Sigma 24-105mm f/4 DG OS HSM Art vs Tamron 100-400mm f/4.5-6.3 Di VC USD

Both are Pentax K lenses. Here is what actually differs.

Sigma

Pick the Sigma 24-105mm f/4 DG OS HSM Art if

You need ⅓ stop more light for low light or background blur (f/4 vs f/4.5)
You want a wider view: 24mm vs 100mm at the wide end
You shoot close-ups: it focuses down to 0.45 m vs 1.5 m

Pick the Tamron 100-400mm f/4.5-6.3 Di VC USD if

You need more reach: 400mm vs 105mm at the long end

Spec differences

14 differences

Specifications that differ between the Sigma 24-105mm f/4 DG OS HSM Art and the Tamron 100-400mm f/4.5-6.3 Di VC USD
	Sigma 24-105mm f/4 DG OS HSM Art	Tamron 100-400mm f/4.5-6.3 Di VC USD
Brand	Sigma	Tamron
Type	Zoom	Telephoto Zoom
Format	Full frame	not listed
Focal length	24-105mm	100-400mm
Max aperture	f/4 ⅓ stop faster	f/4.5
Weight	885 g	not listed
Length	109.4 mm	not listed
Diameter	88.6 mm	not listed
Filter thread	82 mm	67 mm
Min focus distance	0.45 m closer	1.5 m
Max magnification	0.22×	not listed
Aperture blades	9	not listed
Optical design	19 elements / 14 groups	not listed
Autofocus motor	HSM	USD

2 identical specs hidden: mount, image stabilization. Show all

Mount: Pentax K both
Image stabilization: Yes both

Our notes

Sigma 24-105mm f/4 DG OS HSM Art

Sigma 24-105mm f/4 DG OS HSM Art: a full-frame standard zoom lens with a 24-105mm focal length and a maximum aperture of f/4, made for Pentax K mount cameras, from the Sigma Art line with Optical Stabilizer and Hyper Sonic Motor autofocus. The range covers everything from wide...

Our notes

Tamron 100-400mm f/4.5-6.3 Di VC USD

A 100-400mm f/4.5-6.3 full-frame telephoto zoom lens, the Tamron 100-400mm f/4.5-6.3 Di VC USD is designed for Pentax K mount bodies, with Vibration Compensation. The range suits sports, wildlife, events and portraits.