The Pentax DA645 25mm f/4 Lens is a professional-grade wide-angle lens designed for the Pentax 645 medium format digital camera system. It offers a versatile focal length of 25mm, which is equivalent to approximately 19.5mm in the 35mm format, making it ideal for landscape, architecture, and interior photography.
**Specifications and Features**
The lens features a high-quality optical design that consists of 11 elements in 8 groups, including two aspherical elements and one ED (Extra-low Dispersion) element. This construction helps to minimize distortion, chromatic aberrations, and other optical imperfections, resulting in images with exceptional sharpness, clarity, and color accuracy.
With a maximum aperture of f/4, the lens allows for excellent low-light performance and enables photographers to achieve a shallow depth of field when desired. The aperture can be stopped down to f/32, providing a wide range of creative possibilities.
The lens incorporates Pentax’s exclusive HD (High Definition) coating, which helps to reduce lens flare and ghosting, ensuring excellent contrast and image quality even when shooting against strong backlighting. Additionally, the lens is optimized for digital photography, utilizing advanced technologies such as digital lens optimization and lens coatings designed to minimize reflections and maximize light transmission.
The Pentax DA645 25mm f/4 Lens is built to withstand the rigors of professional use. It features weather-sealing to protect it from dust, moisture, and extreme temperatures, allowing photographers to confidently shoot in various challenging conditions. The lens also has a built-in sliding lens hood to further reduce the risk of flare and protect the front element.
**Release Date and Price**
The Pentax DA645 25mm f/4 Lens was released on September 25, 2011, and it was available for a retail price of $3,499.95 USD. It remains a popular choice among professional photographers who work with the Pentax 645 medium format system and are in need of a high-quality wide-angle lens.
**Conclusion**
The Pentax DA645 25mm f/4 Lens is a top-tier wide-angle lens designed for the Pentax 645 medium format digital camera system. With its outstanding optical performance, weather-sealed construction, and advanced features, it offers photographers the ability to capture stunning images with exceptional clarity, detail, and color accuracy. Whether you are a landscape photographer, an architectural photographer, or simply someone who appreciates high-quality optics, this lens is a worthy investment for your professional or enthusiast photography needs.
