TheSony FE 200-600mm F G OSS lens is an exceptional lens for wildlife and sports photographers seeking a powerful telephoto lens. This is a full-frame lens with a versatile focal range of 200-600mm on a full-frame body which is the equivalent field of view of 300-900mm on an APS-C camera like the Sony a6700. That’s quite the So f2.1 on an aps c lens/sensor provides about as much light as f2.8 on a full frame lens/sensor, or f3.5 on medium format. That doesn't sound right, correct me if I'm wrong. The focal length of a lens is defined by the lens construction and the distance to the focal plane so the sensor size isn't a factor, only the mount. The“crop factor” relates to the ratio of a sensor’s diagonal size compared to a full-frame sensor. For APS-C sensors, this factor usually ranges between 1.5x to 1.6x. This means that a lens on an APS-C camera multiplies its effective focal length by the crop factor. For instance, a 50mm lens on an APS-C camera offers a field of view Iown the full frame Sony A99 and I have occasionally used the Sony 18mm-250mm APS-C lens on it. So far, I haven't had any circular images! Of course, to avoid "circular images" the image produced by the A99 with the above APS-C lens is cropped automatically by the A99 so that its size is only 3936 pixels x 2624 pixels (rather than Samyangstates that this becomes the widest autofocusing lens on Sony APS-C, though that’s not entirely true. The Sony 10-18mm F4 OSS lens does exist, and it is an autofocusing lens, though with a much smaller maximum aperture that is a full two stops slower. The Samyang AF12 is the widest autofocusing prime lens on Sony APS-C at the ListOf Sony E-Mount APS-C Lenses. 35mm Equiv represents the perspective of the actual lens related to the traditional 35mm film standard. So when you hear someone refer to a 50mm lens, with APS-C that’s actually about 35mm because you have to include the 1.5X crop factor of APS-C. 35mm x 1.5 = 52.5mm. Official Sony APS-C Lenses APSC lens compatibility. While full-frame DSLRs can often be used with APS-C lenses, compatibility varies between brands. Full-frame Sony cameras like the Alpha 99 also have a crop mode for use with APS-C lenses, which the user can turn on or off as desired. The big advantage compared to the D700 is that the resulting image size Fullframe sensors measure approximately 43.5mm diagonally. So a baseline lens for full frame sensors, one with as “normal” of view as possible (not overly wide, not overly telephoto) is about 45mm-50mm. But for the smaller crop frame sensors, the diagonal is only about 30.5mm. So a quick way to think about it is if you have a crop .

aps c lens on full frame sony