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Main
Model
Price
Advantages
SENSOR Max resolution: 6016 x 4016
SENSOR Sensor size: Full frame (35.9 x 24 mm)
IMAGE ISO: Auto, 100-12800, expandable to 50-51200
PHOTOGRAPHY FEATURES Continuous drive: 6.5 fps
SCREEN / VIEWFINDER Screen dots: 1,229,000
OPTICS & FOCUS Number of focus points: 51
PHYSICAL Environmentally sealed: Yes (Water and dust resistant)
PHYSICAL Battery Life (CIPA): 1230
OTHER FEATURES GPS: Optional
Main
Model
Price
Advantages
SCREEN / VIEWFINDER Articulated LCD: Fully articulated
SCREEN / VIEWFINDER Touch screen: Yes
PHYSICAL Weight (inc. batteries): 420 g (0.93 lb / 14.82 oz)
Summary
The D750 highest resolution of 6016 x 4016 pixels (24 megapixels) is better in comparison with the D5500 highest resolution of 6000 x 4000 pixels (24 megapixels). The D750 is equipped with larger sensor compared to the D5500: Full frame (35.9 x 24 mm) versus APS-C (23.5 x 15.6 mm). This is the most significant specification of this camera because big sensor lets the camera owner to capture pictures of the higher quality. The D750 offers a wider ISO range of 100-12800 in compare with 100-25600 ISO range of the D5500. Such ISO range let you to capture better pictures in low light situations. The D750 has more focus points in compare with the D5500: 51 vs 39. More number of focus points means less risk of losing focus lock during following a moving subject.
The D5500 is equipped with swiveling display that will let the camera owner to shoot pictures from any interesting angle. The D750 screen is better as it offers more screen dots 1,229,000 in comparison to 1,037,000 dots of the D5500 screen. The higher dot count screen is better for reviewing pictures on your camera. The D5500 is produced with a touch screen.
The D750 is environmentally sealed i.e. the camera has protection from rain, snow, dust and sand. The D750 battery life is better in compare to the D5500 battery life. According to CIPA standards the photographer will be able to make 1230 photos with the D750 and only 820 with the D5500. The D5500 weighs 420g that is 330g lighter in comparison with the weight of the Nikon D750. The Nikon D750 can utilize optional accessory GPS devices. This feature can be convenient if the camera owner is a traveller, to be able to go into the image metadata and see exactly where a picture was produced.
The Nikon D750 has 9 advantages and the D5500 only 3 so the D750 is the best choice. Check the list of the best offers on Amazon