Bandpass filters and neutral density filters
were used to control the wavelength ranges and UV irradiance levels, respectively.
The logarithm of the time value corresponding to the intersection of the horizontal line and the curve for each neutral density filter
was plotted against the logarithm of the integrated spectral irradiance transmitted for that neutral density filter
Tenders are invited for Neutral density filter
(fwt-82 c) specification: it should have traceability certification.
Tenders invited for Supply and warranty of circular linear variable neutral density filters
Bartley points out that chips in digital cameras are so light-sensitive that one has to add neutral density filters
or reduce the aperture.
There was a wide range of CET-accredited practical workshops available to delegates, ranging from Advanced retinoscopy and Advanced optic disc assessment in glaucoma to Binocular balancing using micro-prisms and Neutral density filters
, all of which were presented by knowledgeable professionals sharing a wide range of experiences to attendees.