Comparison of Panasonic LUMIX S 20-60mm F3.5-5.6 (S-R2060) and Pentax 20-40mm ƒ/2.8-4 ED Limited DC WR HD DA

Attribute	Panasonic LUMIX S 20-60mm F3.5-5.6 (S-R2060) ×	Pentax 20-40mm ƒ/2.8-4 ED Limited DC WR HD DA ×
Aperture (f)	3.50 - 22.00	2.80 - 32.00
Filter Size (mm)	67	55
Notes	Dust/splash-resistant; Included Accessories: front and rear lens caps, lens hood, storage bag.	HD coating, SP (Super Protect) coating; Weather-resistant construction
Closest Focus (m)	0.15	0.28
Magnification Ratio (x)	0.43	0.2
Zoom System	Rotary	Rotary
Type	Standard Zoom	Standard Zoom
APS Equivalent	30 - 90mm	30.5 - 61.5mm
Diaphragm Blades	9	9
Image Circle	35mm (L-Mount)	APS-C
Focal Length (mm)	20.00 - 60.00	20.00 - 40.00
Brand	Panasonic	Pentax
Name	Panasonic LUMIX S 20-60mm F3.5-5.6 (S-R2060)	Pentax 20-40mm ƒ/2.8-4 ED Limited DC WR HD DA
Weight (g)	350	283
Diaphragm Blades Type	circular	rounded
Lens Construction	11 elements in 9 groups (2 aspherical lenses, 3 ED lenses, 1 UHR lens); Fluorine coating on front element.	9 elements in 8 groups, including 1 ED and 1 SLD element
Diagonal Angle of View (degree)	40.00 - 94.00	39.00 - 70.00
Length (mm)	87.2	68.5
Diameter (mm)	77.4	71
Focus Details	Internal AF with linear motor; AF/MF switch	Quick-shift Focus; DC focus motor