SVBONY SV135 Zoom Eyepiece, Zoom 7 to 21mm 1.25 Inch Telescope Eyepiece Bundle with SV231 1.25'' Color Correction Filter, Correct Edge Chromatic Aberration for Moon Planetary Visual

The SV231 1.25‘’ color correction filter is designed with full thread and standard size to compatible with different types of telescope. High transmittance means high level of transparency, allows a significant amount of light or energy to transmit through it. You can use the SV231filter with SV48P telescope for astronomical observations without color difference to obtain the most exquisite details of lunar craters and planetary surfaces. SV135 fully multi-coated zoom plossl eyepiece zooms to any focal length between 7 mm and 21 mm - pick the better magnification for your subject. As a beginner; SV135 zoom eyepiece is good for starter astronomer! The SV135 is stiff enough not to accidentally change focus and smooth enough to rotate without having to hold the eyepiece base with your other hand. 7-21mm which will give you a wide range of magnification options. This is especially useful in lunar observing where one short barrel twist at a time will bring you closer, closer, and closer still to the Moon’s craters and mountain ranges to the point where you get the feel of looking down at the lunar surface from an orbiting space station.

• Correct chromatic aberration; SV231 telescope filter prevents unwanted color banding in the blue spectral range; minimizes blue wavelengths in out-of-focus areas
• OD＞4; the higher the filter cut-off depth; the smaller the noise and the higher the imaging contrast
• Full thread design; M28.5×0.6 specification; male thread; strong and durable; supports different types of filters for superimposed use
• SV135 7 mm to 21mm adjustable focal length;SV135 7-21mm zoom eyepiece equivalent to multiple eyepieces ;obtain higher magnification with short focal length;It could bring you a better observation experience in a comfortable situation with high-contrast imaging
• 18mm - 16.3mm comfortable eye relief; especially for eyeglass wearers ;designed primarily for viewing landscapes and astronomical observations of lunar surfaces; planets; nebulae; clusters; and diffuse nebulae