Pentax Digital Spotmeter

Pentax Digital Spotmeter
The Ultimate 1° Precision Reflected Light Spot Meter – Legendary Zone System Exposure Tool
The Pentax Digital Spotmeter is a legendary, highly coveted precision instruments designed for critical exposure measurement. Renowned by large-format film landscape photographers, cinematographers, and strict adherents of Ansel Adams’ Zone System, this lightweight yet incredibly durable device provides an ultra-narrow 1° measuring angle. This allows you to evaluate the precise reflectivity of a distant subject highlight or deep shadow with surgical accuracy, completely eliminating the need to physically walk up to your subject.

Built to premium optical standards, the Pentax Digital Spotmeter features a silvered pentaprism housing that produces a laterally correct, bright image within the viewfinder. The 1° spot boundary is clearly centered over a bright Fresnel lens system. Equipped with a vivid, red LED digital readout nested directly inside the viewfinder, this masterclass exposure tool delivers instantaneous, absolute EV values under any lighting conditions from bright sunlit snow down to dark twilight shadows.

This precision light meter is in full operational condition. The package comes well-equipped for field use and includes the wrist strap, protective soft case, and front objective lens cap.

Key Features & Optical Excellence
Micro-Precise 1° Reflected Spot Sampling: Evaluates exactly 1 degree of a scene’s center, ensuring that background highlights or peripheral shadows do not skew your critical exposure calculations.

Premium Coated Optic Architecture: Both the objective lens and adjustable eyepiece are Super Multi-Coated (SMC) to combat reflections, ghosting, and contrast loss. The internal pentaprism is specially silvered to guarantee a bright, vibrant viewfinder feed.

Realistic Viewfinder Perspective: Features a comfortable diagonal 26° field of view—perfectly mimicking the natural, focused perspective seen through a 35mm camera fitted with a 90mm portrait telephoto lens.

Integrated Viewfinder LED Display: Projecting large, luminous red digital figures directly inside your visual plane, this display allows for effortless readout capture in pitch-black night conditions or blazing desert sun.

Adjustable Diopter Control: The rugged rubber eyepiece assembly can be mechanically tuned from -2 to +1 diopters to ensure a crisp, sharp viewfinder frame matching your personal eyesight.

40.5mm Front Filter Interface: Outfitted with a standard threaded front ring allowing black-and-white film photographers to mount color contrast filters (such as red, orange, or yellow filters) directly over the objective lens to precisely gauge color reflectivity adjustments.

Heavy-Duty Shock-Resistant Shell: Engineered inside a robust, impact-resistant chassis contoured for secure handheld ergonomics during grueling back-country landscape expeditions.

Dial Scaling & Measurement Matrix
The barrel structure is wrapped in high-contrast, fully adjustable mechanical conversion scales designed to instantly map your recorded EV values into actionable camera adjustments:

ISO/ASA Sensitivity Spectrum: 6 to 6,400 ASA

Shutter Speed Control Scale: 1/4000 Second up to 4 Minutes (Adjustable in fine 1/3-stop increments)

Aperture Aperture Scale: f/1 to f/128 (Adjustable in fine 1/3-stop increments)

Exposure Value (EV) Index: EV 1 to 20 (Adjustable in fine 1/3-stop increments)

Kit Inventory & Condition Diagnostics
Functional State: FULLY OPERATIONAL. The internal silicone photo diode reads light values with absolute accuracy, the interior red LED digits glow brightly with no missing segments, and the calculators smoothly align.

Included Accessories:

Original Security Wrist Strap

Protective Padded Soft Storage Case

Front Objective Lens Cap

Technical Specifications
Meter Classification: Precision 1° Viewfinder Spot Reflected Light Meter

Light Sensor Matrix: High-Sensitivity Silicon Photo Diode (SPD)

Measuring Angle Profile: Strict 1 Degree

Effective Range Capability: 5.0 feet (1.5 m) out to Infinity (Down to 3.3 feet / 1.0 m achievable with minimal close-focus compensation)

Exposure Sensitivity Spectrum (ISO 100): EV 1 to EV 20

Power Supply Requirement: 1 x 6V PX28 Series Battery (Compatible with 544 Silver Oxide, 537 Alkaline, 4LR44, or 4SR44 variants)

Weight: Approx. 6.5 oz / 185 g (Extremely lightweight travel form factor)