On 30 Dec 2013, at 17:50, Ciprian Dorin Craciun <[email protected]> wrote: > >> On Mon, Dec 30, 2013 at 7:29 PM, Bob W <[email protected]> wrote: >> Unfortunately you can't separate the technical and aesthetic properties. For >> example, you ask >> [...] >> >> And I ask in return what does "properly focused" mean? It depends on what >> you intend for the picture, so it cannot have a single once-and-for-all >> answer - you have to make a subjective, aesthetic judgement. >> [...] > > Unfortunately there was a misunderstanding / miscommunication in > my purpose. Thus I'll want to make some clarifications (which maybe I > didn't properly make in the context section): > > I very well understand that all technical decisions must match the > subject at hand. That's why I've stated that for the same scene (by > which I mean subject) I have multiple, almost identical, exposures, > which vary slightly especially in exposure (at most 1 stop), > auto-focus error, or possibly blur due to improper hand-held camera. > > Thus I don't want to find a mathematical answer to "which > technical setting is the best for a particular subject", but to the > answer to the question "from a set of almost identical images which is > the 'optimal' in terms of technical qualities". >
Yes, but you've just asked the same thing in a different way, so you will get the same answers. Only you can decide what is optimal, based on your intentions in taking the picture. There is no general set of rules. > >> "Sharp enough" for what? > > I'll give a small example: with my old P&S Fuji S5600, without > any image stabilization, at night I had to resort to 1/4 seconds > exposure (the sensor is quite small, 1/2.3 inch, thus the sake is less > than in APS-C). After a few time I've observed that if I shot in a > burst of three pictures, one of them (usually the middle or last one) > were less "fuzzy" than the other. > > Thus "sharp enough" in this context means the one in which lines > (or edges) are "contrasty" enough to obtain something useful after > sharping. > "In this context". But when the context changes the decision criteria will also change. You have to look at it and decide which you like best. And that decision may change, depending on your purposes each time you look at it. > >> What is "correct" exposure? > > In this case it is more simple. Given that I've already chosen > what to prioritize in exposures (highlights, shadows, or mid-tones), > which of the few exposures best represents my choice. You have to decide for yourself. How would a piece of software know that, unless you told it? And if you know what to tell it, then you've made the choice, and you don't need the software. B -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
