Sony a900 vs Nikon D90

This is a full comparison between the cameras Sony a900 and Nikon D90. We compare them by looking at the categories you see below.

Manufacturing

Sony a900 is manufacturered by Sony but Nikon D90 is from Nikon. Both Sony and Nikon are well known brands though.

Type of camera

Both these cameras are DSLR cameras. No difference there.

Sensors / crop factor

These cameras have different sensors. Sony a900 has a "Sony Full Frame"-sensor while Nikon D90 has a "Nikon DX"-sensor, and their difference in sensors will also affect the crop factor and experience focal length. See the table below.

** Experienced focal length when using a lens such as a common "50mm f/1.8"

Learn more about crop factor and focal length multiplier here:
Camera selection can affect the focal length (Sony)
Camera selection can affect the focal length (Nikon)

Resolution

Sony a900 has a 25 MP (Megapixels) resolution while Nikon D90 has 12,3 MP. If we break down this in more detail this is the data behind the numbers:

Sony a900 has a 100 % larger resolution than Nikon D90. This could give you more details in the picture but also a possibility to crop more in the pictures, afterward while editing the pictures, if needed that is.

ISO range

Nikon D90 has a larger ISO-range than Sony a900. Nikon D90 has an ISO range that stretches from 200 to 6400 while Sony a900 has 100 to 1600.

Autofocus and lens compatibility

Both of these cameras have a built-in autofocus motor. Some lenses, that support autofocus, do not have an autofocus motor of their own but this won't cause any problems with these two cameras.

Here is a complete overview of which lenses work with each camera:
Lens compatibility chart for Sony a900
Lens compatibility chart for Nikon D90

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Sony a900 can shoot up to 5 pictures per seconds and Nikon D90 can shoot up to 4,5 pictures per seconds.

Ability to record movies

It is becoming more and more popular to record movies with digital cameras.

It is only one of these two cameras that support recording movies and movie clips and that is Nikon D90. Sadly, the Sony a900 does not support this.

Weight

The weight of the camera can be an extremely important factor, especially if the camera is about to be used, or carried around, for several hours at a time.

Sony a900 weighs 895 gr (equal to 1.97 lb) which is 27% heavier than Nikon D90 and its 703 gr (or 1.55 lb).

Sony a900 vs Nikon D90 Specs

Below you will find the complete and detailed technical specs for both Sony a900 and Nikon D90, next to each other. Each category of data is a link to an article covering the subject, giving you a deeper understanding so you can better understand the strengths and weaknesses of the two camera models.

Product	Sony a900	Nikon D90
Name	Sony a900	Nikon D90
Manufacturer	Sony	Nikon
Release Date and Price	Sony a900	Nikon D90
Release Year	2008	2008
Release Date	2008-09-09	2008-08-27
MSRP	2999 USD	899 USD
Buy it today
Camera Type	Sony a900	Nikon D90
Camera Type	DSLR	DSLR
Sensor	Sony a900	Nikon D90
Sensor Size	Full Frame (approx 36 x 24 mm)	APS-C (approx 23.7 x 15.5 mm) Also known as "DX"
Sensor Type	CMOS	CMOS
Resolution	6048 x 4032 pixels	4288 x 2848 pixels
Megapixels	25 MP	12,3 MP
Image Processor	Bionz	Nikon LSI (Large Scale Integration)
Image	Sony a900	Nikon D90
ISO Range	100 - 1600	200 - 6400
White Balance Presets	7	12
Custom White Balance	Yes	Yes
Image Stabilization	Yes (Sensor-Shift)	No
Image Stabilization CIPA Rating	0 stops	0 stops
Uncompressed format	RAW	RAW
Optics & Focus	Sony a900	Nikon D90
Autofocus Motor	Yes	Yes
Autofocus	Phase Detect Multi Area Center Selective Single Point Single Continuous	Contract Detect (sensor) Phase Detect Multi Area Selective Single Point Single Continuous Face Detection LiveView
Focus Points	9	11
Lens Mount	Sony A See Compatible Lenses	Nikon F See Compatible Lenses
Focal Length Multiplier	Full frame No multiplier Example: 24 mm remains 24 mm 50 mm remains 50 mm 100 mm remains 100 mm 200 mm remains 200 mm	DX / APS-C (1.5x) 1.5x multiplier Example: 24 mm becomes 36 mm 50 mm becomes 75 mm 100 mm becomes 150 mm 200 mm becomes 300 mm
Screen & Viewfinder	Sony a900	Nikon D90
Articulated LCD	Fixed	Fixed
Screen size	3”	3”
Screen dots	921600	920000
Touch screen	No	No
Screen type	TFT Xtra Fine color LCD	Super Density TFT color LCD with wide-viewing angle
Live view	No	Yes
Viewfinder Type	Optical (pentaprism)	Optical (pentaprism)
Viewfinder Coverage	100%	96%
Viewfinder Magnification	0.74x	0.96× (0.64× 35mm equiv.)
Viewfinder Resolution	N/A	N/A
Photography features	Sony a900	Nikon D90
Frames per second	5 fps	4,5 fps
Minimum Shutter Speed	30 seconds	30 seconds
Maximum Shutter Speed	1/8000 seconds	1/4000 seconds
Built-in Flash	No	Yes
Built-in Flash Range	N/A	17 meters
External Flash	Yes	Yes
Self-Timer	Yes	Yes
Time-lapse	No	Yes
Metering modes	Multi Center Weighted Spot	Multi Center Weighted Spot
Exposure Compensation	+/- 3 (at 1/3 EV steps)	+/- 5 (at 1/3 EV, 1/2 EV steps)
Videography features	Sony a900	Nikon D90
Video recording	No	Yes
Video format	N/A	MPEG4
Video resolution	N/A	1280 x 720
Built-in Microphone	No	Yes
Built-in Speakers	No	Yes
Storage	Sony a900	Nikon D90
Memory Card	Compact Flash Memory Stick Pro Duo	SD/SDHC
Connectivity	Sony a900	Nikon D90
HDMI Output	Yes	Yes
Microphone Port	No	No
Headphone Port	No	No
Wireless	No	Yes Eye-Fi Connected
Remote Control	Yes (Wired or Wireless (Optional))	Yes (Optional ML-L3 or MC-DC2)
GPS	No	Yes Optional
Body & Dimensions	Sony a900	Nikon D90
Enviromentally sealed	Yes	No
Battery	Battery Pack	Battery Pack
Battery Details	Lithium-Ion NP-FM500H rechargeable battery & charger	Lithium-Ion EN-EL3e rechargeable battery & charger
Battery Life (CIPA)	880 shots	850 shots
Width	156 mm	132 mm
Height	117 mm	103 mm
Depth	82 mm	77 mm
Weight	895 gram	703 gram