Comparison of Fujinon GF 100-200mm f/5.6 R LM OIS WR and Pentax 300mm f/4 ED IF SDM SMC DA*

Attribute	Pentax 300mm f/4 ED IF SDM SMC DA* ×	Fujinon GF 100-200mm f/5.6 R LM OIS WR ×
Filter Size (mm)	77	67
Notes	Included Accessories: PH-RBK Hood, Detachable Tripod Mount, Case	For Fujifilm G-mount; Optical Image Stabilization (5-stops); Weather, dust and freeze resistant
Length (mm)	184	183
Magnification Ratio (x)	0.24	0.2
Diameter (mm)	83	89.5
Closest Focus (m)	1.4	0.6
Focal Length (mm)	300.00	100.00 - 200.00
Diagonal Angle of View (degree)	5.40	15.60 - 30.60
Brand	Pentax	Fujinon
Image Circle	APS-C	Medium Format (Fujifilm G-mount)
Name	Pentax 300mm f/4 ED IF SDM SMC DA*	Fujinon GF 100-200mm f/5.6 R LM OIS WR
Weight (g)	1070	1050
Type	Telephoto Prime	Telephoto Zoom
Aperture (f)	4.00 - 32.00	5.60 - 32.00
Diaphragm Blades	9	9
Diaphragm Blades Type	-	rounded
Lens Construction	8 elements in 6 groups	20 elements in 13 groups, including 1 aspherical and 2 Super ED elements
Zoom System	-	Rotary
Focus Details	Internal, SDM (Supersonic Motor) with Quick-shift Focus System	Inner focusing mechanism; AF using a linear motor; Focus limiter switch
APS Equivalent	450mm	-
35mm Equivalent	-	79 - 158mm