More aperture for astrophotography and vistual: provide good image with high contrast; ED glass means visible colour aberrations are reduced to minimum with sharp image; all lens surfaces have been provided with multi coated to reduce reflections
For astrophotography; sometimes more focal length is required in order for them to be seen at a reasonable size in the image especially for compact objects; there is also no shadowing apparent on small image format camera chips for big plus;
Larger diameter has more scope for lenses: 2 inch diameter allows to insert 2 inch eyepieces into this barlow with double magnification; the large lens diameter also means you will notice no shadowing in the image;
Take your astrophotography to the next level with this filter; all filters in the set block ultraviolet "UV" and infrared "IR" wavelengths for higher contrast CCD images
The Astromania LRGB Filter Set includes four filters; 1.25" luminance Filter; 1.25" Red Filter; 1.25" Green Filter 1.26" Blue Filter; this LRGB filter set allows you to use your monochrome CCD camera to put together high resolution colour