TS-Optics Variable Polarising Filter 2" (FXP2) for Moon and Planets

If you’ve ever looked at a half moon through a big aperture and thought, “Cool… I’ve been flashbanged,” this is the fix. The TS-Optics FXP2 Variable Polarising Filter lets you smoothly dial down brightness so you can keep contrast high and tease out fine lunar and planetary detail—without tinting the view or softening sharpness.

• Smooth brightness control for comfortable observing and better visible detail

• Adjustable light transmission from 1% to 40% (fine-tune it to the phase of the Moon or the target planet)

• Neutral color: dims like a grey filter without shifting the object’s color balance

• 2" filter thread compatibility: screws into the filter thread of all standard 2" eyepieces

• Twist-to-adjust design: brightness changes by rotating the lower section

• Built with high-quality aluminum cells that rotate against each other smoothly

• Anti-glare, plane-parallel glass elements help preserve sharpness and contrast

• Great for:

  • Moon (all phases—especially the “wow that’s bright” ones)

  • Planets (reduce glare so surface detail is easier to see)

  • Daytime observing

  • Solar observing only when used with a proper front-mounted solar filter

• No added optical length: won’t steal your focus travel, so you can still reach focus normally

Specifications

• Model: TS-Optics FXP2

• Filter size: 2"

• Transmission range: 1%–40% (variable)

• Color effect: Neutral (no color shift)

• Optical elements: Two linear polarizing elements; plane-parallel, anti-glare glass

• Adjustment method: Rotate the lower filter section to change dimming factor

• Housing: Aluminum cell construction

• Eyepiece compatibility: Fits the filter thread of standard 2" eyepieces

• Optical length impact: No additional optical length added (focus remains achievable)