SVBONY Svbony SV503 Ed Telescope, 80F7 Achromatic Refractor, Additional Dispersion Refractor OTA Dispersion for Astrophotography and Visual (80mm)

Achromatic aberration--Extra-low Dispersion(ED) SFPL-51objective lens have 1.497 refractive index and 81.6 dispersion coefficient with Lanthanum Series Glasses provide a real color image--double separation lens structure and can eliminate the chromatic aberration Crisp image--FMC ultra wide band multi-layer coating technology is used in the whole optical lens maximum reduce the reflection of lights--Doublet double separation lens structure maximum enhance the transmission of lights --The outside optic lens material is ED glass, and the inside optic lens material is Lanthanide glass provide crisp imageAstrophotographyThe double focusing wheel 360 degree rotation, which you can rotate the focusing wheel from right hands to left hands ,that is very convenient for astrophotogray2 inch to 1.25inch adapterThe 2 inch telescope scope focuser coming with a 2 inch to 1.25 inch adapter. So that you could also use all your 1.25 inch accessories to work with the SV503 telescope.Specifications:Aperture of objective lens：80mmFocal length：560mmFocal ratio：F7Lens Coated：Ultra-wideband coating（FMC）Objective Lens type：Double separation lens structureLimit magnitude：11.6Set the light force：130.6xResolution：1.5 ArcsecondsTelescope tube material：AluminumSurface treatment technology of mirror tube：Fine grain baking paintExtinction bar：Plastic blade barFocuser：2 inch Dual speed focuser, the gear ratio 1:10Package1x 80mm ED telescope primary mirror tube1x Metal hoop and dovetail