Sony’s New OLED Microdisplay Could Attract DSLR shooters to Mirrorless Cameras

Sony has revealed an OLED electronic viewfinder (EVF) called the ECX339A and it has a resolution of 1600 x 1200, the highest in class for a 0.5-type.

Sony claims that the ECX339A achieves “the world’s smallest pixel pitch of 6.3?m by leveraging Sony’s OLED display technology and miniaturization technology” which in turn allows it to have a 1.6x higher resolution than previous EVFs. Additionally, the OLED display utilizes a entirely new drive circuit design that uses half the voltage of previous models and it features frame rates up to 240 fps, which is double the amount of past models.

Compared to other EVFs

To compare, the QVGA ECX337A, used in the a9, has a resolution of 1280 and maxes out at 120 fps. Also the ECX339A has 5.6 million dots, which is much higher than the ECX337A’s 3.7 million dots.

The Sony F5 and F55 also have 1280 x 720 resolution screen with a 10,000:1 contrast ratio; the ECX339A’s contrast ratio is supposedly greater than 100,000:1.

Sharper Mirrorless Cameras

With this higher resolution and refresh rate, you can most likely expect sharper and more responsive displays, which the Verge predicts will further close “the gap on DSLRs with optical viewfinders.”


Display Size: 0.5 type (12.6 mm Diagonal length)
Resolution: UXGA?1600×RGB×1200?
Pixel pitch: 6.3?m
Max. frame rate:120 fps (progressive) / 240 fps (dual-line progressive)
Power consumption (200cd/m2): 310 mW @ 60 fps (progressive) / 120 fps (dual-line progressive)
Video interface:LVDS/Sub-LVDS
Max. luminance: 1,000cd/m2
Contrast: 100,000:1 or higher
Color gamut (u’v’):sRGB ratio: 110%


It’s highly likely that we’ll be seeing the ECX339A in the near future, possibly in Sony’s a7S III camera. It’s rumored that the a7s III will be first shown at Photokina in Cologne, Germany this September.

Sean Berry
Sean Berry
Sean Berry is Videomaker's Managing Editor.

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