Traditional Culture Encyclopedia - Photography major - What kiND of nd filter is more suitable?

What kiND of nd filter is more suitable?

1. The exposure time is long, and ND 1000 (minus 10) is the best.

2.ND8 or ND 16 is only reduced by 3-4 gears.

3. Add ND4 to 1/500 seconds.

4. Add ND8 to 1/250 seconds.

5. The superposition of the two is negative 5 light, which becomes ND32.

6. The effect of superposition will be worse than that of single one.

Attached are the landscape photos taken by Nyquist ND 1000:

Photography: nisind1000+gnd20 77s Jingyue Lonely People ISO 50.