Tamron AF 70-300mm F/4-5.6 Di LD Macro vs Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary

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

Tamron

AF 70-300mm F/4-5.6 Di LD Macro

f/4

Full specs

Sigma

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

f/5

Full specs

Pick the Tamron AF 70-300mm F/4-5.6 Di LD Macro if

You need ⅔ stop more light for low light or background blur (f/4 vs f/5)
You want a wider view: 70mm vs 100mm at the wide end

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

You need more reach: 400mm vs 300mm at the long end

Spec differences

6 differences

Specifications that differ between the Tamron AF 70-300mm F/4-5.6 Di LD Macro and the Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary
	Tamron AF 70-300mm F/4-5.6 Di LD Macro	Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary
Brand	Tamron	Sigma
Focal length	70-300mm	100-400mm
Max aperture	f/4 ⅔ stop faster	f/5
Filter thread	62 mm	not listed
Min focus distance	0.95 m	not listed
Image stabilization	No	not listed

2 identical specs hidden: mount, type. Show all

Mount: Pentax K both
Type: Telephoto Zoom both

Our notes

Tamron AF 70-300mm F/4-5.6 Di LD Macro

The Tamron AF 70-300mm F/4-5.6 Di LD Macro is a full-frame telephoto zoom lens covering 70-300mm at f/4-5.6 for Pentax K mount cameras. The range suits sports, wildlife, events and portraits.

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.