Sigma 17-70mm f/2.8-4 DC Macro OS HSM vs Tamron SP AF 28-75mm f/2.8 XR Di LD Aspherical [IF] Macro

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

Sigma

17-70mm f/2.8-4 DC Macro OS HSM

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Tamron

SP AF 28-75mm f/2.8 XR Di LD Aspherical [IF] Macro

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Verdict at a glance

Sigma 17-70mm f/2.8-4 DC Macro OS HSM goes wider (17mm vs 28mm).
Tamron SP AF 28-75mm f/2.8 XR Di LD Aspherical [IF] Macro reaches further (75mm vs 70mm).

Specification comparison
Spec	17-70mm f/2.8-4 DC Macro OS HSM	SP AF 28-75mm f/2.8 XR Di LD Aspherical [IF] Macro
Brand	Sigma	Tamron
Mount	Pentax K	Pentax K
Type	Macro	Macro
Focal length	17-70mm (wider)	28-75mm
Max aperture	f/2.8	f/2.8
Blades	n/a	7
Groups	n/a	14
Elements	n/a	16
Filter mm	n/a	67
Min focus m	n/a	0.33
Max magnification	n/a	0.26

Sigma 17-70mm f/2.8-4 DC Macro OS HSM

Sigma 17-70mm f/2.8-4 DC Macro OS HSM: an APS-C macro zoom lens with a 17-70mm focal length and a maximum aperture of f/2.8-4, made for Pentax K mount cameras, with Optical Stabilizer and Hyper Sonic Motor autofocus. It is intended for close-up work with small subjects such as...

Tamron SP AF 28-75mm f/2.8 XR Di LD Aspherical [IF] Macro

This 28-75mm f/2.8 full-frame macro zoom lens from Tamron fits Pentax K mount cameras, from the Tamron SP series with aspherical elements. It is intended for close-up work with small subjects such as flowers and insects.

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