Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary vs 120-400mm f/4.5-5.6 APO DG OS HSM

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

Sigma

100-400mm f/5-6.3 DG OS HSM Contemporary

f/5

Full specs

Sigma

120-400mm f/4.5-5.6 APO DG OS HSM

f/4.5HSM

Full specs

Pick the 100-400mm f/5-6.3 DG OS HSM Contemporary if

You want a wider view: 100mm vs 120mm at the wide end

Pick the 120-400mm f/4.5-5.6 APO DG OS HSM if

You need ⅓ stop more light for low light or background blur (f/4.5 vs f/5)

Spec differences

10 differences

Specifications that differ between the Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary and the Sigma 120-400mm f/4.5-5.6 APO DG OS HSM
	100-400mm f/5-6.3 DG OS HSM Contemporary	120-400mm f/4.5-5.6 APO DG OS HSM
Format	not listed	Full frame
Focal length	100-400mm	120-400mm
Max aperture	f/5	f/4.5 ⅓ stop faster
Filter thread	not listed	77 mm
Min focus distance	not listed	1.5 m
Max magnification	not listed	0.24×
Aperture blades	not listed	9
Optical design	not listed	21 elements / 15 groups
Autofocus motor	not listed	HSM
Image stabilization	not listed	Yes

3 identical specs hidden: brand, mount, type. Show all

Brand: Sigma both
Mount: Pentax K both
Type: Telephoto Zoom both

Our notes

Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary

This 100-400mm f/5-6.3 full-frame telephoto zoom lens from Sigma fits Pentax K mount cameras, from the Sigma Contemporary line with Optical Stabilizer and Hyper Sonic Motor autofocus. A long-reach telephoto zoom aimed at sports and wildlife.

Our notes