. 24.2MP CMOS sensor with no optical low-pass filter
. Ultra-compact and lightweight body
. Multi-CAM 4800DX 39-point autofocus system
. 2,016-pixel RGB metering sensor, used for 3D subject tracking in AF-C
. Sensitivity range of ISO 100-25,600
. 5 fps continuous shooting
. 1/4000 sec maximum shutter speed
. 3.2", 1.2M dot fully-articulating touchscreen LCD display
. 1080/60p video with clean output over HDMI and Flat Picture Control
. Built-in Wi-Fi
The D5500 uses the same 24.2 CMOS sensor as the D5300 which in this respect it will replicate the great quality experienced with D5300. On the other hand its top ISO setting of 25,600 is no longer an extension as previously experienced with D5300. There is still no optical low-pass filter in front of the sensor. Optical low pass filters tend to reduce moiré at the expense of image quality. These filters have been used in the past by major DSLR manufacturers including Nikon however, in the new era of post production as well as new sensor technologies, DSLR manufacturers have started to dropping this filter from their product lines. The D5500 has also uses the latest Nikon Expeed 4 image processing engine.
The design of the D5500 has improved by using the latest monocoque design concept. D5500 has single unit body feels, This has also 'increases durability without weighing it down' according to Nikon. The camera is now very light and compact. It is 15% less heavier comparing to D5300 The grip is now much deeper comparing to D5300 which makes it to be held better. Nikon has also added touch functionality and a unique interface to make it easier to work with.
In the video department the D5500 continue to support 1080 at 60p. Nikon has added Flat picture control which allows for easier color grading in post-production.
The only feature that is missing from D5500 is the built in GPS functionality.
The camera has gotten a new eye sensor in order to probably save more battery. The eye sensor turn the LCD off as soon as you taking photo with the viewfinder. The battery life has also improved by 35% compared to its predecessor, using the same battery.