Pentax HD Pentax D FA 24-70mm F2.8 ED SDM WR vs Sigma 17-50mm f/2.8 EX DC OS HSM

Side-by-side comparison from our catalogue data. Better values are highlighted only where a clear difference exists.

Pentax

HD Pentax D FA 24-70mm F2.8 ED SDM WR

Sigma

17-50mm f/2.8 EX DC OS HSM

Verdict at a glance

Sigma 17-50mm f/2.8 EX DC OS HSM is lighter by 222g.
Sigma 17-50mm f/2.8 EX DC OS HSM goes wider (17mm vs 24mm).
Pentax HD Pentax D FA 24-70mm F2.8 ED SDM WR reaches further (70mm vs 50mm).

Specification comparison
Spec	HD Pentax D FA 24-70mm F2.8 ED SDM WR	17-50mm f/2.8 EX DC OS HSM
Brand	Pentax	Sigma
Mount	Pentax K	Pentax K
Type	Zoom	Zoom
Focal length	24-70mm	17-50mm (wider)
Max aperture	f/2.8	f/2.8
Weight g	787	565 (lighter)
Filter mm	82	77
Length mm	110.0	91.8
Diameter mm	89.0	83.5
Min focus m	0.38	0.28 (closer focusing)
Blades	n/a	7
Format	n/a	aps-c
Groups	n/a	13
Af motor	n/a	HSM
Elements	n/a	17
Stabilized	n/a	Yes
Max magnification	n/a	0.2

Pentax HD Pentax D FA 24-70mm F2.8 ED SDM WR

An f/2.8 standard zoom for Pentax full-frame with weather resistance. It uses SDM and HD coating.

Pros

Constant f/2.8
Weather-resistant
HD coating

Cons

Heavy
No stabilization in lens

Sigma 17-50mm f/2.8 EX DC OS HSM

Sigma 17-50mm f/2.8 EX DC OS HSM: an APS-C fast standard zoom lens with a 17-50mm focal length and a maximum aperture of f/2.8, made for Pentax K mount cameras, with Optical Stabilizer and Hyper Sonic Motor autofocus. A bright standard zoom for APS-C cameras with a constant f/...

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