The APOQUALIA 2/28 f2/28mm Lens has recently become more powerful due to Retro Focus and aspherical surfaces. However, Footwork is bad due to the larger size of the Lens. "I stuck to the small Gauss type and continued my research, and I was able to get the performance I liked with taste and softness. With a diameter of 50 mm and a thickness of 9.8 mm, the WT was able to finish an ultra-compact design of 50 g. Astigmatism = AST fully corrected (although field curvature remains 0.3 mm) to obtain a beautiful circular image and beautiful bokeh at the focus position. Chromatic aberration is as good as APO, and distortion is very good at 1/5 to 1/8 of the Retro Focus Lens. The inevitable drawback of the Gaussian type S.Coma cannot be avoided and Coma flare increases in the middle to corner of f2-2.5. But up to 20 diameters, Sharpness Contrast emphasizes the central subject well. The focus misalignment at the center -70° position is 0.2mm, but it is kept to a reasonable value, but you may notice that if you take a plane at open to 2.8. It is important to use this lens skillfully by combining its features and shortcomings.

If you narrow it down to F4 or higher, it is an almighty that will be sufficient. The f2-2.5 is the aperture that tastes good of this lens. Take advantage of high contrast up to 20 diameters and beautiful flares in the periphery.

○ Format: Gauss type 2/28mm lens 4 groups 6 elements Full MC

Size: Diameter 50× Thickness 9.8mm Weight: 50g (Set 60g)

Mount: Leica M Mount Color: Gold

〇 Focus: ∞ to 0.9m Interlocking 0.9m to 0.75m mirrorless SLR