[Expired]Sigma 18-50mm f/2.8 DC DN Contemporary Lens for Canon RF

回复 @icepauly1 : The focusing distance remains unchanged, with the focal length converted by a factor of 1.6. It is compatible with all RF mounts, but it's not recommended to use full-frame "Big Three" lenses (high-end zoom lenses) on a crop-sensor body—wouldn't that defeat the purpose of going for a lightweight and compact setup with an APS-C camera? For photographing young children, a zoom lens is recommended, even though there are limited options. The more you shoot, the more restrictive a prime lens becomes—unless your child is older, cooperative, or enjoys posed shots. 对焦距离不变，焦距折算*1.6，所有rf口适用，不推荐大马拉小车用全幅大三元，半幅图的不就是轻便快捷搞全幅大三元不是和出发点背道而驰？拍小娃推荐入手变焦，虽然选择过少，拍的越多定焦施展的范围越小，除非娃已经很大很听话或者喜欢摆拍。

回复 @螺丝熊 : Could you please answer another question: can the Canon R10 be used with Canon's Big Three (the “trinity” of Canon’s professional zoom lenses)? And if so, would you recommend it? I mostly shoot kids, and after using prime lenses, I’ve realized that wide apertures are indeed great for indoor photography. 麻烦再解答下，canon r10可以用canon 的大三元吗，如果可以建议用吗？主要拍小孩，用上定焦后发现大光圈室内确实好用。