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Main
Model
Price
Advantages
SENSOR Effective pixels: 24 megapixels
SENSOR Max resolution: 6000 x 4000
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 Boosted ISO (minimum): 50
IMAGE Boosted ISO (maximum): 204800
IMAGE White balance presets: 10
PHOTOGRAPHY FEATURES Maximum shutter speed: 1/8000 sec
OPTICS & FOCUS Number of focus points: 693
PHYSICAL Weight (inc. batteries): 673 g (1.48 lb / 23.74 oz)
PHYSICAL Battery Life (CIPA): 650
Main
Model
Price
Advantages
PHOTOGRAPHY FEATURES Subject / scene modes: Yes
PHOTOGRAPHY FEATURES Built-in flash: Yes
PHOTOGRAPHY FEATURES Continuous drive: 24.0 fps
Summary
The Alpha a9 maximum resolution of 6000 x 4000 pixels (24 megapixels) is better than the Cyber-shot DSC-RX10 IV highest resolution of 5472 x 3648 pixels (20 megapixels). The Alpha a9 is equipped with bigger sensor compared to the Cyber-shot DSC-RX10 IV: Full frame (35.6 x 23.8 mm) versus 1″ (13.2 x 8.8 mm). It is the most significant specification of this camera because big sensor allows the camera owner to take photos of the higher quality. The Alpha a9 has a wider ISO range of 100-51200 in compare with 100-12800 ISO range of the Cyber-shot DSC-RX10 IV. Such ISO range allow you to take better photos in more difficult situations. The Alpha a9 has more presets of white balance - 10. This specification gives the camera owner more control over colour. The Alpha a9 provides more focus points in compare with the Cyber-shot DSC-RX10 IV: 693 vs 315. More number of focus points means less risk of losing focus lock during tracking a moving subject.
The Alpha a9 offers better maximum shutter speed - 1/8000 second.
The Cyber-shot DSC-RX10 IV is produced with built-in flash. The Alpha a9 battery life is better than the Cyber-shot DSC-RX10 IV battery life. In accordance with CIPA standards the camera owner will be able to make 650 photos with the Alpha a9 and only 400 with the Cyber-shot DSC-RX10 IV. The Alpha a9 weighs 673g that is 422g lighter than the weight of the Sony Cyber-shot DSC-RX10 IV.
Taking into account the above-mentioned differences the Alpha a9 will become the best choice. Check the lowest price on Amazon