The B+W F-Pro 486 UV/IR Cut MRC 39mm Filter is an interference filter designed to reflect and break up wavelengths on both sides of the visible spectrum (infrared and ultraviolet) in order to gain a more pure transmittance of the visible spectrum. The filter is completely colorless and is comprised of thin layers with varying thicknesses, similar to a multi-coating. By utilizing this method of construction, unwanted UV and IR radiation is not absorbed but rather repeatedly reflected in order to affect and skew the wavelengths in order to provide a steep cutoff between spectrums.
- This filter is made from high quality and durable materials
- Helps reduce dust, moisture and scratches from reaching lens elements.
- This filter is significant for black and white photography.
This B+W Interference Filter has a completely colorless glass carrier coated with a number of extremely thin, partially reflecting layers with precisely computed thicknesses, similar to MC coating. The B+W Filter 486 does not block by means of absorption, but by interference of the unwanted UV and IR radiation that is repeatedly reflected between these layers, affecting the wavelengths on both sides of the visible spectrum with a steep cut-off. It is used mainly on digital and video cameras with CCD sensors without an integrated IR protection filter, because the IR sensitivity of the CCD sensor would otherwise cause color changes and unsharpness. That unsharpness results from the chromatic aberration of the lenses that are only corrected for visible light. In the visible range, the transmission curve is very high and straight. This filter is completely clear and it requires no increase in exposure. Its filter factor is 1.
