Sony A7R IV vs Sony A900

Below is a in-depth analysis of the Sony A7R IV versus Sony A900, one being a Pro Mirrorless and the other is a Advanced DSLR and both of them are offered by Sony. There is a crucial difference among the image resolutions of the A7R IV (61MP) and A900 (25MP) but both cameras posses the same sensor sizes (Full frame).

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The A7R IV was unveiled 10 years later than the A900 and that is a fairly serious gap as far as camera tech is concerned. Each of the cameras have different body design with the Sony A7R IV being a SLR-style mirrorless camera and the Sony A900 being a Mid-size SLR camera.

Before delving right into a in-depth comparison, here is a concise overview of how the A7R IV grades against the A900 in regards to portability, imaging, features and an overall grade.

Below is a sample of the gallery pics for Sony Alpha A7R IV and Sony Alpha DSLR-A900. The full galleries are viewable at Sony A7R IV Gallery and Sony A900 Gallery.

When you are looking to lug around your camera often, you are going to need to factor its weight and volume. The Sony A7R IV has got external measurements of 129mm x 96mm x 78mm (5.1" x 3.8" x 3.1") having a weight of 665 grams (1.47 lbs) whilst the Sony A900 has sizing of 156mm x 117mm x 82mm (6.1" x 4.6" x 3.2") with a weight of 895 grams (1.97 lbs).

Look at the Sony A7R IV versus Sony A900 in the all new Camera and Lens Size Comparison Tool.

Don't forget, the weight of an Interchangeable Lens Camera will differ based on the lens you have attached during that time. The following is a front view proportions comparison of the A7R IV and the A900.

Factoring in size and weight, the portability grade of the A7R IV and A900 is 62 and 54 respectively.

In many cases, its tough to visualise the gap in sensor measurements purely by going through specifications. The visual below will provide you a greater sense of the sensor measurements in the A7R IV and A900.

To sum up, both cameras provide the same sensor dimensions but not the same MP. You should expect to see the Sony A7R IV to show more detail having an extra 36MP. Greater resolution will also make it easier to crop photos more aggressively. The more recent A7R IV is going to have an edge when it comes to sensor technology.