Shooting slide film at the best of times can be difficult to nail the exposure. Go under the canopy and it can be even harder to perfect. Slow film, reciprocity failure of that film, center filter adding one stop and then a polariser adding two stops. All adds up to quite a long exposure. At least under the canopy the lighting it quite even.
From memory this would have been about 3 min at F16 on the Fuji GX617. If shooting on digital I would have looked at getting my shutter speed to about 1 sec. You get better water detail and also it avoids the highlight at the bottom of the water fall. On this shot even though the highlight is bright it isn’t pure white which is good. If it was it would need repairing.
Heading out this weekend to shoot more under the canopy shots. Undecided if it will be the Blue Mountains or Barrington Tops. Kind of leaning towards the Barrington Tops. See how the weather is come Saturday / Sunday.