Comparison of Pentax 55-300mm f/4-5.8 ED SMC DA and Sony SAL-75300 75-300mm f/4.5-5.6

Attribute	Sony SAL-75300 75-300mm f/4.5-5.6 ×	Pentax 55-300mm f/4-5.8 ED SMC DA ×
Magnification Ratio (x)	0.25	0.28
Filter Size (mm)	55	58
Focus Details	-	Quick-shift Focus System
Closest Focus (m)	1.5	1.4
Lens Construction	13 elements in 10 groups	12 elements in 8 groups, including ED elements
Length (mm)	122	111.5
Focal Length (mm)	75.00 - 300.00	55.00 - 300.00
Diagonal Angle of View (degree)	8.20 - 32.00	5.40 - 29.00
Brand	Sony	Pentax
Image Circle	35mm	APS-C
Name	Sony SAL-75300 75-300mm f/4.5-5.6	Pentax 55-300mm f/4-5.8 ED SMC DA
Weight (g)	460	440
Type	Telephoto Zoom	Telephoto Zoom
Notes	Included Accessories: SH0007 Lens Hood	Included Accessories: Lens Hood
APS Equivalent	112.5 - 450mm	82.5 - 450mm
Aperture (f)	4.50 - 38.00	4.00 - 32.00
Diaphragm Blades	7	6
Zoom System	Rotary	Rotary
Diameter (mm)	71	71