizal]

i own that lense too...nice. reasonably fast focus, built is robust, unlike those plastic shell like lense and the pic quality is good too. do feel free to browse my gallery

[wind30]

has anyone compared the sigma to the tamron 28-75 f2.8?

[TMC]

I find that tamron is sharper at 2.8 compared to the sigma. AF is about the same, build also.

[edwynfoo]

I bought this lens at Bangkok MBK. From my own informal testing, the lens is abit soft at F2.8 but still quite usable. It's 700g and quite bulky. Immediately I missed the weight of my Nikon 50mm 1.4 after I attached this "fat boy" on my D70. Browsed through some review online and it was mentioned that Tamron is sharper at F2.8. Macro wise Sigma is better. Stop down to F4 and it produce really nice portrait. Wonder if I can send the lense back to Sigma for recalibration to make it sharper at F2.8?

The 82mm filter was very ex man! I paid S$72 for the filter.

[lsisaxon]

Originally Posted by edwynfoo I bought this lens at Bangkok MBK. From my own informal testing, the lens is abit soft at F2.8 but still quite usable. It's 700g and quite bulky. Immediately I missed the weight of my Nikon 50mm 1.4 after I attached this "fat boy" on my D70. Browsed through some review online and it was mentioned that Tamron is sharper at F2.8. Macro wise Sigma is better. Stop down to F4 and it produce really nice portrait. Wonder if I can send the lense back to Sigma for recalibration to make it sharper at F2.8? The 82mm filter was very ex man! I paid S$72 for the filter.

Lens not sharp at fully open aperture is due to the optical design. Nothing they can calibrate. They will need to redesign the coma correction ==> more expensive lens.

[underexposure]

Originally Posted by markccm i have this lens for sale. it's ok at F2.8 can let u try if u r interested in buying. (in the East)

Thanks for your offer, but i'm staying in Malaysia, still looking for some reviews and hands on testing on this lens.

Originally Posted by wind30 has anyone compared the sigma to the tamron 28-75 f2.8?

But Sigma's is 24-70, abit wider then the Tamron 28-75... hmmm Is the 4 mm a big different in shooting wide?

Originally Posted by edrizal own that lense too...nice. reasonably fast focus, built is robust, unlike those plastic shell like lense and the pic quality is good too. do feel free to browse my gallery

Thanks man, your gallery is nice! Any more comment on this lens.. it's far cheaper then the nikkor for the same range...

[espn]

I'd prefer the Nikkor AF-S 28-70...

[markccm]

Originally Posted by underexposure Is the 4 mm a big different in shooting wide?

yes it is.

multiply out by the crop factor is 36mm
still quite ok.

good lens for events.
on film, it can be the main lens as it is 24mm wide & can zoom till 70mm

[yanyewkay]

$72 is cheap at 82mm.. that's the thing I don't like about the sigma. It uses the 82mm thread.

[roti_prata]

Originally Posted by markccm multiply out by the crop factor is 36mm

i dont know how u did ur math, a 9x crop factor makes 4mm 36mm.

[roti_prata]

hav u considered the tokina 28-80/2.8? its build is superb, not very sharp at f2.8 but peaks at f4(compared to most other lenses tt peak at f5.6 or f8) focusing is ok, quite loud compared to afs though

[lsisaxon]

Originally Posted by roti_prata i dont know how u did ur math, a 9x crop factor makes 4mm 36mm.

He was comparing the difference between a 24mm and a 28mm. 4 mm of difference. 24mm gives an equivalent angle of a 36mm. 28mm would give a 42mm equivalent angle.

[wind30]

Originally Posted by underexposure But Sigma's is 24-70, abit wider then the Tamron 28-75... hmmm Is the 4 mm a big different in shooting wide?

for me 24mm is not wide enough on a DSLR. I will be getting a 12-24 lens.

So I rather get a lens that is sharp at f2.8. Anyway I got my tamron 28-75. quite happy with its sharpness even wide open. Only at 75mm it is slightly soft but still very good.

[espn]

Originally Posted by wind30 for me 24mm is not wide enough on a DSLR. I will be getting a 12-24 lens. So I rather get a lens that is sharp at f2.8. Anyway I got my tamron 28-75. quite happy with its sharpness even wide open. Only at 75mm it is slightly soft but still very good.

PRO comment

[markccm]

Originally Posted by roti_prata i dont know how u did ur math, a 9x crop factor makes 4mm 36mm.

wow!!
u r good man.

4mm diff between 24mm - 28mm u can calculate until liddat.

dunno how u did ur maths to 9x also.

24mm x crop factor is 36mm.
no meh?

[markccm]

Originally Posted by lsisaxon He was comparing the difference between a 24mm and a 28mm. 4 mm of difference. 24mm gives an equivalent angle of a 36mm. 28mm would give a 42mm equivalent angle.

thank u.

u got it

[SEXiao]

MTl, go shopping liao............ but wait......... 24-70, 28-75, 28-70????.... hmmmm