Here's a little story....
Aside from being a photographer, I work as a re-recording mixer in TV and film. Several years back, I was working in the sound department at Universal Pictures doing restoration of old films. At one point, we restored the audio for many of Stanley Kubrick's films, one particular one was "The Shining." Well, the source audio for this title had many problems including hiss, broadband noise, hum, thumps, pops, etc. During the restoration process a decision was made with respect to how much hiss and broadband noise was to be removed. This actually occurred scene by scene based on the audio content of that scene. Well, the music score at many points in the movie had high-frequency pizzicato strings. This forced us to keep the hiss level somewhat higher than normal to keep the music as originally intended.
After the soundtrack was restored, the film and audio were delivered to another facility to be used in a telecine transfer. At this facility, the telecine operator thought that the soundtrack had too much hiss and chose to EQ the audio and reduce it. He thought that it was a technical flaw. In many situations this may be true, but not so in this particular instance. The restoration of this track took a couple of weeks and was client supervised. The amount and volume level of hiss was a necessary by-product.
Take a guess as to what happened to Mr. Telecine-I'll-fix-your-technical-flaw-man? He got fired!
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Moral of the story: Discuss openly with your client (the photographer) about anything you interpret as technical flaws. You're only doing yourself a favor as well as your client.