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 Ultimately if you’re considering a full-frame camera but are put off by the size and weight, there’s a strong argument that the better solution is to buy an APS-C or Micro Four Thirds system instead, which means all your lenses can be smaller. For Sony fans that could be the A6700, while more brand-agnostic photographers should also look Evenwith aps-c lenses, there could be an additional benefit. If you use other ratios than 3:2, let's say square for instance, you can take advantage of a larger area with a FF sensor than with aps-c. The Sony a7C II refreshes the compact full-frame with a 33MP sensor, the addition of a front control dial, a dedicated 'AI' processor, 10-bit Ithought the field of view would be the same whether that lens is on an APS-C A6600 body or the full frame A7C body set to crop mode. I understand that using a full frame lens on the A7C in crop mode will increase the focal length by a factor or 1.5x but not when using an APS-C lens. Maybe I am mistaken. ApplicableProducts and Categories of This Article. Yes, you can use an FE lens on an E-Mount camera that has an APS-C sensor. The image in the center of the lens is automatically cropped to the APS-C size, so there are no dark corners surrounding the picture to cause vignetting. However, when you use a non APS-C or non full-frame lens APSis discontinued, but the APS-C name is still frequently used for a cropped sensor. Almost every manufacturer designs cameras with slightly different sensor sizes. Canon has a 1.6x crop factor, which means its cropped sensors are 1.6 times smaller than the full-frame sensor (i.e., 22.5×15 mm). Welcometo my complete list of Sigma lenses for Sony E-mount. This guide covers both APS-C and FE (full-frame) lenses and includes the latest firmware versions. Table of Contents. Sigma Lenses Designed for Mirrorless +. Sigma Lenses Adapted from SLR Lenses +. Further E-Mount Lens Resources. Theeffect is that a 50mm full frame lens mounted on an APS-C body with a 1.5x crop factor will capture a field-of-view that is the same as a 75mm on a full frame FittingAPS-C lenses on full-frame cameras will create a vignette effect on images, where the edges and corners have a darkened effect. For example, a Nikon F-mount lens is CmHMF.