Helios BIG grey card with scale 30cm (428330)

Ideal accessory for using on the scene. Can be used as gray card, other side is white. Both sides have cm/inch scale imprinted.
18% reflective card can be ideally used for determining correct exposure and/or white balance either before actual shooting or for post-processing needs.
Dimensions open: 30 × 30 cm, folded 11,5 cm.