Main
Model
Price
Advantages
launch
Announced
Body type
Camera subcategory
Sensor
Effective pixels
Max resolution
Sensor size
Sensor type
Processor
Image ratio w:h
Other resolutions
Sensor photo detectors
Image
ISO
Boosted ISO (minimum)
Boosted ISO (maximum)
White balance presets
Custom white balance
Image stabilization
Uncompressed format
JPEG quality levels
Photography features
Minimum shutter speed
Maximum shutter speed
Aperture priority
Shutter priority
Manual exposure mode
Subject / scene modes
Built-in flash
Flash range
External flash
Flash modes
Continuous drive
Self-timer
Metering modes
Exposure compensation
AE Bracketing
WB Bracketing
Screen / viewfinder
Articulated LCD
Screen size
Screen dots
Touch screen
Screen type
Live view
Viewfinder type
Viewfinder coverage
Viewfinder magnification
Videography features
Resolutions
File Format
Videography notes
Microphone
Speaker
Optics & Focus
Autofocus
Manual focus
Number of focus points
Lens mount
Focal length multiplier
Digital zoom
Physical
Weight (inc. batteries)
Dimensions
Environmentally sealed
Battery
Battery details
Battery Life (CIPA)
Storage
Storage types
Connectivity
USB
HDMI
Wireless
Wireless notes
Remote control
Other features
GPS
GPS notes
Orientation sensor
Timelapse recording
Samples
Videos
Summary
The D810 highest resolution of 7360 x 4912 pixels (36 megapixels) is better than the D610 highest resolution of 6016 x 4016 pixels (24 megapixels). The D810 provides more focus points than the D610: 51 vs 39. More number of focus points means more convenience while attempting to focus on objects which are not centred.
The D810 display is better as it has more screen dots 1,229,000 in compare to 921,000 dots of the D610 display. The higher dot count display is better for reviewing pictures on your camera. The Nikon D810 provides better highest shutter speed - 1/8000 second.
The D810 battery life is better than the D610 battery life. In accordance with CIPA standards the photographer will be able to capture 1200 photos with the D810 and only 900 with the D610. The Nikon D610 weighs 850g that is 130g lighter than the weight of the Nikon D810.
Considering the above-mentioned differences the D810 is the best choice. Check the lowest price on Amazon.