This brings up a technical question I've had for a while. How does the *camera* (or the lens, in the case of some DSLRs) know when it's in focus?
Does anyone have a link explaining how it works? I looked it up on Wikipedia, but I was hoping for something a little more in-depth....
I cannot go to technical b/c I just do not know, but I am pretty sure that it knows that it is in focus when it finds the most contrast. I believe that is why experts say to focus somewhere that has edges and then re-compose the shot b/c if all it has to look at is flat, it is difficult to distinguish the edges properly.
Hi, I pretty much decided on going with the Fuji F31FD but I do have another question for you wonderful people. When we will be going back to Disney in October, how will I know which ISO to use for Spectro, Boo to you, Fantasmic and rides(i.e. Pooh, Splash , pirate rides) in order to get good results? Also, must I avoid using the flash for all the above shows/parades/rides or only for Spectro? I did read a few articles about the way ISO works but when they say to use a high ISO, is it high ISO1600 or high ISO3200? (Considering that I will be making 4X6 prints only). Thanks a zillion, Jozy
It all really depends on the situation, but sometimes the flash decision is made for you by WDW. If they say no flash, then you need to look towards high ISO. There are times when flash is allowed, but not preferable anyway. An important thing to remember is that the flash is only effective for a matter of feet. If you are using the flash, then make sure the ISO is set to a low setting or on auto or you risk washing out the photo. Plus it gives you unnecessary image noise.
For indoor rides, flash is usually not allowed and for outdoor rides it is not effective or usu. even needed, so generally flash is not an issue for rides. For shows, unless you are in the front row the flash is probably not strong enough to make a difference anyway. You also do not want to blind the performers b/c it can make their job dangerous. Often you are told to turn off the flash at shows. For daytime parades, you might actually have a use for the flash. Forcing the flash in daylight can help if there are shadows in your frame. Keep that in mind for all daytime shots. For night parades, it depends on the lighting and the subject. I never use flash for Spectro b/c it exposes the framework of the floats and really kills the magic. Plus it can wash out the light from the bulbs. I mixed it up with the
MNSSHP parade. Some shots just would not work well with a flash, but others did. It has very different lighting than Spectro. To do this switching, you need to know how to change your flash and ISO settings quickly.
What ISO to use comes down to the shutter speed and aperture used. With a p&s, you can pretty much keep the aperture wide open and not worry about not having enough depth of field, so in low light I would use the widest setting (usu. around f/2.8 on a p&s). That allows for a faster shutter. Then adjust the ISO to get the proper shutter speed. I am sure someone else is better than me at this, but I would say that a shutter of 1/60 is good for a subject with little motion like a portrait shot of your kids. It partially comes down to getting a feel for it. You obviously cannot use the same shutter speed for a parade that you use for shots of someone running.
One last thing to remember is that using a wider angle allows more light in, so for low light it is best to keep it wide. You can always crop the picture later in software.
Kevin