ZWO UV/IR Cut 2″ Filter

ZWO UV/IR Cut 2″ Filter

Block UV and IR Light for Sharper, More Detailed Astrophotos

The ZWO UV/IR Cut 2″ filter is designed to block ultraviolet and infrared light - two major causes of blurry, low-contrast astrophotography images. By passing only visible light between approximately 400 and 700 nm, this filter helps you get noticeably sharper results from your telescope. It suits both beginners taking their first planetary shots and experienced astrophotographers who demand precise, clean data.

Why UV and IR Light Damage Your Images

Camera sensors - whether webcam, CCD or CMOS - are sensitive to UV and IR wavelengths that the human eye cannot see. Unlike traditional photographic film, these sensors pick up all of that extra light. Telescope optics are rarely corrected for UV and IR, because historically there was no need to account for them. The result is chromatic aberration, halo effects and a loss of fine detail.

Without a UV/IR cut filter, your images of planets, the Moon or star fields will show softened edges, reduced contrast and unnatural colour. Adding this filter removes those problems at the source.

When to Use the ZWO UV/IR Cut Filter

This filter is particularly useful whenever your optical path includes any glass element - a lens, corrector, eyepiece, Barlow lens or camera AR window. In each of these cases, UV and IR light scatters inside the system and degrades the final image. The ZWO UV/IR Cut filter eliminates that scatter.

Lunar and Planetary Imaging

For Moon and planetary photography, sharpness and contrast are everything. This filter brings out crater walls, mountain ridges and lunar plains with exceptional clarity. On planets, it helps reveal subtle atmospheric structures and colour gradients that would otherwise be lost in IR haze.

LRGB Astrophotography

The ZWO UV/IR Cut filter is an excellent choice for luminance frames in LRGB imaging. It ensures that your luminance channel carries only clean, well-defined visible-light data - free from unwanted spectral contamination that would reduce resolution and colour accuracy in the final combined image.

Build Quality and Compatibility

ZWO manufactures this filter on a 2 mm thick glass substrate. That thickness gives the filter mechanical durability while keeping its effect on the optical path to a minimum. The surfaces carry anti-reflection coatings that reduce internal reflections and maximise transmission across the visible spectrum.

The filter uses a standard M48x0.75 external thread, making it compatible with a wide range of cameras, adapters and accessories. The 2″ format fits directly into a focuser or a filter wheel without any additional adapters in most setups.

Technical Specifications

About ZWO Filters

ZWO is a globally recognised brand among astrophotographers. Their filters are manufactured to tight spectral tolerances and pass strict quality control - so every unit performs as specified. ZWO produces a full range of imaging accessories, and their UV/IR cut filters are among the most widely trusted in the community.

What You Get

• Clean, sharp images with reduced chromatic aberration and halo effects
• Higher contrast in lunar and planetary photos
• Accurate colour rendition by removing out-of-band light
• A reliable luminance filter for LRGB deep-sky imaging
• Durable 2 mm glass substrate with anti-reflection coatings
• Standard M48x0.75 thread for broad compatibility
• Easy installation into any standard 2″ focuser or filter wheel

Is This Filter Right for You?

If you photograph the Moon, planets or deep-sky objects with a camera sensor, a UV/IR cut filter is one of the most effective upgrades you can make. It solves a problem that no amount of post-processing can fully correct. The ZWO UV/IR Cut 2″ filter is a practical, well-made tool that removes unwanted light before it reaches your sensor - giving you better raw data and better final images every time you observe.