I am planning on photographing an upcoming partial solar eclipse here in Singapore but I'm having trouble finding solar filters for the lenses I will be using.
I have a Canon EF 500mm f4/L IS II USM and an Canon EF 70-200mm f/2.8L IS II USM.
The 500mm takes a 52mm rear mounted ("drop in") filter and the 70-200mm takes a 77mm front mount filter. To photograph the eclipse I am looking for ND 5.0 (16 f-stop drop!) filters.
I have found Thousand Oaks sells these but cannot find a way to purchase them in Singapore or ship them in time from the eclipse at a reasonable rate.
Additionally I am concerned, based on what I read about using a rear filter on the longer lens for solar photography.
I have find the Thousand Oaks telescope solar filters - but I need to figure out which size - if any - will fit these lenses as they are friction mounts. Does anyone have experience with such a setup?