Main
Model
Price
Advantages
launch
Announced
Body type
Camera subcategory
Sensor
Effective pixels
Max resolution
Sensor size
Sensor type
Processor
Image ratio w:h
Other resolutions
Sensor photo detectors
Image
ISO
Boosted ISO (maximum)
White balance presets
Custom white balance
Image stabilization
Uncompressed format
JPEG quality levels
Photography features
Minimum shutter speed
Maximum shutter speed
Aperture priority
Shutter priority
Manual exposure mode
Subject / scene modes
Built-in flash
Flash range
External flash
Flash modes
Continuous drive
Self-timer
Metering modes
Exposure compensation
AE Bracketing
WB Bracketing
Screen / viewfinder
Articulated LCD
Screen size
Screen dots
Touch screen
Screen type
Live view
Viewfinder type
Viewfinder coverage
Viewfinder magnification
Videography features
Resolutions
File Format
Microphone
Optics & Focus
Autofocus
Digital zoom
Manual focus
Number of focus points
Lens mount
Focal length multiplier
Physical
Weight (inc. batteries)
Dimensions
Environmentally sealed
Battery
Battery details
Battery Life (CIPA)
Storage
Storage types
Storage included
Connectivity
USB
HDMI
Wireless
Remote control
Other features
Orientation sensor
Timelapse recording
GPS
GPS notes
Samples
Videos
Summary
The D5100 maximum resolution of 4928 x 3264 pixels (16 megapixels) is better in comparison with the D90 highest resolution of 4288 x 2848 pixels (12 megapixels). The D90 has larger sensor compared to the D5100: APS-C (23.6 x 15.8 mm) versus APS-C (23.6 x 15.7 mm). This is the most significant specification of this model because big sensor allows the camera owner to produce pictures of the higher quality. The D5100 offers a wider ISO range of 100-6400 in compare with 200-3200 ISO range of the D90. This ISO range let the camera owner to produce better pictures in low light situations.
The D5100 is equipped with swiveling display that will let the camera owner to take images from any interesting angle. The D5100 screen is better as it offers more screen dots 921,000 in compare to 920,000 dots of the D90 display. The higher dot count screen is better for reviewing photos on your camera.
The D5100 weighs 560g that is 143g lighter in comparison with the weight of the Nikon D90.
The D5100 has 8 advantages and the D90 only 3 so the D5100 will become the best buy. Get the list of the best offers on Amazon.