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Inon announces variable color correction filter

Inon has announced a new filter system that allows the user to adjust its strength underwater. The UW Variable Red Filter has an M67 mounting thread and is designed to correct the blue color cast in blue water. It operates with two coloured circular polarising filters that can be rotated to adjust their intensity.

The UW Variable Red Filter M67 is available now. Please consult you local Inon dealer for prices

Press release

UW Variable Red Filter M67

INON INC. is pleased to announce UW Variable Red Filter M67 which provides seamless filter strength adjustment to accommodate with different depth to avoid underwater blue cast on August 9th, 2017. * UW Variable Red Filter M67 (1)
—Release date: August 9th, 2017
—JAN code: 456212143 842 2

UW Variable Red Filter M67 Features

Left: UW Variable Red Filter M67 with maximum filter strength setting. Center: UW Variable Red Filter M67 with middle filter strength setting. Right: UW Variable Red Filter M67 with minimum filter strength setting.

Sample clip Adjusting filter strength of the UW Variable Red Filter M67

Side view of the UW Variable Red Filter M67 Left: Two filters are combined. Right: Two filers are separated

UW Variable Red Filter M67

Outer diameter/length: φ83.6mm (3.3in.) x 20mm (0.8in.) Weight: Air/Underwater: 77.6g (2.7oz) /Approx. 40g (1.4oz)
Body material/finishing: Polarizing glass/Corrosion-resistant aluminum alloy/PC

(1) Patent pending in Japan.
(2) When using this product with stronger filter effect reducing blue/green wavelength significantly and using external strobe/light will have reddish results. If you shoot with an external lighting device, set minimum filter strength or remove this product from your camera system.
(3) Depending on combined camera/housing, an image may have vignetting. If this happens, zoom in until no vignetting is observed

Set-up Example

* Olympus TG-5 + Olympus PT-058
* UW Variable Red Filter M67
* Step-up Ring 52-67

* Sony DSC-RX100M5 + Sony MPK-URX100A
* UW Variable Red Filter M67
* LF1300-EWf (upcoming product)
* Single Light Holder LF
* Shoe Base

Sample images

Subject: School of peach fairy basslets
Equipment: Sony RX100M5/MPK-URX100A
Photo data: Program Auto, WB Auto
* Without filter (Left) F4.0, 1/125, ISO125, at depth 2.5m
* With UW Variable Red Filter M67 (Right) F3.5, 1/80, ISO125, at depth 2.5m
Photo by: Korechika Yano (DIVE SERVICE YANO)

Subject: School of blue green damselfish
Equipment: Sony RX100M5/MPK-URX100A
Photo data: Program Auto, WB Auto
* Without filter (Left) F4.0, 1/320, ISO125, at depth 6m
* With UW Variable Red Filter M67 (Right) F2.8, 1/60, ISO125, at depth 6m
Photo by: Korechika Yano (DIVE SERVICE YANO)

Sample movie