Tamron SP 24mm f/2.5 Adaptall-2 vs Sigma 24mm f/1.8 EX DG ASPHERICAL MACRO

Both are Pentax K lenses for full frame. Here is what actually differs.

Tamron

SP 24mm f/2.5 Adaptall-2

f/2.5MF

Full specs

Sigma

24mm f/1.8 EX DG ASPHERICAL MACRO

f/1.8

Full specs

Pick the Tamron SP 24mm f/2.5 Adaptall-2 if

Our spec data shows no clear advantage for this lens.

Pick the Sigma 24mm f/1.8 EX DG ASPHERICAL MACRO if

You need 1 stop more light for low light or background blur (f/1.8 vs f/2.5)
You shoot close-ups: it focuses down to 0.18 m vs 0.25 m

Spec differences

8 differences

Specifications that differ between the Tamron SP 24mm f/2.5 Adaptall-2 and the Sigma 24mm f/1.8 EX DG ASPHERICAL MACRO
	Tamron SP 24mm f/2.5 Adaptall-2	Sigma 24mm f/1.8 EX DG ASPHERICAL MACRO
Brand	Tamron	Sigma
Type	Prime	Macro
Max aperture	f/2.5	f/1.8 1 stop faster
Filter thread	55 mm	77 mm
Min focus distance	0.25 m	0.18 m closer
Max magnification	not listed	0.37×
Aperture blades	not listed	9
Autofocus motor	Manual focus	not listed

5 identical specs hidden: mount, format, focal length, optical design, image stabilization. Show all

Mount: Pentax K both
Format: Full frame both
Focal length: 24mm both
Optical design: 10 elements / 9 groups both
Image stabilization: No both

Our notes

Tamron SP 24mm f/2.5 Adaptall-2

Tamron SP 24mm f/2.5 Adaptall-2: a wide-angle prime lens with a 24mm focal length and a maximum aperture of f/2.5, made for Pentax K mount cameras, from the Tamron SP series. The wide view suits landscapes, architecture and environmental shots.

Our notes