Laowa Lens 25 mm f / 2.8 Ultra Macro for Pentax K

Laowa 25 mm f / 2.8 lens is a compact ultra macro developed for extreme close-ups. Offer it up to five times larger for shooting miniature objects.
optical system Laowa 25 mm f / 2.8 Macro Ultra consists of eight elements arranged in six groups. Among the lenses is a glass element ultra-low dispersion, which is responsible for the reduction of chromatic aberration. The whole design provides images with high sharpness and faithful color cast. Adjustable aperture f / 2.8 - f / 16, and relatively short for this type of lens, the focal length to provide a comfortable working depth of field. Variable scale image magnification (2.5x - 5x) works well when shooting objects with different sizes, such as insects, plants, or details of larger items. The lens can not be used for applications other than Macro. The lens barrel is made entirely of metal.
available from a separate sales mount allows quick assembly of the lens on a tripod, and incorporating a standard Arca-Swiss (38 mm) ensures compatibility with a wide photographic heads.

Specifications
- model: 25 mm f / 2.8 Macro 2,5-5x Ultra
- optical structure 8 elements in 6 groups
- focal length: 25 mm
- The minimum aperture f / 2.8
- maximum aperture is f / 16
- the angle of view of 10.3 °
- coating the image: full frame
- the number of diaphragm blades: 8
- minimum focusing distance (die) 17.3 cm (2.5x) - 23.4 cm (5x)

Dedicated to extreme close-up imaging, this lens is a specialized macro lens for photographing subjects at magnifications greater than life-size. Specifically developed for macro photography, this lens is designed for use within a 2.5:1 to 5:1 magnification range for producing greater-than-life-size imagery. © Ireneusz Irass Waledzik © Alberto Ghizzi Panizza © Shekhei Goh   Carefully designed to extend the short working distance of traditional 25mm lens in order to provide sufficient room for lighting hitting the subject. Operating within a 2.5:1 to 5:1 range, this lens has a minimum focus distance of just 6.8″ at the 5:1 magnification along with a comfortable 1.6″ working distance. (40mm @ 5:1 , 45mm @ 2.5:1)     Complementing the close-up capabilities, the optical design incorporates 8 elements in 6 groups  with a extra-low dispersion element to deliver an unprecedented corner to corner sharpness. The extra-low dispersion element reduces color fringing and chromatic aberrations for a high degree of clarity. © Wentaidashu © Gua Ge   Wide-angle design with magnification range from 2.5 to 5X benefits the high magnification design by providing greater depth of field compared to telephoto or long lens designs. Moreover, manual focus operation for precise control over focusing distance when working with close-up subjects. © YiYeGuZhou © YiYeGuZhou   Laowa 25mm f/2.8 2.5-5X Ultra Macro has one of the smallest & lightest barrel of lenses in its class. This allows more light to gather on subject and convenient to use in fields. The below image show the size difference between our 25mm f/2.8 2.5-5X and the MP-E 65mm f/2.8 1-5X in the market. © Richard Wong © Richard Wong © Je Ge © Gil Wizen © Wentaidashu © YiYeGuZhou Name 25mm f/2.8 2.5-5x Ultra Macro Focal Length 25mm Max. Aperture f/2.8 Angle of View 10.3° Format Compatibility Full Frame Lens Structure 8 elements in 6 groups Aperture Blades 8 Min. Focusing Distance 17.3 (5x) – 23.4 (2.5x)cm Max. Magnification 5x Focus Mode Manual Focus Filter Thread N/A Dimensions 82 x 65 mm Weight 400g Mounts (Standard Version) Canon EF & RF / Nikon F & Z / Sony E / Pentax K MTF Optical Structure