srt101fan wrote:
A photographic image should be judged first on emotional and intellectual impact. Arbitrary measures such as sharpness, exposure, noise, white balance, composition, extent of manipulation, etc. should be second tier considerations.
I think I understand what you say. If by "first" you mean the most important consideration, you are right, and that's not an "opinion," but the standard of music, dance, art .........
However, there are some vague variables in all this. First, "emotional and[I would add "/or"] intellectual impact" for whom? Those who look at things just from their personal preferences would have a shallower view than professional critics or artists, for example. It is important for a professional to try to be objective, to understand the intent of, and tools used, by the photographer. For example, I don't like Diane Arbus, but must accept what she was trying to do, and then judge if it was strong and unique or clichรฉ.
Which leads to the second problem. "[S]harpness, exposure, noise, white balance, composition, extent of manipulation, etc" are the elements of Form. Form is part of how a good photographer conceives of "emotional and intellectual impact." Thus, a good viewer or photographer must take these, as appropriate, into consideration to establish the intent. Form is essential to understand and create the meaning of the art.
These are great disciplines, to feel and think without pre-judging what an image "should" be like. Most people don't bother, but justify their opinion with rationalization. You will find followers of the most common landscape photos and followers of Diane Arbus. The truth of Content and Form, end and means, exists at many levels. It is most important, when learning, listening, or teaching yourself, to ask"What's the reason for this?"