Sigma 24-105mm f/4 DG OS HSM Art vs 18-125mm f/3.8-5.6 DC OS HSM

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

Sigma

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

You shoot full frame: the 18-125mm f/3.8-5.6 DC OS HSM is made for APS-C
You care about the shape of out-of-focus highlights: 9 aperture blades vs 7

Pick the 18-125mm f/3.8-5.6 DC OS HSM if

You want a wider view: 18mm vs 24mm at the wide end
You need more reach: 125mm vs 105mm at the long end
You shoot close-ups: it focuses down to 0.35 m vs 0.45 m
You want bigger close-ups: 0.26× vs 0.22× maximum magnification

Spec differences

12 differences

Specifications that differ between the Sigma 24-105mm f/4 DG OS HSM Art and the Sigma 18-125mm f/3.8-5.6 DC OS HSM
	24-105mm f/4 DG OS HSM Art	18-125mm f/3.8-5.6 DC OS HSM
Type	Zoom	Superzoom
Format	Full frame	APS-C
Focal length	24-105mm	18-125mm
Max aperture	f/4	f/3.8
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	0.35 m closer
Max magnification	0.22×	0.26× larger
Aperture blades	9 more blades	7
Optical design	19 elements / 14 groups	16 elements / 12 groups

4 identical specs hidden: brand, mount, autofocus motor, image stabilization. Show all

Brand: Sigma both
Mount: Pentax K both
Autofocus motor: HSM 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