Sony DT 30mm F2.8 Macro SAM vs Sony DT 50mm F1.8 SAM

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DT 30mm F2.8 Macro SAM compared with DT 50mm F1.8 SAM

	SonyDT 30mm F2.8 Macro SAM	SonyDT 50mm F1.8 SAM
Overview
Released
Released	October 2009	June 2009
Optics
Lens type
Lens type	Prime	Prime
Focal length
Focal length	30 mm	50 mm
Maximum aperture
Maximum aperture	f/2.8	f/1.8
Minimum aperture
Minimum aperture	f/22	f/22
Macro lens
Macro lens	Yes	–
Optical construction
Optical construction	Six elements in five groups	Six elements in five groups
Diaphragm
Diaphragm	Seven blades; circular aperture	Seven blades; circular aperture
Angle of view
Angle of view	50° on APS-C	32° on APS-C
Mount and compatibility
Mounts
Mounts	Sony A	Sony A
Image circle
Image circle	APS-C	APS-C
Image circle detail
Image circle detail	APS-C A-mount coverage; 45 mm equivalent field of view; Sony excludes film SLR use	Designed for APS-C A-mount cameras; 75 mm equivalent field of view
Teleconverter support
Teleconverter support	Sony 1.4× and 2× teleconverters unsupported	Sony 1.4× and 2× teleconverters unsupported
Focus and stabilisation
Autofocus
Autofocus	Yes	Yes
Minimum focus distance
Minimum focus distance	0.129 m	0.34 m
Maximum magnification
Maximum magnification	1×	0.2×
Autofocus detail
Autofocus detail	Built-in SAM (Smooth Autofocus Motor); autofocus available from infinity to life-size reproduction	Built-in SAM (Smooth Autofocus Motor); direct manual focusing unsupported (OpticalLimits)
Focus distance detail
Focus distance detail	0.129 m minimum focus measured from the sensor plane; approximately 2 cm working distance from the lens front at closest focus	Focus ring rotates during autofocus and the inner barrel extends when focusing (OpticalLimits)
Magnification detail
Magnification detail	1.0× maximum reproduction ratio	0.20× maximum reproduction ratio
Stabilisation detail
Stabilisation detail	–	Sony describes use with A-mount camera-body stabilisation
Design
Filter diameter
Filter diameter	49 mm	49 mm
Maximum diameter
Maximum diameter	70 mm	70 mm
Length
Length	45 mm	45 mm
Weight
Weight	150 g (better)	170 g
Controls
Controls	AF/MF switch; focus ring rotates during autofocus (What Digital Camera)	AF/MF switch (Photo Review)
Filter detail
Filter detail	–	49 mm non-rotating filter thread (OpticalLimits)
Dimensions detail
Dimensions detail	70 mm maximum diameter × 45 mm length	70 mm maximum diameter × 45 mm length
Weight detail
Weight detail	Approximately 150 g, maker lens weight	Approximately 170 g, maker lens weight
Lens hood
Lens hood	No lens hood specified	No lens hood supplied
Release detail
Release detail	Sony specifies October 2009 availability in Hong Kong and 22 October 2009 sale in Japan.	Sony specifies 25 June 2009 availability in Japan; its US announcement describes July availability.