TTArtisan 40mm F2.8 Macro Lens. 40mm F2.8 Macro Lens is compatible with. Maximum aperture: F2.8. Focal length: 40mm. Lens mount: E/X/EOS-M/M43. Perspective: 40°. 100% Official and official product. For all your inquiries about our products, we will reply you in detail within 2 week.