Solar filter

[Tsleel2811]

Does anyone know where I can buy I good solar filter for the eclipse this close to the date

1000 oaks are out of stock

I have a 100-400L version 1

A threaded filter is the best but I can't find any one that has 77mms in stock

So if anyone knows the circumference of the outer tube and where I can get the filter.

Please and thank you

[jrhoffman75]

B&H claims to have these in stock:

Formatt Hitech 77mm Firecrest Neutral Density 5.4 Solar Eclipse Filter (18-Stops)