iOptron OIII 1.25″ Filters

iOptron OIII 1.25 - Discover the Hidden Structures of Nebulae

Bring contrast and detail to life
The iOptron OIII 1.25 lets you see nebulae like you've never seen them before. This filter focuses on light from ionized oxygen - exactly the wavelength at which nebulae glow brightly. So you can see fine structures, faint filaments and subtle transitions that are normally lost in light pollution.

Narrowband filter with 7 nm precision
With a halving width of only 7 nanometers, the filter allows only OIII light to pass through at 495.9 and 500.7 nm. All other light - from streetlights to the moon - is blocked. That means: more contrast, deeper colors and cleaner images. Perfect for astrophotography of planetary nebulae and supernova remnants.

Sharp images with every shot
The multiple coating prevents reflections and ghosting, so your shot stays clear even at long exposure times. The result? Clean details and tight contrast - ideal for capturing subtle nebular structures.

Durably built, easy to use
The aluminum mount is light but sturdy, allowing you to effortlessly snap the filter into your 1.25″ filter wheel or eyepiece mount. The finish is flat and plane-parallel, which prevents distortion. So you get a clear image, shot after shot.

Your advantage
With the iOptron OIII 1.25, you get more out of every session. You'll see nebulae with depth and texture, even under less dark skies. An essential upgrade for anyone who wants to take their deep-sky photos to the next level.

Specifications

Capacity

Optics

General

Application