TY both, this question came up in my head using a vintage light meter (i just rather not have to pull my phone up or carry a extra thing in my pocket when out and about )with the camera against a meter app on on my phone (to get an idea of how accurate it is). the meter has speeds of 500, 250, 125, 60 etc.
The camera has speeds of 500, 250, 100, 50, 25, 10.
Because they didn't line up and with me being as green as grass, led me go down the rabbit hole
Re the sub 1m focusing, just did the test
@albada mentioned, and with the ring push to the smallest distance allowed (as shown in my pic), i get effective focusing to about 28-29 in. from the outer face of the lens.
I think the reason i have these questions are, is i dont know what i dont know in terms of acceptable +/- values for film. Ill get there sooner or later tho.