All gray, target "+" mark and white surfaces of this focus board have their own function. This Focus Board has two sides, one is 18% gray, the other side is white. Front Panel: 18 degree gray, with focus ratio in the middle.
eBay
Grey Card White Balance White Balance Card Set 3 in 1 18% Digital Photography Exposure Color Balance Card Set Gray/White/Black
Aliexpress UK
The grey card can balance all mixed lights to 18% neutral gray. This set of Cards will produce high quality photographs by providing the precise photographic exposure.
eBay
JJC Profession White Balance Cards 18% Gray Grey Card Photography Color Correction Checker Camera Accessory for Canon Pentax
Aliexpress UK
This card is perfect for storing in your wallet or purse and is ideal for when Mid-size card is too large. This card is printed on a 760 Micron waterproof plastic material and features the standard 24 colour swatch on the front and on the reverse, the white, grey and black bands.
eBay
3in1 Pocket-Size Digital White Black Grey Balance Cards Camera Accessory 18% Gray Card with Neck Strap for Digital Photography
Aliexpress UK
TheJJC Gray Card/White Balance Card Set is an essential, portable tool for achieving accurate colour correction and perfect white balance in your photography. Three Essential Cards : Includes black, white, and neutral gray cards, providing a full range of colour correction options.
eBay
Portable Grey Card White Balance Card 18% Exposure Photography Card Custom Calibration Camera Checker Video for Digital DSLR
Aliexpress UK
All gray, target "+" mark and white surfaces of this focus board have their own function. Front Panel: 18 degree gray, with focus ratio in the middle. This Focus Board has two sides, one is 18% gray, the other side is white.
eBay
JJC White Balance Filter 95mm Hand-Held Gray Grey Cards Color Correction Checker for Canon Nikon Camera Photography Accessories
Aliexpress UK
An essential part in digital photography process for photographers or hobbyists. The grey side works for the exposure correction and white side for white balance setting. Wearable and washable, foldable and anti-deformation, Very durable.
eBay
JJC White Balance Card 18% Neutral Grey Card Photography Color Correction Checker Camera Accessory for Canon Nikon Pentax
Aliexpress UK
Using the 24 Swatch Colour Card: The 24 Swatch Colour Card is ideal for white balancing and more detailed colour correcting. Start by composing your photograph including the 24 Swatch Colour Card, make the card part of the composition.
eBay
All gray, target "+" mark and white surfaces of this focus board have their own function. Front Panel: 18 degree gray, with focus ratio in the middle. This Focus Board has two sides, one is 18% gray, the other side is white.
eBay