Recently I posted a question to ask about the necessary solar filter required to shoot an eclipse. I was given the name of a company called Optcorp who I was told could help out. Yesterday I spent much of the afternoon talking to a helpful sales person but it was very much a case of umming and ahhing. By that I mean the sales person was used to people buying filters for telescopes and binoculars but not for cameras.
Despite this long ongoing conversation I came away non the wiser the sales guy didn't know whether to sell me Astro Zap solar film, or Thousand Oaks.
I'll be using a Canon 24-105mm L lens. I intend to shoot the eclipse in time lapse then layer each successive moon/sun into one image with a separate exposure for the foreground.
It was suggested I use a 10 stop neutral density filter, but I wonder is this acceptable.
I have a ND10 and I'd do a practise session if I could see the sun, but it's snowing outside and we haven't seen the sun properly for a week or more. I'm using a Canon 5D2 so I could shoot f22 at 8000 sec with a ND10.
I guess I imagined I could just buy a screw on filter to fit the 77mm diameter of my lens. It would seem not.
Any advice would be greatly appreciated.