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Main
Model
Price
Advantages
PHOTOGRAPHY FEATURES Built-in flash: Yes
PHOTOGRAPHY FEATURES Continuous drive: 6.5 fps
SCREEN / VIEWFINDER Screen size: 3.2″
SCREEN / VIEWFINDER Viewfinder type: Optical (pentaprism)
OPTICS & FOCUS Number of focus points: 51
PHYSICAL Battery Life (CIPA): 1230
OTHER FEATURES GPS: Optional
Main
Model
Price
Advantages
SENSOR Effective pixels: 36 megapixels
SENSOR Max resolution: 7360 x 4912
SENSOR Sensor photo detectors: 37 megapixels
PHOTOGRAPHY FEATURES Maximum shutter speed: 1/8000 sec
SCREEN / VIEWFINDER Screen dots: 1,230,000
OPTICS & FOCUS Digital zoom: Yes (4)
PHYSICAL Weight (inc. batteries): 465 g (1.03 lb / 16.40 oz)
Summary
The Sony Alpha 7R maximum resolution of 7360 x 4912 pixels (36 megapixels) is better in comparison with the Nikon D750 highest resolution of 6016 x 4016 pixels (24 megapixels). The Alpha 7R offers better 4 digital zoom. The Nikon D750 offers more focus points than the Sony Alpha 7R: 51 vs 25. More focus points means less risk of losing focus lock during tracking a moving object.
The Sony Alpha 7R display is better as it has more screen dots 1,230,000 in compare to 1,229,000 dots of the Nikon D750 screen. The higher dot count display is better for reviewing images on your camera.
The Nikon D750 has built-in flash. The Nikon D750 battery life is better in compare to the Sony Alpha 7R battery life. In accordance with CIPA standards the photographer will be able to take 1230 photos with the D750 and only 340 with the Alpha 7R. The Alpha 7R weighs 465g which is 285g lighter in comparison with the weight of the D750. The D750 can utilize optional accessory GPS devices. This feature can be convenient for the travel photographer, to be able to go into the photo metadata and find out exactly where an image was produced.
The Nikon D750 and the Sony Alpha 7R have the same number of pros though as the Alpha 7R has better maximum resolution that is a very significant specification then this model will be the best buy.