SVBONY Barlow Lens Correction Lens 3x Chromatic Aberration Inch Diameter Multiplier Mirror Telescope Adapter for Astronomical Photography Black

3x Barlow Lens: The 3x Barlow lens can extend the focal length of the 1.25 inch eyepiece by 3 times. Lens structure: 3 elements in 2 groups. Increases the magnification of the astronomical telescope by 3 times. You can observe more details. Chromatic aberration: This Barlow lens is extremely effective in correcting chromatic aberration.It also has excellent sharpness, resulting in a clear screen. Multi-coating provides better and sharper images. Highly versatile: High-grade optical glass is used for the lens material, making it highly versatile. Compatible with 1.25" diameter telescope eyepieces and filters. Also compatible with digital cameras, reflex cameras and other T-thread type accessories. All-Metal: The material is all-metal, strong and durable. Since it is metal, it is not easily scratched. In addition, the long focus eyepiece with ample lens diameter can be used at high magnification, providing stable image quality with high contrast and sufficient eye relief when observing the moon and planets. SVBONY Telescope Accessories 1.25 Inch 3x Chromatic Aberration Barlow Lens Correcting Lens Multiplier Mirror Telescope Adapter Role of Barlow Lens: Telescopes with a small F number have a large angle of incidence on the eyepiece, which increases spherical aberration and tends to impair the performance of the eyepiece itself. When used in conjunction with a Barlow lens, this angle of incidence can be reduced and a sharp image can be obtained without compromising the performance of the eyepiece. Furthermore, the Barlow lens corrects the curvature of the telescope's focal plane, dramatically improving image quality deterioration (astigmatism, coma, etc.) around the field of view, which is a problem especially with telescopes with small f-numbers. Another great advantage is that a long-focus eyepiece with ample lens diameter can be used at high magnification, providing stable image quality with high contrast and sufficient eye relief when observing the moon and planets.