Lol.
Probably none of the above! Amount of water blur strictly dictated by film speed, the fact the sun had set half an hour ago, reciprocity failure and a desire to use the optimum aperture. Sometimes I like film for the creative control it actually takes away in conditions like this.
F22, 8 seconds, 90mm lens. Adox chs 100 exposed at 50 and dev'd in rodinal for 11'30" as opposed to my normal 10 to push some contrast in.
I could have used a larger aperture, but that would have meant less sharpness but I only wouldve gained 3 stops max. I could have pushed to ISO 400 but the grain is mental on adox when pushed. 4 stop gain maybe. So I could maybe have squeezed it to 1/16th second at a massive loss of image quality.
So there you go. It's good when you have to explain stuff as it makes me think objectively and detached from something that was verymuch attached and subjective at the point of creation.
God I sound like a pompous arse sometimes lol.
It is what is. And that's what the viewer perceives it to be.