MATBOCK Tarsier Eclipse NVG Focus – Adjustable Iris

MATBOCK Tarsier Eclipse NVG Focus Enhancer – Adjustable Iris

The MATBOCK Tarsier Eclipse is a premium NVG focus enhancement device designed to improve near-field visibility through compatible night vision goggles without constantly adjusting the objective lens focus. Featuring a continuously adjustable optical iris and a replaceable protective lens, the Tarsier Eclipse provides a compact solution for managing depth of field and protecting valuable night vision optics.

By adjusting the iris opening, users can increase the effective depth of field of their night vision device, making nearby objects easier to see while retaining visibility of more distant objects. MATBOCK advertises visibility from approximately 3 inches to infinity, depending on the iris setting and available light.

The Tarsier Eclipse also incorporates a replaceable sacrificial lens that helps protect the NVG objective against dust, dirt and scratches. Its compact construction, simple rotating adjustment ring and model-specific mounting options make it suitable for a wide range of compatible monocular and binocular night vision systems.

Key Features

• Adjustable NVG focus enhancement device
• Continuously variable optical iris
• Increases effective depth of field for near and distant viewing
• Manufacturer-advertised visibility from approximately 3 inches to infinity
• Rapid iris adjustment using a rotating ring
• Replaceable clear sacrificial protective lens
• Tool-free sacrificial lens replacement
• Helps protect NVG objectives from dust, dirt and scratches
• Compatible with selected PVS-14, PVS-31 and other NVG systems
• Available in two mounting variants
• Hardened rubber construction
• Aluminum optical iris
• Approximately 31g per unit
• Retention lanyard with swivel hook included
• Sold individually for one night vision optical channel

Adjustable Iris for Night Vision Focus

The MATBOCK Tarsier Eclipse adjustable iris allows the effective aperture of a compatible night vision objective to be changed using a smooth rotating adjustment ring. Reducing the iris opening increases depth of field, helping nearby objects appear clearer without requiring repeated changes to the night vision objective's focus setting.

Opening the iris allows more available light to reach the night vision device, which can be particularly important in darker environments. The adjustable design allows users to select an appropriate balance between depth of field and light transmission.

Near-to-Far NVG Focus Enhancement

The Tarsier Eclipse is designed to make it easier to view objects at different distances through a compatible night vision device. MATBOCK advertises the ability to see objects from approximately 3 inches to infinity using its variable iris system.

Actual image clarity depends on the night vision device, its existing focus adjustment, the iris opening and ambient illumination. Closing the iris increases depth of field but also reduces the amount of light reaching the objective.

Replaceable Sacrificial Lens Protection

In addition to its focusing function, the MATBOCK Tarsier Eclipse incorporates a clear sacrificial protective lens positioned in front of the night vision objective. This provides a replaceable barrier against dust, dirt, scratches and everyday environmental exposure.

The sacrificial lens can be removed and replaced without tools, allowing the protective component to be changed independently of the main focus enhancement device.

The current MATBOCK product listing describes a Gorilla Glass protective lens, while the referenced TNVC listing describes Corning Glass. Confirm the supplied lens specification for the exact production version if that distinction is important.

PVS-14 & Binocular Night Vision Compatibility

The Tarsier Eclipse is offered in two mounting configurations designed for different night vision objective housings. Selecting the correct variant is essential for proper fit.

Type 1 – NAVAIR / 37mm

The 37mm Type 1 version (880021-1) is listed for compatible systems including:

• AN/PVS-6
• AN/PVS-7 and PVS-7B/D
• ANVIS-9
• AN/PVS-14 and NEPVS-14
• AN/PVS-23 (F5050YG)
• DTNVG and DTNVS
• RNVG
• BNVD 1531
• PVS-31D

Type 2 – Ground / PVS-31A

The Type 2 version (880021-2) is listed for compatible systems including:

• AN/PVS-15
• AN/PVS-18
• AN/PVS-31A
• BNVD
• MUM-14
• GPNVG
• EOTech Bino NV-W

Compatibility Note: MATBOCK currently labels the Type 2 product option as 34mm, while some technical descriptions refer to a 33mm objective outside diameter. Select by the correct part number and confirmed NVG model compatibility rather than relying on the nominal diameter alone.

Lightweight & Compact Construction

The Tarsier Eclipse uses a hardened rubber housing with an adjustable optical iris. MATBOCK specifies a total weight of approximately 31 grams (1.1oz) per device, providing a compact addition to compatible night vision optics.

A retention lanyard with swivel hook is included to help secure the accessory to the night vision setup.

Technical Specifications

What's Included

• 1 × MATBOCK Tarsier Eclipse NVG Focus Enhancer
• 1 × Installed Sacrificial Protective Lens
• 1 × Retention Lanyard with Swivel Hook

Please Note: the Tarsier Eclipse is sold individually. A binocular night vision system requires two units if both optical channels are to be equipped. Night vision devices are not included.

Ideal Applications

• PVS-14 night vision focus enhancement
• Compatible binocular NVG systems
• Near-field observation through night vision
• Night vision objective lens protection
• Adjustable depth-of-field management
• Night vision training and observation

Why Choose the MATBOCK Tarsier Eclipse?

The MATBOCK Tarsier Eclipse NVG Focus Enhancer combines continuously adjustable iris control with replaceable sacrificial lens protection in a compact accessory for compatible night vision systems. Its adjustable aperture allows greater depth of field when required, while the removable protective lens helps safeguard the original NVG objective from dirt, dust and scratches. With dedicated PVS-14 and PVS-31 family mounting options, the Tarsier Eclipse provides a versatile solution for night vision focus management and objective protection.