Super tele-photo focal length of 300mm (converting to 450mmm on a 35mm format)
Max aperture of f/4
8 lens elements arranged in 6 groups including ED (Extra-low dispersion) element, Pentax Super Protect (SP) coating,
9 diaphragm blades
Filter thread specification of 77mm
SMC 300mm f/4 ED(IF) SDM DA* series prime lens has a 35mm focal length equivalent of 450mm giving the photographer a super-telephoto reach, plus a constant fast focal length of f/4. It sports Pentaxs Quick Shift Focus system for smooth switch from Auto to Manual focusing and SDM focusing system for quiet focusing operation. 8 elements arranged in 6 groups make up the lens construction including ED (Extra-Low Dispersion) elements.
Sporting the ultra-quiet SDM autofocus and extreme weather-resistance, the DA Star 300mm, designed exclusively for PENTAX digital SLRs, is the perfect long lens for in-the-wild telephoto photography.
The smc PENTAX DA Star 300mm F4 ED (IF) SDM is a high-performance telephoto lens.
The PENTAX-original Quick-Shift Focus System allows instant switching from autofocus to manual focus operation.
The SDM focus system incorporated in this lens results in a smoother, quieter autofocusing operation using a built-in supersonic motor.
The focal length is equivalent to 450mm in the 35mm format.
The tightly sealed, weather-resistant and dust-resistant construction enhances durability for use in both rainy and dusty conditions, making the DA Star 300mm F4 ED (IF) SDM lens a perfect companion for the weather-resistant PENTAX DSLR bodies.
The PENTAX-original SP (Super Protect) coating repels dust, water and grease to keep your lens clean and your image quality at its peak.
The Extra-low Dispersion (ED) elements compensate for chromatic aberration.
Developed specifically for PENTAX digital SLR cameras.
