Rollei RPX 25 in Rodinal ? (real Rodinal, not the R09 stuff)

[Willie]

Sodium Ascorbate can give finer grain with Rodinal.
As for "I'm surprised that you found underexposure with 12 minutes in Rodinal 1:50, given
the datasheet recommendation of 11 minutes", this does not make sense. Underexposure has nothing to do with development time.

[Leigh]

The 9% solution was a common alteration suggested by Edwal for his FG-7 in the Seventies (perhaps earlier). Looking at my negatives of that era suggests that it was a bad idea. Not fatal, but the loss in acutance is regrettable.

Thanks, Jac. I appreciate that info.

Given that I'm an incorrigible grain peeper (modern day pixel peeper), acutance is of primary concern.

- Leigh

[Leigh]

Underexposure has nothing to do with development time.

Underexposure has everything to do with the presence or absence of a latent image in the emulsion.

Since the user was giving more than adequate development, any shadow detail should be present.

- Leigh