Compact digital refractometer: Abbemat | Anton Paar
Wallpaper : nature, reflection, green, castle, pattern, wildlife, duck, pond, Denmark, mallard, leaf, slott, danmark, f gel, exif model canoneos760d, camera make canon, camera model canoneos760d, geolocation, exif lens efs18200mmf3556is, exif aperture
Nikon D3100,D3200, D3300,D5100,D5200,D5300,D7000,D7100 group | Flickr