Comparison of Canon EF 15mm f/2.8 Fisheye and Canon EF 8-15mm ƒ/4L USM Fisheye

Attribute	Canon EF 8-15mm ƒ/4L USM Fisheye ×	Canon EF 15mm f/2.8 Fisheye ×
Diagonal Angle of View (degree)	175.50 - 180.00	180.00
Notes	Included Accessories: lens hood, case	Fixed, petal-type hood; rear gelatin filter holder
Aperture (f)	4.00 - 22.00	2.80 - 22.00
Closest Focus (m)	0.16	0.2
Magnification Ratio (x)	0.39	0.14
Type	Wide Zoom Fisheye	Fisheye Prime
Focus Details	Inner focusing; Ultra-sonic Motor (USM) with AF/MF switch	Focus Details
APS Equivalent	13 - 24mm	24mm
Diaphragm Blades	7	5
Image Circle	35mm	35mm
Focal Length (mm)	8.00 - 15.00	15.00
Brand	Canon	Canon
Name	Canon EF 8-15mm ƒ/4L USM Fisheye	Canon EF 15mm f/2.8 Fisheye
Weight (g)	540	330
Diameter (mm)	78.5	62
Length (mm)	83	73
Zoom System	Rotary	-
Lens Construction	14 elements in 11 groups, including UD and aspherical elements	8 elements in 7 groups