UV filter is probably most used filter of all.
They were more important years ago, but their usage is still useful today.
First, little simplified psychics.
The lights we see is from one specific range of possible wavelengths (light is electromagnetic wave). The shorter the wave length, light is more bluish, the longer - it is more reddish. When the length of the wave gets too short for our eyes to see it, we call that light an ultraviolet light, or UV light. Just because we don't see it, it does not mean that it can't be detected by some instruments. And here is where our problem occurs.
The UV lights and visible light both hit exposure sensors. So, actually, the sensor receives more signal, than we see (because UV is invisible to our eyes, but not to our camera sensor). Recorded UV light makes resulting image to appear brighter and with lower contrast than we see it.
Years ago UV filters were important because film records UV light very well.
The sensor is still sensitive to ultraviolets but not as much. In addition to that, all new lenses have special coatings which filter that unwated part of the light.
You might ask: so, why are there so many UV filters on market today?
The most common reason for mounting UV filter on your lens today is protection. If you are photographing on a field (lots of dust) or at any location where there is possibility that your expensive shiny new lens might be damaged - UV filter is here to help. It might be damaged, but who cares - it's price is like .. hundred dollars, but the price of the lens can be in thousands of dollars.
Theory says that anything that you put between sensor and the object will degrade image quality and probably improve possibility for flare. Same applies to any filter. Degradation is really small and with good filter actually non-existent.
Should you use UV filter or not?
It is a personal decision one has to make. I will tell you mine.
On a location (example when shooting off road rally) - you can bet that my UV filter will be on my lens.
When I am shooting for stock in controlled environment, I usually do the work without them.
CPL - circular polariser filters
Short Information Detailed information Examples Short information This is second article on photography filters. You can read the first one on UV photo filters. For those of you that don't want to get too technical, here are major benefit
Weblog: photography-reviews.com - everything you wanted to know about photography Tracked: Aug 02, 23:36
Short Information Detailed information Examples Short information This is second article on photography filters. You can read the first one on UV photo filters. For those of you that don't want to get too technical, here are major benefit
Tracked: Aug 02, 23:36