The Cokin Z-PRO 020 80A Color Conversion Resin Filter is blue. It is used to balance daylight film under artificial, tungsten or standard (household) incandescent lighting.
Let's say you're at a family gathering and you've brought your camera and want to take some photos of this once-a-year gathering. You have traditional daylight balanced film but find yourself in a room filled with table lamps. If left unfiltered, your photos will turn out yellowish. Under certain circumstances, perhaps a nice effect but not flattering in terms of skin tones or what our eyes are used to seeing or expecting. Enter the 80A filter!
This filter allows you to "balance", i.e. bring back, correct color tone to your images. There is some loss of film speed that may require the use of a tripod but, at least, your photos will demonstrate the proper tonality they so richly deserve.
The Z-PRO Series is recommended for focal lengths of 20mm onwards (in the 35mm format). This filter is made of CR39 Resin which is a reputable lightweight and unbreakable optical material also used for ophthalmic glasses.
| Type | Z-PRO Color Conversion |
| Size | 100 x 150mm (4 x 6"), 1.5mm thick |
| Grade | 80A |
| Filter Factor | 2 (+1 stop) |
| Multi-Coated | No |
| Rotating | No |
| Effect | Balances daylight film for use with most standard tungsten lighting, studio lighting and copy stand lighting |
| Application | Used to shoot daylight film under artificial (household) lighting conditions |
| Color Temperature | Increases color temperature from 3200-5500 Kelvin |
| Construction | CR39 Resin |
| Front Filter Thread Size | Not Applicable |
| Front Lens Cap Size | Not Applicable |