Many ultraviolet (UV)-filtering chemicals commonly used in sunscreens interfere with the function of human sperm cells, and some mimic the effect of the female hormone progesterone, a new study finds.

By using the softkey “Function” (Arrow) you can enter the device functions incl. Photometer or Spectrometer test. (B) Functions overview of the BioSpectrometer and BioPhotometer D30: The photometer or ...

The UV filter is a great way to add a little bit of additional protection to the front of your lens, and the latest range of "Realpro" filters from Kenko have an anti-stain coating, anti-reflection ...