Pentax HD PENTAX-D FA645 35mm f/3.5 AL [IF] Lens

Pentax 35mm f/3.5 645 Wideangle

The Pentax HD PENTAX-D FA645 35mm f/3.5 AL [IF] Lens is a high-performance wide-angle prime for the 645 system, offering a 27.5mm equivalent field of view. Featuring advanced HD lens coatings and aspherical elements, it delivers exceptional sharpness and contrast while minimizing distortions common in wide-angle optics. This lens is specifically optimized for high-resolution digital sensors, making it an essential tool for landscape and architectural photographers seeking the ultimate in medium format clarity.

Equipped with an internal focusing (IF) system, this lens provides fast and quiet autofocus without changing its physical length, ensuring balanced handling. The rounded diaphragm blades create a natural bokeh effect, while the All-Weather design provides protection against dust and moisture for outdoor use. Its compact and lightweight magnesium alloy chassis makes it a portable yet powerful wide-angle solution for professional photographers working in the field with Pentax 645Z and 645D bodies.

Pentax 35mm D FA 645 Specifications

• Focal length: 35 mm prime coverage.
• Maximum aperture: f/3.5 across the entire frame.
• Minimum focusing distance: 0.98 ft (0.3 m).
• 10 Elements in 7 Groups with Aspherical construction.
• All-Weather (AW) sealing for outdoor shooting environments.
• Best Application: Landscape and Architecture.
• Mount type: Pentax 645AF2 compatible with 645D and 645Z bodies.
• Warranty: 1-Year Official Pentax USA Warranty.

Pentax 645 35mm Wide-Angle

This lens has been utilized in demanding architectural field measurements and incorporates hand-tested optical components for peak performance. It holds a strong reputation for industry-leading reliability among medium format wide-angle specialists working on commercial assignments.

Aspherical and HD Construction

The technical design using aspherical elements reduces geometric distortion and aberrations while maintaining extreme resolution. Landscape artists benefit from this construction by achieving ultra-sharp details from the center to the extreme edges of the frame.

Constant f/3.5 Aperture Implementation

The f/3.5 aperture enables stable exposure control while providing a versatile depth of field for expansive landscape scenes. Professional architectural photographers rely on this feature to maintain consistent lighting levels when documenting interior spaces with natural light.

Internal Focus AF System

The IF system provides smooth and silent autofocusing which improves the workflow for field photographers in fast-changing light. Nature photographers benefit especially when working in tight locations where capturing sharp wide-angle details is critical for professional quality.

Magnesium Alloy Chassis

The lens weighs 1.25 lb (570 g) with a barrel length of 3.54 in (90 mm) and a weather-sealed body. Professional users value this lightweight and durable weatherproofing when documenting assignments in rain, snow, or dusty environments without risking internal damage.

645AF2 Mount Compatibility

The Pentax 645 mount attaches to digital 645Z cameras with full support for electronic aperture and autofocus communication. Advanced photographers often find this seamless system integration vital for maintaining fast operational speeds during high-pressure commercial shoots or outdoor expeditions.

Professional Architecture Photography Deployment

The wide field supports expansive architectural tasks for professional photographers seeking to capture grand interior vistas. This lens reduces perspective distortion pain points in commercial work settings while providing the massive resolution required for gallery-quality prints.

D FA 645 35mm Maintenance Protocol

Proper cleaning with specialized lens tissues prevents smudging on the HD coating for optimal light transmission. Keeping the lens in a protective case maintains internal mechanical integrity over long periods of heavy field use under the 1-year official Pentax warranty.