- Description
- Specifications
Description
The C4 color correction filter cools the ambient light entering the lens by 350° kelvin (-40 mired shift) by adding blue to the overall exposure. This filter helps fine-tune the color or look of your scene to match your film's white balance.
The Hoya C4 filter is helpful when:-
You are using tungsten-balanced film and the light source is warmer than the traditional 3200° K and you need a specific amount of color correction to match your film type. Candles and low watt incandescent bulbs are examples of warm light sources.
-
You are shooting at sunrise or sunset with daylight-balanced film (5500° K) and the overall scene is too warm. The filter will help cool the scene for a more natural look.
HOYA Multi-Coat (HMC) filters are recommended for enhancing the performance of today’s multicoated lenses. These popular filters minimize reflection, reduce flare and ghosting, and result in over 97% average light transmission.
Comparison of C Series Filters:| FILTER | Cooling Amount | Equivalent |
|
C2 |
200°K (-20 Mired Shift) |
82A |
| C4 | 350° K (-40 Mired Shift) | @82C |
|
C8 |
1700° (-80 Mired Shift) |
80C |
| C12 | 2200° (-120 Mired Shift) | @80A |
Specifications
| Exposure loss: | 2/3 Stop |
| Mired Shift | -40 |
| Equivalent Filter | @82C |
| Glass Type: | Hoya Optical |
| Number of Multi-Coatings: | 6 total / 3 each side |
| Hardened Top Layer: | No |
| Anti-Static: | No |
| Frame Construction: | Low Profile / Aluminum |
| Front Filter Threads: | Yes |