Japanese website Photosku has published a specs and size comparison of new announced Tamron 28-75mm f/2.8 Di III RXD FE lens (B&H Photo) and Sony FE 24-70mm f/2.8 GM lens (B&H Photo). You can see the specs comparison below. You can also take a look interview of Tamron 28-75mm f/2.8 Di III RXD lens.
| product name | Tamron 28-75 mm F / 2.8 Di III RXD (Model A 036) | Sony FE 24 – 70 mm F 2.8 GM (SEL 2470 GM) |
|---|---|---|
| Release date | To be determined | April 28, 2016 |
| price | To be determined | About 230,000 yen |
| mount | Sony E | |
| series | Di series | G Master Series |
| type | zoom | |
| sensor | Full size | |
| Lens type | Mirror less | |
| Focal length | 28 – 75 mm | 24 to 70 mm |
| Focal length on APS-C machine (converted to 1.5 times) | 42 – 112.5 mm | 36 – 105 mm |
| auto focus | ○ | |
| AF motor | Stepping motor RXD (Rapid eXTRA-silent stepping Drive) | Direct drive SSM (DDSSM) |
| Manual focus | ○ (Direct manual focus DMF compatible) | ○ |
| Aperture | F 2.8 | F 2.8 to 22 |
| Number of diaphragm blades | Unpublished | 9 sheets |
| Lens configuration | Unpublished | 13 groups 18 sheets |
| Lens configuration | Unpublished | One very high aspherical XA (extreme aspherical) lens, two aspheric lenses, one ED (special low dispersion) glass, one super ED glass |
| coating | Unpublished | Nano AR coating |
| Fluorine coating | Unpublished | |
| Shortest shooting distance | Wide end: 0.19 m, Tele end: 0.39 m | 0.38 m |
| Maximum shooting magnification | Unpublished | 0.24 times |
| Angle of view | Unpublished | 84 – 34 ° |
| Filter size | Unpublished | 82 mm |
| Hooded | Unpublished | Floral bayonet type ALC-SH 141 |
| Image Stabilizer | – | |
| Teleconverter | Unpublished | – |
| Lens button | Unpublished | Focus hold button, focus mode switch (AF / MF selector switch), zoom lock switch |
| Dustproof and drip-proof structure | Simple drip-proof structure, antifouling coat | Consideration designed |
| Maximum diameter | Unpublished | 87.6 mm |
| length | 117.8 mm | 136 mm |
| weight | 550 g | 886 g |
via: Photosku