Pentax S1 vs Sony A7R III

Lets look more closely at the Pentax S1 vs Sony A7R III, former being a Small Sensor Compact while the other is a Pro Mirrorless by brands Pentax and Sony. There exists a substantial gap between the resolutions of the S1 (14MP) and A7R III (42MP) and the S1 (1/2.3") and A7R III (Full frame) offer totally different sensor measurements.

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The S1 was revealed 7 years earlier than the A7R III and that is quite a big difference as far as technology is concerned. Both of the cameras feature different body design with the Pentax S1 being a Compact camera and the Sony A7R III being a SLR-style mirrorless camera.

Before diving right into a full comparison, here is a quick highlight of how the S1 scores against the A7R III with respect to portability, imaging, features and an overall rating.

Following is a sample of the gallery pictures for Pentax Optio S1 & Sony Alpha A7R III. The full galleries are available at Pentax S1 Gallery & Sony A7R III Gallery.

For anybody who is looking to carry your camera regularly, you are going to need to consider its weight and dimensions. The Pentax S1 enjoys outer measurements of 114mm x 58mm x 28mm (4.5" x 2.3" x 1.1") and a weight of 157 grams (0.35 lbs) while the Sony A7R III has dimensions of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") and a weight of 657 grams (1.45 lbs).

Check the Pentax S1 vs Sony A7R III in our brand new Camera plus Lens Size Comparison Tool.

Take into account, the weight of an ILC will differ depending on the lens you are utilizing during that time. Following is a front view scale comparison of the S1 versus the A7R III.

Taking into consideration dimensions and weight, the portability score of the S1 and A7R III is 93 and 63 respectively.

More often than not, it can be tough to see the difference between sensor sizing just by going over a spec sheet. The visual underneath will help provide you a far better sense of the sensor sizing in the S1 and A7R III.

As you can see, the two cameras feature different megapixels and different sensor sizing. The S1 with its tinier sensor will make achieving shallower depth of field more difficult and the Sony A7R III will offer you extra detail because of its extra 28 Megapixels. Greater resolution will make it easier to crop images way more aggressively. The older S1 is going to be behind when it comes to sensor technology.