Description

W4 color correction filter warms the ambient light entering the lens by 500° kelvin (+40 mired shift) by adding light amber color to the overall exposure. This filter helps fine-tune the color or look of your scene to match your film's white balance or creative vision.

The Hoya W4 filter is helpful when:

• You are using daylight-balanced film and the light source is colder than the desired look and you need a specific amount of color correction to match your film's color balance (5500°K). Great on strong overcast days or when you subject is in the heavy shade.

• When shooting portraits and you want to give the skin tone a sun-kissed warm look.

• You are shooting at sunrise or sunset with daylight-balanced film (5500° K) and you want to a really warm looking scene.

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
W2	200°K (+20 Mired Shift)	81A
W4	500° K (+40 Mired Shift)	81D
W10	1950° (+100 Mired Shift)	@85
W12	2200° (+120 Mired Shift)	@85B

Find Your Filter Size

Specifications

Exposure loss:	2/3 Stop
Mired Shift	+40
Equivalent Filter	81D
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