Pentax 21650, 21717, 21740, 21580, 21660, 21760, 21507 manual DA 50-135mm f/2.8ED if SDM

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Lens	DA 50-135mm f/2.8ED [IF] SDM	DA 50-200mm f/4-5.6ED	DA 55-300mm f/4-5.8ED
	50-135mm (equivalent to	50-200mm (equivalent to	55-300mm (equivalent to
Focal length	approx. 76.5-207mm in	approx. 76.5-306mm in	approx. 84.5-460mm in
	35mm format)	35mm format)	35mm format)
Elements in groups	18-14	11-10	12-8
Angle of view	31.5°–11.9°	31.5°–8.1°	29°–5.4°
Aperture	f/2.8	f/4–f/5.6	f/4–f/5.8
Minimum aperture	f/22	f/22–f/32	f/22–f/32
Mount type	KAF2-mount	KAF-mount	KAF-mount
Minimum focus	1.0m (3.3ft)	1.1m (3.6ft)	1.4m (4.67ft)
distance
Maximum	Approx. 0.17×	Approx. 0.24×	Approx. 0.28×
magnification
Filter size	67mm	52mm	58mm
Lens hood	PH-RBK 67mm	PH-RBB 52mm	PH-RBG 58mm
Max. Diameter	76.5mm × 136mm	66.5mm × 78.5mm	71mm × 111.5mm
× Length	(3.0in × 5.4in)	(2.6in × 3.1in)	(2.8in × 4.5in)
	Approx. 685g/24.2oz	Approx. 255g/9oz	Approx. 440g/15.52oz
Weight	(with hood approx. 765g/	(with hood approx. 285g/	(with hood approx. 470g/
	27.0oz)	10oz)	16.6oz)
Soft case	S90-160	S80-120	S80-160