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Price
Advantages
SENSOR Sensor size: Full frame (35.6 x 23.8 mm)
SENSOR Sensor photo detectors: 28 megapixels
IMAGE ISO: Auto, ISO 100-51200 (expands to 50-204800)
IMAGE Image stabilization: Sensor-shift
PHOTOGRAPHY FEATURES Maximum shutter speed: 1/8000 sec
PHOTOGRAPHY FEATURES Continuous drive: 20.0 fps
SCREEN / VIEWFINDER Screen dots: 1,440,000
OPTICS & FOCUS Number of focus points: 693
Main
Model
Price
Advantages
PHOTOGRAPHY FEATURES Subject / scene modes: Yes
PHOTOGRAPHY FEATURES Built-in flash: Yes (Pop-up)
SCREEN / VIEWFINDER Screen size: 3.2″
SCREEN / VIEWFINDER Viewfinder type: Optical (pentamirror)
PHYSICAL Weight (inc. batteries): 465 g (1.03 lb / 16.40 oz)
OTHER FEATURES GPS: Optional
Summary
The Alpha a9 is produced with bigger sensor than the D5600: Full frame (35.6 x 23.8 mm) versus APS-C (23.5 x 15.6 mm). This is the most important difference between these models as big sensor allows the camera owner to produce photos of the more professional quality. The Alpha a9 offers a wider ISO range of 100-51200 in compare with 100-25600 ISO range of the D5600. This ISO range let the photographer to produce good quality photos in more difficult conditions. The Alpha a9 has image stabilization which will allow the camera owner to produce sharp images when the camera is moving around a lot. The Alpha a9 provides more number of focus points in compare with the D5600: 693 vs 39. More number of focus points means less risk of losing focus lock during following a moving object.
The Alpha a9 display is better as it offers more number of screen dots 1,440,000 in compare to 1,037,000 dots of the D5600 screen. The higher dot count display is better for reviewing pictures on your camera. The Alpha a9 offers better maximum shutter speed - 1/8000 second.
The D5600 is equipped with built-in flash. The Nikon D5600 weighs 465g which is 208g lighter in comparison with the weight of the Alpha a9. The Nikon D5600 can utilize optional accessory GPS devices. Recording GPS data can be useful if the camera owner is a traveller, to be able to check the photo metadata and find out exactly where a picture was produced.
The Sony Alpha a9 has 8 advantages and the D5600 only 6 so the Alpha a9 is the best choice. Check the lowest price on Amazon