Bryan Carnathan’s recent review of the Sony 20mm f/1.8 G lens for The Digital Picture does a deep dive into its image quality and shows the proof through a variety of sample photos. "Of all of a lens's characteristics, most of us care most about what we refer to as sharpness, a combination of contrast and resolution. In that regard, this lens rocks." 

“The AF performance is good. Quality is there. The price is reasonable and sealing the deal is that the Sony FE 20mm f/1.8 G Lens delivers impressive image quality." – Bryan Carnathan, The Digital Picture

He does a number of tests on the lens to fully analyze the image quality at different apertures and in a wide variety of situations. 

"With a 9-blade count aperture, point light sources captured with a narrow aperture setting and showing a sunstar effect will have 18 points. Wide aperture lenses tend to have an advantage in this regard and this lens is capable of producing gorgeous stars..."

He also closely examines the focus of the lens to see if Sony’s claim that the “Two XD (eXtreme Dynamic) Linear Motors easily keep up with the high-speed capabilities of today's most advanced camera bodies, taking advantage of their full autofocus speed, precision, and tracking potential to capture the most dynamic subjects,“ holds up. 

"The Sony 20mm f/1.8 G Lens internally focuses smoothly, quietly, accurately, and the speed is quite good. This lens mounted to an α7R IV focuses in very low light scenarios (though focus slows) when adequate contrast is provided."

Carnathan concludes, "The 20mm focal length is fun and useful. The small size and light weight are very convenient and comfortable. The AF performance is good. Quality is there. The price is reasonable and sealing the deal is that the Sony FE 20mm f/1.8 G Lens delivers impressive image quality."

Read the full review and see the sample photos at The-Digital-Picture.com.