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

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

	Sony50mm F2.8 Macro	SonyDT 50mm F1.8 SAM
Overview
Released
Released	July 2006	June 2009
Optics
Lens type
Lens type	Prime	Prime
Focal length
Focal length	50 mm	50 mm
Maximum aperture
Maximum aperture	f/2.8	f/1.8
Minimum aperture
Minimum aperture	f/32	f/22
Macro lens
Macro lens	Yes	–
Optical construction
Optical construction	Seven elements in six groups; double-floating focus design	Six elements in five groups
Diaphragm
Diaphragm	Seven rounded blades	Seven blades; circular aperture
Angle of view
Angle of view	47° full-frame; 32° APS-C	32° on APS-C
Mount and compatibility
Mounts
Mounts	Sony A	Sony A
Image circle
Image circle	Full frame	APS-C
Image circle detail
Image circle detail	Full-frame A-mount coverage; 75 mm equivalent field of view on APS-C	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	0.2 m	0.34 m
Maximum magnification
Maximum magnification	1×	0.2×
Autofocus detail
Autofocus detail	Camera-driven screw autofocus (OpticalLimits); auto-clutch keeps focus ring stationary during AF	Built-in SAM (Smooth Autofocus Motor); direct manual focusing unsupported (OpticalLimits)
Focus distance detail
Focus distance detail	0.2 m minimum focus; double-floating mechanism maintains close-focus correction	Focus ring rotates during autofocus and the inner barrel extends when focusing (OpticalLimits)
Magnification detail
Magnification detail	Life-size 1.0× maximum magnification	0.20× maximum reproduction ratio
Stabilisation detail
Stabilisation detail	No lens stabilisation specification published in read maker pages; body stabilisation compatibility is camera-dependent	Sony describes use with A-mount camera-body stabilisation
Design
Filter diameter
Filter diameter	55 mm	49 mm
Maximum diameter
Maximum diameter	71.5 mm	70 mm
Length
Length	60 mm	45 mm
Weight
Weight	295 g	170 g (better)
Controls
Controls	Focus-hold button and focus-range limiter	AF/MF switch (Photo Review)
Filter detail
Filter detail	55 mm front filter thread	49 mm non-rotating filter thread (OpticalLimits)
Dimensions detail
Dimensions detail	–	70 mm maximum diameter × 45 mm length
Weight detail
Weight detail	–	Approximately 170 g, maker lens weight
Lens hood
Lens hood	Maker lists no separate hood; front element is recessed	No lens hood supplied
Release detail
Release detail	Sony 6 June 2006 Alpha lens announcement, revised 12 July, specifies 21 July sale in Japan. Sony Store currently does not handle this historical lens.	Sony specifies 25 June 2009 availability in Japan; its US announcement describes July availability.