Samyang 24mm F1.4 ED AS UMC Pentax and Sony mount lens review: Best 24mm lens for those users?

By Kevin Carter - Friday April 25 2014

Lens Review
Introduction | Samyang 24mm f/1.4 ED AS UMC mounted on a Pentax K-3: Slightly low sharpness at wide apertures | Samyang 24mm f/1.4 ED AS UMC Pentax vs Pentax smc DA 12-24mm F4 ED AL (IF): Appealing option | Samyang 24mm f/1.4 ED AS UMC mounted on a Sony A99: Excellent performance overall | Samyang 24mm f/1.4 ED AS UMC Sony vs Sony Vario-Sonnar T* 24-70mm F2.8 ZA SSM: Competitive performance | Conclusion
Samyang 24mm F1.4 ED AS UMC Pentax and Sony mount lens review: Best 24mm lens for those users?

Following the recent reviews of the Canon mount and modified Nikon (AE) models we’ve now turned our attention to the Sony Alpha and Pentax K mount versions of the ultra-high speed Samyang 24mm f1.4 prime. Read on to find out how well the Samyang performs and if that or a rival model is the best choice for Sony and Pentax users.

Like other models from the firm, at $669 the Samyang 24mm f1.4 ED AS UMC is a modestly priced manual focus only model with an impressive optical design. The formula comprises of 13 elements in 12 groups, including four ED glass elements to reduce the effects of chromatic aberration and two aspherical elements to decrease spherical aberration and distortion. However, there are some concessions to the accessible pricing.

Like the Canon mount version previously reviewed, the Sony and Pentax mount models eschew any electronic or mechanical linkages, thus restricting the handling and operation of the lenses.  As a result both models lack an automatic diaphragm and adopt stopped down metering only, requiring the user to focus and close the diaphragm to the taking aperture before making the exposure. Curiously, Samyang offers those features without a premium on Nikon (AE) mount model but not on any other mount.

As a full frame model the 24mm focal length is a popular choice, and as a 35mm equivalent on Pentax DSLRs it remains a tempting option. However, with 77mm filter thread and measuring 3.27 x 3.74" (83 x 95 mm) and weighing 20.46 oz or (580g) this is a big and heavy lens. It’s available now in Pentax or Sony Alpha mounts at $669.

Samyang 24mm f/1.4 ED AS UMC mounted on a Pentax K-3: Slightly low sharpness at wide apertures

Samyang 24mm f/1.4 ED AS UMC Pentax vs Pentax smc DA 12-24mm F4 ED AL (IF): Appealing option

Samyang 24mm f/1.4 ED AS UMC mounted on a Sony A99: Excellent performance overall

Samyang 24mm f/1.4 ED AS UMC Sony vs Sony Vario-Sonnar T* 24-70mm F2.8 ZA SSM: Competitive performance

Conclusion