Florescent lighting has characteristics that affect color rendition. This color shift is not usually visual to the human eye but will cause adverse effects on film.
When shooting under "daylight" florescents your pictures will have a purplish tone. Hoya's FL-D filter corrects and restores a normal color balance.
In industrial situations you might encounter "warm white" florescents which will give a greenish tone, requiring Hoya's FL-W corrective filter.
Both filters are available in coated and multi coated (stronger flare prevention) versions and all popular sizes.
The Hoya 77 FL-W is commonly used for Color correction, Image manipulation and more.The Hoya 77 FL-W is most used by customers who consider themselves to be a Photo enthusiast, Semi-pro photographer among others.The Hoya 77 FL-W is popular because customers like the following qualities of the Hoya 77 FL-W: Clear optics, Easy to use, Firm mount, Strong construction to mention just a few.