Nikon D810A vs Nikon D90

This is a full comparison between the cameras Nikon D810A and Nikon D90. We compare them by looking at the categories you see below.

Nikon D810A

Nikon D90

Manufacturing

These cameras are both manufactured by Nikon.

Nikon D810A were released 2015 and Nikon D90 was released 2008. That is a 7 years difference. In tech, this period can be of interest since technology is always improving, etc.

Camera	Released
Nikon D810A	2015
Nikon D90	2008

Type of camera

Both these cameras are DSLR cameras. No difference there.

Sensors / crop factor

These cameras have different sensors. Nikon D810A has a "Nikon FX"-sensor while Nikon D90 has a "Nikon DX"-sensor, and their difference in sensors will also affect the crop factor and experience focal length. See the table below.

Camera	Focal length, 50mm f/1.8 **
Nikon D810A	50 mm Full-frame sensor No crop factor/focal length multiplier
Nikon D90	75 mm Nikon DX sensor Crop factor/focal length multiplier by * 1.5

** Experienced focal length when using a lens such as a common "50mm f/1.8"

Learn more about crop factor and focal length multiplier here:
Camera selection can affect the focal length (Nikon)

Resolution

Nikon D810A has a 36 MP (Megapixels) resolution while Nikon D90 has 12,3 MP. If we break down this in more detail this is the data behind the numbers:

Camera	Megapixels
Nikon D810A	36 MP 36152320 pixels 7360 x 4912
Nikon D90	12,3 MP 12212224 pixels 4288 x 2848

Nikon D810A has a 196 % larger resolution than Nikon D90. This could give you more details in the picture but also a possibility to crop more in the pictures, afterward while editing the pictures, if needed that is.

ISO range

Nikon D810A has a larger ISO-range than Nikon D90. Nikon D810A has an ISO range that stretches from 200 to 12800 while Nikon D90 has 200 to 6400.

Camera	ISO Range
Nikon D810A	200-12800
Nikon D90	200-6400

Autofocus and lens compatibility

Both of these cameras have a built-in autofocus motor. Some lenses, that support autofocus, do not have an autofocus motor of their own but this won't cause any problems with these two cameras.

Here is a complete overview of which lenses work with each camera:
Lens compatibility chart for Nikon D810A
Lens compatibility chart for Nikon D90

Pictures per second

Depending on what you are shooting the FPS, or frames/pictures per second, can definitely be of interest. Nikon D810A can shoot up to 5 pictures per seconds and Nikon D90 can shoot up to 4,5 pictures per seconds.

Camera	FPS (Frames per second)
Nikon D810A	5
Nikon D90	4,5

Ability to record movies

It is becoming more and more popular to record movies with digital cameras.

In this case, both Nikon D810A and Nikon D90 can shoot movies.

Weight

The weight of the camera can be an extremely important factor, especially if the camera is about to be used, or carried around, for several hours at a time.

Nikon D810A weighs 880 gr (equal to 1.94 lb) which is 25% heavier than Nikon D90 and its 703 gr (or 1.55 lb).

Camera	Weight
Nikon D810A	880 gr 1.94 lb
Nikon D90	703 gr 1.55 lb