Pentax smc Pentax-DA* 50-135mm f/2.8 ED IF SDM 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

smc Pentax-DA* 50-135mm f/2.8 ED IF SDM

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 120g.
Sigma 17-50mm f/2.8 EX DC OS HSM goes wider (17mm vs 50mm).
Pentax smc Pentax-DA* 50-135mm f/2.8 ED IF SDM reaches further (135mm vs 50mm).

Specification comparison
Spec	smc Pentax-DA* 50-135mm f/2.8 ED IF SDM	17-50mm f/2.8 EX DC OS HSM
Brand	Pentax	Sigma
Mount	Pentax K	Pentax K
Type	Zoom	Zoom
Focal length	50-135mm	17-50mm (wider)
Max aperture	f/2.8	f/2.8
Released	2007	n/a
Blades	9	7
Format	aps-c	aps-c
Groups	14	13
Af motor	SDM	HSM
Elements	18	17
Weight g	685	565 (lighter)
Filter mm	67	77
Diameter mm	77.0	83.5
Max magnification	0.17	0.2
Length mm	n/a	91.8
Stabilized	n/a	Yes
Min focus m	n/a	0.28

Pentax smc Pentax-DA* 50-135mm f/2.8 ED IF SDM

The Pentax smc Pentax-DA* 50-135mm f/2.8 ED IF SDM is a fast short-telephoto zoom lens covering 50-135mm at f/2.8 for Pentax K mount cameras, with extra-low dispersion glass. A premium weather-resistant "Star" series lens for Pentax K-mount cameras.

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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