I just got back from the lab my very 1st slide film ever, a Provia 100F. The result is disappointing to say the least, of the 15 frames (Mamiya 645 Pro) most are almost completely black, one is overexposed beyond saving and the rest are very dark with not enough detail. Now, a couple of considerations first. Number one, It was my very 1st slide film so I had no experience and I might have messed up exposure-wise. Number 2 the Mamiya 645 I used is a new camera for me and I had only shot a B&W negative film with it before the Provia (which came out OK). All shots were sunset ones so I guess it was a high contrast scene, perhaps outside the films DR especially since no GND filters were used. So, possible reasons for the catastrophe: 1. I messed up the exposure 2. The scene was outside the DR of the film so using Provia was a bad idea. 3. I had to use GND filters (because of No.2) 4. The Lab messed up during the processing I am mostly concerned with No.4 because it Is something I cannot check easily. What is strange is that by using the Average metering I got really acceptable results with the B&W film. I clearly remember the last 2 shots with the Provia, I had it on Average and I shot 1 with normal exposure and 1 with +1 full stop of exposure compensation. The latter one is indeed just a little bit brighter but still too dark. I keep having the feeling that they might have overcooked the film during processing... Would appreciate some advice from any old-timers of slide film shooting out there since such film is very expensive and as we all know a lost shot is lost forever.