his is the very important
As technology advances, high pixel SLR camera,
high-definition video and high-resolution lenses
been introduced. All well known filter producers
continue to invest in new material to enhance
transparency and surface accuracy of filter to match
future high resolution lens requirements.
This is an evolutional change due to traditional
filter cannot meet future requirements of the new
level of photography. When traditional UV filter,
CPL (circular polarizer filter) mount to an advance
lens. It will cause image attenuation, optical
dispersion and other issues. Even worse it will
cause fail focus.
There are three common issues when a high resolution
lens adapt with a traditional filter.
1. Focus speed will drop a lot. But it will back to
normal when the traditional filter been removed.
2. Serious focus failure will happen on entry to
middle range of cameras. Focusing inconsistence or
error may be happened on a high end camera. Such
issue can be solved by remove the traditional
3. Image attenuated drop or loss detail can be seen.
It usually recognized as lens shift. Indeed it can
be solved by the traditional filter removed.
These three issues just like dirt or dust stick on
camera sensor that will cause the sensor reading
error, and cause slow focus or difficult to focus.
Therefore it should be understood easily that why
all major manufacturers focus on and investing to
new materials and precision grinding technology of