Samyang 50mm T1.5 AS UMC VDSLR Pentax

Pentax Mount Lens/Full Frame Format
Aperture Range: T1.5 - T22
One Aspherical, One Hybrid Asph. Element
Manual Focus and Aperture
Geared Focus and Aperture Control Rings
De-Clicked Aperture Control Ring
UMC Lens Multi-Coating
Minimum Focus Distance of 1.5'
Lateral Aperture and Distance Markings

The 50mm T1.5 VDSLR AS UMC Lens for Pentax Mount from Samyang is a fast, manual focus, prime lens. It provides a maximum aperture of T1.5 for effective low light capture and shallow depth of field control and an 8 blade iris for attractive bokeh. Optimized for cinema and video applications, the focus and aperture control rings are outfitted with industry standard gearing, which provides an interface for working with a traditional follow focus. The aperture control ring has also been de-clicked, which enables smooth iris pulls. In addition, bright aperture and distance markings are printed on the lens barrel facing laterally to facilitate easier control by a focus puller.

The 50mm has a minimum focus distance of 1.5'. Internal focusing minimizes the effects of lens breathing, which insures a more consistent angle-of-view when adjusting focus. The lens is composed of 9 elements in 6 groups, including one aspherical element and one hybrid aspherical element to reduce aberrations. In addition, a lens multi-coating helps to improve light transmission reducing flare and ghosting. The filter thread diameter is 77mm.

The VDSLR line of cinema lenses unifies Samyang's cine lenses into a cohesive series. Each of the VDSLR lenses will offer the same alignment of their geared focus and aperture rings so that follow focus and other rig accessories won't need re-adjustment when swapping lenses. Also, each lens is tested to be color matched with the other lenses in the series and provide the same color and contrast when shooting video. Lastly, the lenses are marked with focusing scales on each side of the barrel for easier adjustment from both sides of the camera.

Standard length manual focus prime lens for full frame mount cameras. Will also fit APS-C format cameras
Functional as still photo lens but optimized for cinema and video shooting with geared aperture and focus rings, de-clicked aperture for smooth exposure transitions, and side-facing aperture and distance markings. The 50mm T1.5 is part of the VDSLR series of cine lenses, sharing characteristics and features that unify the series and make it easier for users to swap out lenses when shooting video. Each VDSLR lens provides aligned focus and aperture rings so that readjustment of the follow focus is not necessary when switching lenses. Also each lens has been tested to match color and contrast for a consistent look and less potential post-processing. Finally, all lenses from this series print focus scales on both sides of the lens barrel for ease of use from each side of the camera.
Very fast T1.5 maximum aperture for effective low light capture and shallow depth of field.
Internal focusing system with 9 lens elements in 6 groups.
One aspherical and one hybrid aspherical lens element control aberrations and improve sharpness throughout the frame.
Lens multi-coating improves light transmission and reduces flare and ghosting.
Minimum focus distance of 1.5'
Filter thread diameter of 77mm

Mount Pentax Mount
Format Full Frame/35mm
Focal Length 50mm
Equivalent 35mm Focal Length N/A
Aperture Range T1.5 - T22
Angle of View 46.2°
Minimum Focus Distance 1.5' (45 cm)
Lens Construction 9 elements in 6 groups including 1 aspherical and 1 hybrid aspherical elements
Diaphragm Blades 8
Filter Diameter 77mm
Gear Pitch 0.8
Dimensions (O x L) 3.2 x 2.9" (81.6 x 74.7 mm)
Weight 20.3 oz (575 g)