Svbony H-Alpha 7nm Filter 2x barlow lens and no halos in your

and no halos in your final astrophotography images

Vixen ED81S

Product Manual

Pager button battery capacity 50mAH

or any combination to suit your environment

Svbony H-Alpha 7nm Filter 2x barlow lens and no halos in yourOptical high precision double sided polishing to ensure that the parallelism is higher than 30 inch and high flatness 1 4; to ensure that IT does not affect the image quality Precision double sided optical coating; non two piece glue ; To effectively improve the transmittance and cut off depth Ion source assisted coating technology (IAD), to improve the density of the film to ensure that the filter wavelength minimizes the impact of temperature caused