Gives a blue cast to scenes not in direct sunlight. Has a colour cast, the neutral grey will pick up that cast for example, light from a blue sky If light illuminating the scene (including the reference scale) The 2 cm neutral grey square at the right of the reference scale is intended for Pattern is highly visible and is easily identified by viewers as a reference scale. The checkerboard pattern of 1 cm squares provides informationĪbout a photograph's scale in two dimensions. (Avoid contact cement, I found the toluene solvent caused print dye to bleed.)Ī compact 10cm reference scale with a checkerboard for 2D scale, a circular fiducial mark for perspective measurement, and a grey patch for colour correction that is printable on a photo-printer or as a regular 4"圆" photographic print. I use a thin spread of 5-minute epoxy to mount the scale. Wooden paint stirring stick from hardware stores. I use a 10cm piece cut from an aluminum ruler, and have also mounted scales on a section of a Make your reference scale more durable by mounting it on a piece of old ruler or similar. Pressure-sensitive paper works less well the grey patch often ends up with a half-tone printing 'grain'Īnd paper can yellow with age and sun exposure. Yellowing and fading, has excellent resolution (no visible half-tone dots), and is fairly durable and Photofinishing on photographic paper is a good choice because it has high contrast, resists Click here or on the image below to obtain an image of three reference scales to send to a photofinisher to produce a regular 4" x 6" photographic print, as pictured below (or print on your own photo-printer or printer).Ĭlick on this image for printing instructions
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