Solar disc with telephoto lens and Hoya ProND filters

[drjolo]

Recently I purchased 67mm Hoya ProND filters for my everyday camera. The set contains three filters - ND8, ND64 and ND1000. Once I have seen them I immediately decided to test them on the Sun. ND1000 filter alone was still too bright and I needed to stop down SIgma 100-400 lens below f/11 to reach 1/8000s exposure. I feared that resolution might be already limited with such a stopped lens, so I stacked ND8 and ND1000 filters to get "ND8000" and all worked fine.

Images below are 1:1 crops from Sigma 100-400 lens and Sony A7II camera - these are single 1/8000s shots at f/7.1.

And a single 1/100s shot of the Moon with the same setup (but no ND filters). I was a bit surprised some color could be revealed from the single shot only using a few adjustments in Adobe Camera RAW.