Pentax SMC DA 50-135mm f/2.8 ED (IF) SDM Lens

The Pentax SMC DA 50-135mm f/2.8 ED (IF) SDM is a professional-grade telephoto zoom lens designed for APS-C-format Pentax DSLR cameras. With a focal length range of 50-135mm (equivalent to 75-202.5mm on full-frame), this lens is ideal for portrait, sports, and wildlife photography. The lens features a constant aperture of f/2.8, providing excellent low-light performance and the ability to create a shallow depth of field for beautiful subject isolation.

It incorporates Extra-low Dispersion (ED) elements to reduce chromatic aberrations and ensure sharp, high-contrast images. The Internal Focusing (IF) system keeps the lens length constant during focusing, and the Supersonic Direct-drive Motor (SDM) offers fast, smooth, and silent autofocus. With its rugged build quality and advanced optical design, this lens is perfect for demanding photographers seeking exceptional image quality and reliable performance.

key specifications:

• Focal Length: 50-135mm (equivalent to 76.5-202.5mm on full-frame)

• Maximum Aperture: f/2.8​

• Minimum Aperture: f/22​

• Lens Construction: 18 elements in 14 groups, including three Extra-low Dispersion (ED) elements​

• Angle of View: 31.5° to 11.9°

• Minimum Focus Distance: 1 meter (3.28 feet)​

• Maximum Magnification: 0.17x​

• Autofocus: Supersonic Direct-drive Motor (SDM) for fast and quiet focusing; also supports traditional screwdrive autofocus on compatible cameras

• Weather Resistance: Yes, with dust-resistant and drip-proof construction​

• Filter Size: 67mm​

• Dimensions: Approximately 76.5mm (diameter) x 136mm (length)​

• Weight: 685 grams (24.2 ounces)​

• Diaphragm Blades: 9 rounded blades​

• Included Accessories: PH-RBK67 lens hood and S90-160 soft case​

This lens combines a fast constant aperture with advanced optical design and weather-resistant construction, making it suitable for various shooting conditions