Of all third-party lens manufacturers, Korean Samyang was the first to launch a new lens lineup for the recently announced Sony A7 and A7R full-frame cameras. There are five of them – as many as Sony announced themselves, but unlike the Zeiss lenses these were not specifically designed for mirrorless cameras. Rather, they are tweaked Samyang prime lenses designed for the most popular DSLR systems and are also known as Bower, Rokinon, Vivitar and Pro-Optic.
The plus is these lenses will be available very soon. On the downside, they are no different in size or weight to their DSLR counterparts, and possibly even bigger because, essentially, they have lens mount adapters attached permanently.