UVenus filter is an ultraviolet filter, which only passes 320nm-380nm ultraviolet spectrum. It is specifically designed for capturing the high contrast Venus cloud image.
Specifications: 1.25 inch, thread M28.5*0.6
Frame thickness: body 5mm+ thread 2.5mm, a total of 7.5mm
Glass thickness : 2.5mm
CWL (center wavelength):350nm
PV: 1/4 lambda