Wray London 5.5" f5.6 for 4x5 accessory but it probably isn't

but it probably isn't

This Leitz Red filter (AKA 13190) is threaded for E41

This premium Novoflex adapter lets you use Canon FD mount lenses on your Fuji X-mount mirrorless camera

Carl Zeiss Vario-Tessar FE 24-70mm f4 ZA OSS lens for the Sony E mount

but the marks kind of look like specks of dust through the viewfinder when in use

Wray London 5.5" f5.6 for 4x5 accessory but it probably isn'tThis brass Wray London lens is designed to cover 4x5, despite its tiny size: it's less than 4cm long. It's a 5. 5" lens (about 140mm) and has an almost perfectly circular diaphragm with apertures down to f64. Barrel has some tarnishing and surface wear, aperture control is a bit tight towards the smaller apertures, but the optics are quite clean. Includes a threaded mounting flange.