A:Answer While these camera bodies offer the same 36.3 megapixels, optical low-pass filter and EXPEED 4 imaging processing, the celebrated Nikon D810A DSLR camera is designed exclusively for astrophotography and is not suitable for general photography. The Nikon D810A has an IR filter that is optimized for H-alpha red tones, resulting in four times greater sensitivity to the 656 nm wavelength than a a standard DSLR like the Nikon D810 camera. This allows celestial objects to be captured in stunningly sharp detail. The D810A has built-in time-lapse, interval timer and unlimited continuous shooting to help the user get astounding light trails of the night time sky. The versatile and remarkable Nikon D810 DSLR camera offers impressive speed and accuracy thanks to an Advanced Multi-CAM 3500FX AF sensor that uses 51 focus points, including 15 cross-type sensors, 11 of which work all the way to f/8, plus a new Group Area AF. This amazing camera is prepared to help you capture landscape, studio, wedding and portrait images that are vivid and tack-sharp. Either of these high-performance camera bodies would be a powerful addition to any photographer's bag.
