Originally posted by DAZ Like a lot of things Duplo just because we can measure something doesn’t mean that it is significant. Cameras and lenses are built to such high standards we sometimes think they are scientific instruments. They are not. They are machines that are built better then they needs to be most of the time. I to can see it on my lenses but just don’t need to worry about it. A long time ago lens revues use to measure this but with TTL metering they dropped it as not important.
Well in my case it actually is important knowledge... say when i switch from a 70-200 to a fast 50 during an event, I will need to make a correction to my exposure settings (as I prefer shooting manual mode), yes the metering info in the viewfinder will tell me the same thing, but knowing that I can drop the ISO half a stop when shifting to a fast prime and keep my other exposure settings unchanged actually is important at times.
I have not made a solid measurement of it, it is just something I have noticed while working and made a mental note of...
Originally posted by DAZ Measuring some things are pretty much useless. Take multi point metering and this is not to say don’t use it as it is a useful tool. With multi point it is basically not possible to determine what the camera is metering. Move the camera just a little and the metering point fall on different things. Even if they don’t move the data is put into an algorithm that some engineer come up with to try and make a good exposure. Change engineers and you change exposures. The only thing you can say is that it deferent then some photographer thinks it should be exposured. That is why cameras have exposure compensation controls so the photographer can make it what they want. Most of the time it is just an excuse to bash one camera brand over another.
DAZ
I am not sure I can follow all of what you write here... stuff like using to bash camera brands etc... why would anyone do that... I do not think I did that in my post above at least...
Not sure I got the link to multisegment metering either...
I guess it all depends on how you work, to me kknowing what I talked about in my first post is important for the way I work when shooting events.
I see knowing as much as possible about the gear one uses as important, it allows you to react to certain cituations by reflex and allows me to dedicate my mind to my surroundings.