ZWO Extra 2" Filter Holder (Generation 2) for ZWO Nikon, EOS, and Gen 2 M54 and M42 Filter Drawers

ZWO F-HLDR – Precision Filter Holder for Your Astrophotography Needs

Astrophotographers know that the difference between an average image and a stunning deep-space masterpiece often comes down to one simple factor: filter quality and placement. The ZWO F-HLDR is designed with that in mind, offering a secure and efficient way to swap filters while maintaining perfect optical alignment.

Designed for Seamless Integration

The ZWO F-HLDR is engineered to work effortlessly with ZWO’s lineup of filter drawers and cameras, making it an essential accessory for astrophotographers using monochrome or color cameras with interchangeable filters. Whether you’re capturing nebulae in narrowband, dialing in perfect color correction for planetary imaging, or reducing light pollution in an urban setting, this holder ensures quick and stable filter changes without introducing tilt or misalignment.

Precision Machining for Optical Accuracy

Crafted from high-quality aluminum and anodized for durability, the ZWO F-HLDR maintains the structural integrity needed for precision astrophotography. The internal surfaces are carefully designed to minimize reflections and stray light, ensuring that your long-exposure images remain free from unwanted flares or halos.

Effortless Filter Swapping

One of the biggest challenges with traditional filter wheels is the need for motorized control or manually rotating through multiple positions. With the F-HLDR, you can simply slide filters in and out, making changes faster and more efficient—perfect for when conditions change mid-session or when switching between different targets requiring different filter combinations.

Secure Fit with No Light Leaks

A loose or poorly secured filter can ruin an entire imaging session. The ZWO F-HLDR is built with precision locking mechanisms to hold your filters firmly in place, eliminating any risk of movement or vibration that could degrade image quality. The snug fit also ensures that stray light stays out, providing contrast-rich, high-clarity results.

Compatible with a Wide Range of Filters

• Compatibility: Works with Gen 2 ZWO filter drawers, including:
  • M42/M48 filter drawer (Gen 2).
  • M54 filter drawer (Gen 2).
  • ZWO Filter Drawers designed for Canon EOS and Nikon cameras.
• Filter Accommodation: Designed to hold 2-inch round filters, both mounted and unmounted, with dimensions of 50.8 mm in diameter and 7.5 mm in thickness.
• Threading: Equipped with M48x0.75 threads to secure mounted 2-inch filters

Ideal for Deep-Sky and Planetary Imaging

From capturing intricate details in faint galaxies to highlighting the dynamic cloud bands of Jupiter, the ZWO F-HLDR supports a wide range of imaging styles. Narrowband imagers will appreciate the ease of swapping between H-alpha, OIII, and SII filters without disturbing camera positioning, while broadband users can quickly switch between light pollution filters and color-enhancing options as needed.

The Perfect Addition to Your Imaging Setup

For astrophotographers who demand quality, ease of use, and a solid build, the ZWO F-HLDR delivers. Its simple yet highly effective design eliminates frustration, allowing you to focus on capturing the night sky with the best possible results.

Upgrade your astrophotography workflow with the ZWO F-HLDR—because every photon matters when you're imaging the cosmos.

Important Note:

This Gen 2 filter holder is not compatible with first-generation M42/M48 or M54 filter drawers. Be sure to verify your filter drawer's generation before purchasing.