7Artisans has a new 28mm f/1.4 ASPH E+ lens optimized for Sony E-mount. The price of the lens is $449.10 (the "regular" M-mount lens version is $437.40). The E+ version is optimized for use with an adapter on a Sony E-mount camera (Google translation):
E + type is adjusted for the image sensor of the Sony 35mm full-size, it has been optimized
As with the lens usually of Leica M-only type E + type, but Masu Li, such is the lens of the Leica M mount, become the assumed design the use of wearing the mount adapter to full-size mirror-less machine of Sony E mount and which has been optimized for the CMOS image sensor of Sony 35mm full size.
Even though the same Leica M mount, why two models?
Leica M and has a separate property in the CMOS image sensor of Sony 35mm full size has been adjusted angle of incidence of the ray with respect to each image sensor. Therefore, "28mm F1.4 ASPH" of the Leica M-only type is the model of the Leica M mount, is the model of the Sony E-mount full-size "28mm F1.4 ASPH E +" if you use the lens original performance and it delivers.
How to choose If you want to use the full-size mirror-less camera other than Sony α series
When you use the Leica M mount models other than the mirror-less machine is recommended "E +". Compared with the normal of the Leica M-only type, the higher the resolution of the periphery.
| Focal length | 28mm (35mm sentence conversion) | focus | MF (manual focus) |
|---|---|---|---|
| Corresponding shooting screen size | 35mm full size | Lens Mount | Leica M |
| Minimum focusing distance | 0.7m | Aperture blades | 13 sheets |
| Iris | F1.4-F16 | Filter diameter | Φ52mm |
| Lens configuration | 9 group 11 sheets (ASPH aspherical one glass, two ED special low dispersion glass, three high refractive index and low dispersion glass) | Size / Weight | Φ60mm × 81.5mm / 490g to about |
