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Price
Advantages
SCREEN / VIEWFINDER Screen size: 3.2″
SCREEN / VIEWFINDER Screen dots: 2,359,000
SCREEN / VIEWFINDER Viewfinder type: Optical (pentaprism)
PHYSICAL Battery Life (CIPA): 1240
OTHER FEATURES GPS: Optional
Main
Model
Price
Advantages
SENSOR Effective pixels: 42 megapixels
SENSOR Max resolution: 7952 x 5304
SENSOR Sensor size: Full frame (35.9 x 24 mm)
SENSOR Sensor photo detectors: 44 megapixels
IMAGE Image stabilization: Sensor-shift
PHOTOGRAPHY FEATURES Subject / scene modes: Yes
OPTICS & FOCUS Digital zoom: Yes
OPTICS & FOCUS Number of focus points: 425
PHYSICAL Weight (inc. batteries): 657 g (1.45 lb / 23.17 oz)
Summary
The Alpha a7R III highest resolution of 7952 x 5304 pixels (42 megapixels) is better in comparison with the Nikon D500 maximum resolution of 5568 x 3712 pixels (21 megapixels). The Alpha a7R III is equipped with larger sensor compared to the Nikon D500: Full frame (35.9 x 24 mm) versus APS-C (23.5 x 15.7 mm). This is very important difference between these models because big sensor lets the photographer to capture pictures of the better quality. The Alpha a7R III provides image stabilization that will help the photographer to capture blur-free pictures when using lenses with long focal lengths. The Alpha a7R III offers more focus points in compare with the Nikon D500: 425 vs 153. More number of focus points means more convenience while attempting to focus on objects which are not centred.
The Nikon D500 screen is better as it has more screen dots 2,359,000 in comparison to 1,440,000 dots of the Alpha a7R III screen. The higher dot count screen is better for reviewing images on your camera.
The Nikon D500 battery life is better in compare to the Alpha a7R III battery life. According to CIPA standards the photographer will be able to produce 1240 photos with the D500 and only 650 with the Alpha a7R III. The Sony Alpha a7R III weighs 657g that is 203g lighter in comparison with the weight of the D500. The D500 can utilize optional accessory GPS devices. Recording GPS data can be convenient if you like to travel, to be able to go into the image metadata and see exactly where a photo was shot.
The Sony Alpha a7R III has 9 advantages and the Nikon D500 only 5 so the Alpha a7R III becomes the best choice. Check the lowest price on Amazon