this is... it is quite easy to make a film having amazing highlight latitude, just including in the emulsion a share of very small silver halide crystals with no speed enhancing addings. That share can even be under the main layer in BW films, in the shadow of the main layer. It is quite easy than an emulsion component has very low speed, as my DIY dry plates shows
in fact fim is able even to record detailed (initial phase) nuke exposions, with the very simple POTA developer, recording even 20 stops DR, IIRC.
https://en.wikipedia.org/wiki/Rope_t...ope_tricks.jpg
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