Sony Alpha 55

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Sony α55
SLT-A55V + SAL1680Z
Type	Digital single-lens translucent camera
Sensor	APS-C CMOS Sensor
Maximum resolution	16.2 megapixels
Lens	Interchangeable, A-mount
Flash	GN 10 at ISO 100
Shutter	Electronically controlled, Vertical-traverse, Focal-plane Shutter
Shutter speed range	30 – 1/4000 sec, bulb
Exposure metering	TTL full aperture exposure metering system 1200-zone evaluative
Exposure modes	Programmed AE (AUTO, AUTO – Flash Off, P), Aperture priority, Shutter priority, Manual, Scene selection
Metering modes	Multi-segment, Centre-weighted, Spot
Focus areas	15-point (12 line, 3 cross) phase-detection AF system
Focus modes	Single-shot AF, Automatic AF, Continuous AF, Manual Focus
Continuous shooting	10 FPS / 6 FPS
Viewfinder	EVF, 100% coverage, 1.10× magnification
ASA/ISO range	ISO equivalency 100 to 12,800 in 1.0 EV steps, boost to 25,600 in Multi-Frame Noise Reduction mode
Flash bracketing	+`
Custom WB	Auto / 6 presets / Colour Temperature/Colour Filter / Custom WB
Rear LCD monitor	3.0" TFT LCD, 921k dot resolution, variable-angle tilt/swivel
Storage	SD/SDHC/SDXC/Memory Stick Pro Duo
Battery	NP-FW50 Lithium-ion battery rechargeable battery
Dimensions	124 × 92 × 85 mm
Weight	441 g (15.6 oz)
Optional battery packs	Unavailable
Made in	Thailand
Footnotes	dpreview

The Sony α55 (model variants SLT-A55V with GPS, SLT-A55 without GPS depending on country) is a midrange-level SLT camera, released in August 2010.

A-mount, APS-C CMOS sensor

Sony Alpha 55 with Minolta AF 70-210mm f/4 "Beercan" lens

Its design is novel due to its being the first digital single-lens translucent camera (SLT), along with the Sony α33. As an SLT it employs a semi-transparent mirror instead of an opaque mirror, which enables phase detection auto focus in live view.

The design also replaces the optical viewfinder present in conventional DSLR with a high-resolution electronic viewfinder. The translucent mirror is fixed in position so does not have to flip up to take a still image, enabling rapid continuous shots of up to 10 frames per second. The static mirror also eliminates "mirror slap", the noise produced by the movement of the mirror during a shutter actuation, making the A55 quieter than standard DSLRs.

The A55 is one of the first four Sony Alpha DSLR / SLT cameras with video mode included, capable of 1080i. It is also capable of shooting 1080p at 30fps. The SLT design means that it is capable of using phase-detection autofocus during video recording. It has body-integrated image stabilization, and a 16.2 MPx APS-C CMOS sensor.

Model name	Ambient temperature	Image Stabilization
Model name	Ambient temperature	On	Off
α55 (SLT-A55V)	20 °C (68 °F)	9 min	Approx. 29 minutes
	30 °C (86 °F)	6 min	13 minutes
	40 °C (104 °F)	3 min	5 minutes
α33 (SLT-A33)	20 °C (68 °F)	11 min	Approx. 29 minutes
	30 °C (86 °F)	7 min	Approx. 22 minutes
	40 °C (104 °F)	4 min	9 minutes

Notes

External links

Media related to Sony SLT-A55 at Wikimedia Commons

Reviews

Minolta/Konica Minolta/Sony DSLR and SLT A-mount timeline

	Sensor	2004		2005				2006				2007				2008				2009				2010				2011				2012				2013				2014
		3	4	1	2	3	4	1	2	3	4	1	2	3	4	1	2	3	4	1	2	3	4	1	2	3	4	1	2	3	4	1	2	3	4	1	2	3	4	1
High-end	Full frame																		α900																					HV
																							α850												α99
Advanced	APS-C	DG-7D												α700																α77
Midrange																														α65
																										α55							α57
						DG-5D			α100													α550				α580										α58
																						α500				α560
																								α450
Entry-level																										α33				α35				α37
																α350					α380				α390
																α300					α330
																α200					α230				α290
Early models	Minolta 7000 with SB-70/SB-70S (1986) · Minolta 9000 with SB-90/SB-90S (1986) (Still video SLRs) Minolta MS-C1100 (1992) · Minolta RD-175 (1995)

Single-lens translucent (SLT) camera
HD video capable (Video AF)
Dual phase-detection AF (italic)

DSLR, SLT and MILC cameras with HD video (uncompressed – 4K resolution) mode (comparison)

Canon
EOS

High-end	5D Mark II (2008) 7D (2009) 1D Mark IV (2009) 1D X (2012) 5D Mark III^H (2012) 1D C (2012) 6D^HGW (2012)

Mid-range	500D (2009) 60D (2010) 550D (2010) 600D (2011) 650D^H (2012) EOS M (2012) 700D^H (2013) 70D^HW (2013) EOS M2 (2013)

Entry-level	1100D (2011) 100D (2013)

Nikon
D / 1 series

High-end	D300S^Tg (2009) D3S^Tg (2009) D800/D800E^THg (2012) D4^THg (2012) D600^THg (2012) D610^THg (2013)

Mid-range	D90^g (2008) D5000^Tg (2009) D7000^Tg (2010) D5100^THg (2011) 1 V1^TSFg (2011) 1 V2^TSFg (2012) D5200^THg (2012) D7100^THg (2013) D5300^THGW (2013)

Entry-level	D3100^g (2010) 1 J1^TSFg (2011) D3200^g (2012) 1 J2^TSFPg (2012) 1 S1^TSFPg (2013) 1 J3^TSFPg (2013) 1 AW1^TSFPg (2013) D3300^Pg (2014)

Olympus
Micro 4/3

Mid-range	E-M5 (2012) E-P5 (2013) E-M1 (2013)

Entry-level	E-PL1 (2010) E-P1 (2010) E-P2 (2010) E-PL2 (2011) E-PL3 (2011) E-P3 (2011) E-PM1 (2011) E-PL5 (2012) E-PM2 (2012)

Panasonic
Lumix

Mid-range	GH1 (2009) GH2 (2010) GH3^THW (2012) GM1^THW (2013) GH4^THW (2014)

Entry-level	GF1 (2009) G10 (2010) G2 (2010) GF2 (2010) G3 (2011) GX1 (2011) GF3 (2011) GF5 (2012) G5 (2012)

Pentax
K / Q series

Mid-range	K-7^TH (2009) K-5^THg (2010) K-30^THg (2012) K-5 II/K-5 IIs^THg (2012) K-50^THg (2013) K-3^THg (2013)

Entry-level	K-x^H (2009) K-r^THg (2010) Q^T (2011) K-01^THg (2012) Q10^T (2012) K-500^THg (2013) Q7^T (2013)

Samsung
NX series

Mid-range	NX5^Pg (2010) NX10^Pg (2010) NX11^Pg (2010) NX20^PgW (2012) Galaxy NX^PgW (2013)

Entry-level	NX100^Pg (2010) NX200^Pg (2011) NX1000^PgW (2012) NX210^PgW (2012) NX300^PgW (2013) NX1100^PgW (2013) NX2000^PgW (2013)

Sony
Alpha

High-end	α99V^HPG/α99^HP (2012) α7/α7R^HPWg (2013)

Mid-range	α580^HP (2010) α560^HP (2010) α55V^HPG/α55^HP (2010) α77V^HPG/α77^HP (2011) NEX-7^HP (2011) NEX-6^HPW (2011) α65V^HPG/α65^HP (2011) α57^HP (2012) α58^HP (2013)

Entry-level	NEX-3/NEX-3C^HP (2010) NEX-5/NEX-5C^HP (2010) α33^HP (2010) α35^HP (2011) NEX-5N^HP (2011) NEX-C3^HP (2011) NEX-F3^HP (2012) α37^HP (2012) NEX-5R^HPW (2012) NEX-5T^HPW (2013) α3000 (2013) α5000 (2014)

Leica M
Fujifilm X

High-end	Leica M (2012)

Mid-range	Fujifilm X-Pro1 (2012) Fujifilm X-E1 (2012) Fujifilm X-E2 (2013)

Entry-level	Fujifilm X-M1 (2013) Fujifilm X-A1 (2013)

Timelapse^T — Slow motion^S — Fast fps^F — HDR^H — Panorama^P — GPS^G(opt.)^g — WiFi^W

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