Optolong UV/IR Cut 1.25" FIlter Newtonian For f/2 lenses or telescopes

For f/2 lenses or telescopes it is necessary to use 31mm filters

Diameter - 100mm

Reveal the gas giant – Jupiter with Sky-Watcher 100/900 Evostar ED Doublet OTA

This ensures that virtually all the light collected by the telescope will reach the eyepiece without the diagonal affecting optical performance

New ED (Extra-low-dispersion) glass

Optolong UV/IR Cut 1.25" FIlter Newtonian For f/2 lenses or telescopesOptolong UV IR Cut filter is designed for ultraviolet and infrared wavelength blocking to improve sharpness of the image as most of the optics are designed for the visible spectrum, because its very difficult to create a lens with the same focal point for the visible and IR spectrum. It is used on a digital camera and the video, which do not have an IR protection filter toward an image sensor or were remodeled. This is important because unfiltered CCD