Pentax S1 vs Sony A7 III

Following is a comprehensive assessment of the Pentax S1 versus Sony A7 III, former is a Small Sensor Compact while the other is a Pro Mirrorless by competitors Pentax and Sony. There is a considerable difference among the resolutions of the S1 (14MP) and A7 III (24MP) and the S1 (1/2.3") and A7 III (Full frame) come with different sensor sizes.

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The S1 was brought out 8 years before the A7 III which is a fairly large difference as far as camera tech is concerned. The two cameras offer different body type with the Pentax S1 being a Compact camera and the Sony A7 III being a SLR-style mirrorless camera.

Before getting through a complete comparison, below is a short highlight of how the S1 scores vs the A7 III in terms of portability, imaging, features and an overall score.

This is a sample of the gallery pictures for Pentax Optio S1 & Sony Alpha A7 III. The entire galleries are viewable at Pentax S1 Gallery & Sony A7 III Gallery.

For those who are going to carry around your camera often, you should factor in its weight and proportions. The Pentax S1 has physical measurements of 114mm x 58mm x 28mm (4.5" x 2.3" x 1.1") with a weight of 157 grams (0.35 lbs) whilst the Sony A7 III has measurements of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") having a weight of 650 grams (1.43 lbs).

See the Pentax S1 versus Sony A7 III in our completely new Camera & Lens Size Comparison Tool.

Take into consideration, the weight of an ILC will differ based on the lens you are using during that time. Underneath is the front view scale comparison of the S1 and the A7 III.

Looking at size and weight, the portability grade of the S1 and A7 III is 93 and 63 respectively.

Generally, it is tough to picture the contrast in sensor sizes merely by looking through specs. The picture underneath will help provide you a far better sense of the sensor sizing in the S1 and A7 III.

All in all, both of those cameras enjoy different megapixel count and different sensor sizes. The S1 because of its smaller sensor is going to make shooting shallow DOF harder and the Sony A7 III will result in more detail having its extra 10 Megapixels. Greater resolution can also help you crop pics far more aggressively. The more aged S1 will be disadvantaged in sensor innovation.