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	1.0m (3.3ft)	1.1m (3.6ft)	1.4m (4.67ft)
	distance
	Maximum	Approx. 0.17×	Approx. 0.24×	Approx. 0.28×
	magnification	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

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Contents Smc PENTAX-DA Interchangeable Lens Foreword Using Your Lens Safely Precautions and Lens Maintenance CONTENTS3 Attaching the Lens Hood Precautions When Using the Lens with a Flash Features of the smc PENTAX-DA Lens Smc PENTAX-DA Lens KAF-mount KAF2-mount KAF3-mount About the DA lens mountSupersonic motor compatible camera body About lenses with a supersonic motorHow to Check and Update the Firmware To mount the lens on the camera body Mounting and Removing the LensMemo To remove the lensLens CAP Attaching the dedicated lens cap to DA 40mm f/2.8 Limited For the DA lens FocusingChanging the Focus Mode Focusing with the OK Button Using AutofocusDA 18-250mm f/3.5-6.3ED AL if Using the Quick-Shift Focus System Using Manual FocusUsing Autofocus How to use the Quick-Shift Focus SystemMemo DA 200mm f/2.8ED if SDM, DA 300mm f/4ED if SDM focusing Close-distance scale Zoom Lens About the zoom ring Red line About the zoom lock switchMagnification Scale Macro LensScrew-on Type DA 70mm f/2.4 Limited dedicated lens hood Attaching the Lens HoodLens hood attaching index Bayonet Type DA 21mm f/3.2 AL Limited dedicated lens hood About the PL filter window How to use the lens hood with polarizing filter window Built-in lens hood Filters Precaution on filtersPage Memo Circular polarizing filters and vignetting Compatibility table for Pentax circular polarizing filters SDM YES Memo External Flash Built-in FlashZDA 14mm f/2.8ED if ZDA 21mm f/3.2 AL LimitedZDA 16-50mm f/2.8ED AL if SDM zDA 16-45mm f/4ED AL ZDA 12-24mm f/4ED AL ifCompatibility of DA Lenses with the Built-in Flash Compatibility Lens DA 50-200mm f/4-5.6ED Camera position shift lock screw Tripod Mount Tripod MountRemoving the Tripod Mount Main Specifications Lens DA 40mm f/2.8 Limited DA 70mm f/2.4 Limited 300mm equivalent to Lens DA 16-45mm f/4ED AL DA18-55mm f/3.5-5.6 AL DA 50-135mm f/2.8ED if SDM Statement of FCC Compliance Memo CE Mark is a Directive conformity mark of the European Union