Is the Samyang 20mm F1.8 a Autofocus lens?

Is the Samyang 20mm F1.8 ED AS UMC Weather Sealed

$599.00

Samyang 20mm F1.8 ED AS UMC Alternatives in Pentax KAF Mount

Model		Focal Length	Max Aperture	Weight	Focusing	Price
	HD Pentax DA 21mm F3.2 AL Limited	21mm	F3.2	134gr	AF	$249.55
Compare with Samyang 20mm F1.8 ED AS UMC
	Pentax smc DA 21mm F3.2 AL Limited	21mm	F3.2	140gr	AF	$249.55
Compare with Samyang 20mm F1.8 ED AS UMC
	Samyang 16mm f2.0 ED AS UMC CS	16mm	F2.0	583gr	MF	$329.00
Compare with Samyang 20mm F1.8 ED AS UMC
	Voigtlander 20mm F3.5 Color Skopar SL II	20mm	F3.5	205gr	MF	$499.99
Compare with Samyang 20mm F1.8 ED AS UMC
	Samyang 24mm f1.4 ED AS UMC	24mm	F1.4	580gr	MF	$499.00
Compare with Samyang 20mm F1.8 ED AS UMC
	Samyang T-S 24mm f3.5 ED AS UMC	24mm	F3.5	680gr	MF	$629.00
Compare with Samyang 20mm F1.8 ED AS UMC
	Carl Zeiss Distagon T 2,821	21mm	F2.8	600gr	MF	$694.00
Compare with Samyang 20mm F1.8 ED AS UMC
	Carl Zeiss Distagon T 3,518	18mm	F3.5	470gr	MF	$1,395.00
Compare with Samyang 20mm F1.8 ED AS UMC
	Sigma 20mm F1.8 EX DG Aspherical RF	20mm	F1.8	520gr	AF	$404.99
Compare with Samyang 20mm F1.8 ED AS UMC
	Sigma 24mm F1.8 EX DG Aspherical Macro	24mm	F1.8	485gr	AF	$289.99
Compare with Samyang 20mm F1.8 ED AS UMC
	Rokinon 24mm f1.4 Aspherical	24mm	F1.4	580gr	MF	$479.00
Compare with Samyang 20mm F1.8 ED AS UMC

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