If you're a Micro Four Thirds mount user looking for a fast, prime lens, the Samyang 50mm F1.2 AS UMC CS / Rokinon 50mm F1.2 ED AS UMC lens may be worth considering. This lens offers a wide maximum aperture of f1.2, which allows for excellent low-light performance and shallow depth of field. However, it's important to note that this lens does not have autofocus or optical image stabilization.
The Samyang 50mm F1.2 AS UMC CS / Rokinon 50mm F1.2 ED AS UMC lens has a focal length range of 50mm, with a maximum aperture of f1.2 at all zoom levels. The lens is relatively lightweight, coming in at 375 grams, and has a filter diameter of 62mm. It's constructed with 9 elements in 7 groups and offers a minimum focus distance of 50 cm. The lens measures 68mm in diameter and 74mm in length.
As previously mentioned, the Samyang 50mm F1.2 AS UMC CS / Rokinon 50mm F1.2 ED AS UMC lens does not have autofocus. This means that you'll need to manually focus the lens in order to get sharp images. While this may be a downside for some users, others may prefer the level of control and precision that manual focus allows for.
Another feature that this lens lacks is optical image stabilization. This means that if you're shooting in low light or using slower shutter speeds, you may experience some camera shake and blurry images. However, if you have a tripod or can shoot with a faster shutter speed, this shouldn't be a major issue.
Overall, the Samyang 50mm F1.2 AS UMC CS / Rokinon 50mm F1.2 ED AS UMC lens is a great option for Micro Four Thirds mount users looking for a fast, prime lens. While it lacks autofocus and optical image stabilization, its wide maximum aperture, lightweight design, and reasonable price point make