LCD and Viewfinder
Nikon D90 has a Fixed Type 3″ LCD screen with a resolution of 920k dots. Both the screen size and the screen resolution is up to the standards of this class.
D90 has a built-in Optical (pentaprism) viewfinder.
The viewfinder has a coverage of 96% and a magnification ratio of 0.64x.
Nikon D90 can shoot continuously at max speed of 4.5 fps and has max shutter speed of 1/4000 sec . D90 has a built-in flash, and you can also mount your external flashes too.
Nikon D90 features both Contrast Detection and Phase Detection autofocus (AF) systems which ensures speed and accuracy of focusing in most situations. The AF system has 11 points to choose from.
With Nikon D90, you can record your videos at a highest resolution of 1280 x 720 at 24 fps and save in and Motion JPEG formats. 1280 x 720 is a low video resolution by todays standards. If video quality is important for you, we recommend you to look at cameras with Full HD, even better 4K / Ultra-HD resolution . D90 has a built-in Mono microphone but no speaker.
Nikon D90 doesn't have any connections for external microphones and headphones. If you need a DSLR camera with external microphone connectivity, consider Nikon D7500 or Sony SLT-A77 II in a similar price range.
Connectivity and Storage
You can connect your camera to other devices through HDMI port or via USB 2.0 (480 Mbit/sec) port.
Battery Nikon D90 is powered by EN-EL3e battery which provides a shooting life of 850 according to CIPA standards.
Considering that the average battery life of DSLR type cameras is 877 shots, its battery life is about average in its class but it would still be wise to invest in some spare batteries for long photo trips.
Battery Life Comparison in Semi-Pro DSLR Cameras
Nikon Df with its 1400shots is the model with longest battery life among Semi-Pro DSLR cameras. Check the comparison of Nikon D90 vs Nikon Df or take a look at Longest Battery Life DSLR cameras list.
You can download Nikon D90's User Manual here
Current Lowest price for Nikon D90 is $1,199.00