Optolong UV/IR Cut Filter 1.25" & 2"

The Optolong UV IR Cut Filter is a high-quality broadband filter designed to improve image clarity in astrophotography by blocking both ultraviolet and infrared light while allowing the full visible spectrum to pass. This results in sharper star images, better colour accuracy and cleaner frames when using DSLR, mirrorless or dedicated astronomy cameras.
 
UV and IR wavelengths can create colour fringing and softness in images, especially when using refractors or telescopes without well corrected optics for those wavelengths. The Optolong UV IR Cut Filter removes those unwanted wavelengths at the camera sensor level, helping you capture crisper stars, finer detail and more accurate colour balance across the field.
 
This filter is available in both 1.25 inch and 2 inch formats, making it compatible with a wide range of astrophotography setups. It works well with refractors, reflectors and compound telescopes, and performs reliably with colour cameras, OSC cameras, DSLRs and mirrorless systems.
 
Technical Features
• Blocks ultraviolet light and infrared light that can soften and blur stars
• Transmits the full visible spectrum for natural colour balance
• High transmission coatings for minimal light loss and improved contrast
• Optical glass polished to high standard for clear, sharp imaging
• Available in 1.25 inch and 2 inch sizes for broad compatibility
• Ideal for visual observing and astrophotography alike
 
Why Astrophotographers Use It
The Optolong UV IR Cut Filter helps correct focus mismatches and improve edge sharpness caused by UV and IR wavelengths. It is especially useful with refractor telescopes and high resolution sensors that are sensitive to a wide range of light. By removing unwanted light outside the visible range, the filter gives you cleaner frames with better overall image quality and more pleasing star colour.