K&F Concept 95mm ND100000 Fixed Neutral Density Filter provides 16.6 stop light reduction. That's the suitable level of light reduction for a super telephoto to photograph the blinding sun. I used live view on the tilting camera LED screen to view the sun versus peering into the viewfinder. As the light level was safe, I viewed through the viewfinder with some dark polarized sun glasses on to further protect my eyes.

Initially I set my Nikon D850 camera to aperature priority which worked fine and now I'm shooting in manual mode for full control. My Nikor 200-500mm lens and 1.4 teleconverter gets up to 700mm at f6.3 max aperature. With full zoom, I get a good exposure @ ISO 64, 1/250second & f/11 aperature w/ -1 stop under exposure to avoid exposure wash out.

Light balance is on auto and I get a very white/grayscale image. Changing white balance to daylight renders a yellowish tint. But with the sun, daylight is pretty white and likely in post processing I can change the white balance. I'm hopeful that for the upcoming solar eclipse, I don't have to make too many other major adjustments so I can take a series of interval shots to capture the eclipse cycle.

This lens filter is a uni-tasker. Other than using this specialty filter for looking at the sun, there may not be other common uses for this at 16 stop ND filter. So for the price, this is one of the great value for for safe sun photography.