Comparison of Panasonic DMW-STC14 1.4X and Pentax 1.4X-L

Attribute	Pentax 1.4X-L ×	Panasonic DMW-STC14 1.4X ×
Type	Teleconverter	Teleconverter
Name	Pentax 1.4X-L	Panasonic DMW-STC14 1.4X
Weight (g)	175	180
Image Circle	35mm	35mm (L-Mount)
Brand	Pentax	Panasonic
Magnification Ratio (x)	1.4	1.4
Lens Construction	5 elements in 5 groups	7 elements in 4 groups, including 2 UHR (Ultra High Refractive Index) elements
Notes	Usable Lenses: SMC Pentax A-, F-, M-lenses	Splash, Dust, and Freezeproof design; Compatible with select L-Mount lenses
Diameter (mm)	65.5	65.3
Focal Length Multiplier	1.4X that of the master lens	1.4X that of the master lens
Effective Reduction in Aperture	1 f-stop	1 f-stop
Length (mm)	28.5	27.6