Pentax smc DA 50-200mm F4-5.6 ED 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

Verdict at a glance

Sigma 17-50mm f/2.8 EX DC OS HSM is faster by 1 stop (f/2.8 vs f/4.0), letting in more light.
Pentax smc DA 50-200mm F4-5.6 ED WR is lighter by 280g.
Sigma 17-50mm f/2.8 EX DC OS HSM goes wider (17mm vs 50mm).
Pentax smc DA 50-200mm F4-5.6 ED WR reaches further (200mm vs 50mm).

Specification comparison
Spec	smc DA 50-200mm F4-5.6 ED WR	17-50mm f/2.8 EX DC OS HSM
Brand	Pentax	Sigma
Mount	Pentax K	Pentax K
Type	Zoom	Zoom
Focal length	50-200mm	17-50mm (wider)
Max aperture	f/4.0	f/2.8 (faster)
Format	aps-c	aps-c
Weight g	285 (lighter)	565
Filter mm	49	77
Length mm	80.0	91.8
Diameter mm	69.0	83.5
Min focus m	1.1	0.28 (closer focusing)
Blades	n/a	7
Groups	n/a	13
Af motor	n/a	HSM
Elements	n/a	17
Stabilized	n/a	Yes
Max magnification	n/a	0.2

Pentax smc DA 50-200mm F4-5.6 ED WR

A compact weather-resistant telephoto zoom for Pentax APS-C bodies, weighing about 285 g. It focuses as close as 1.1 m.

Pros

Light at about 285 g
Weather resistant
Compact
Close focus 1.1 m

Cons

Slow aperture
APS-C only
Less reach than 55-300

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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