Comparison of Laowa 10-18mm f/4.5-5.6 FE Zoom and Tamron 17-28mm f/2.8 Di III RXD (Model A046)

Attribute	Tamron 17-28mm f/2.8 Di III RXD (Model A046) ×	Laowa 10-18mm f/4.5-5.6 FE Zoom ×
Filter Size (mm)	67	37
Notes	Available mounts: Sony FE-mount; Moisture-resisteant construction	Available Mounts: Sony FE-mount; Canon RF and Nikon Z coming soon
Closest Focus (m)	0.19	0.15
Magnification Ratio (x)	0.19	0.25
Diaphragm Blades Type	circular	-
Type	Wide Zoom	Wide Zoom
APS Equivalent	-	1.5x: 15 - 27mm
Zoom System	Rotary	Rotary
Image Circle	Image Circle	35mm
Focal Length (mm)	17.00 - 28.00	10.00 - 18.00
Brand	Tamron	Laowa
Name	Tamron 17-28mm f/2.8 Di III RXD (Model A046)	Laowa 10-18mm f/4.5-5.6 FE Zoom
Weight (g)	420	496
Aperture (f)	2.80 - 22.00	4.50 - 22.00
Diaphragm Blades	9	5
Diagonal Angle of View (degree)	76.40 - 104.70	102.00 - 130.00
Lens Construction	13 elements in 11 groups, including 2 LD (Low Dispersion), 1 XLD (Extra Low Dispersion) and 3 aspherical elements	14 elements in 10 groups, including 1 ED and 2 aspherical elements
Diameter (mm)	73	70
Length (mm)	99	90.9
35mm Equivalent	1.5x: 25.5 - 42mm; 1.6x: 27.2 - 44.8mm	-
Focus Details	Internal via RXD (Rapid eXtra-silent stepping Drive) with DMF (Direct Manual Focus)	Internal; Manual focus only