Royal Auto Tele Converter 2x for Pentax K mercury you may need to meter

you may need to meter stopped-down on this one

or R mount: it is for the short-lived series of EX cameras

add the Flic Film Cyanotype Bleach (sold separately) to prepare your Cyanotype for toning with tea

except for- and I am going to take a few breaths to try to calm down before I continue this description- an ID number engraved on the side of the viewfinder

This professional telephoto zoom lens features premium ED optics

Royal Auto Tele Converter 2x for Pentax K mercury you may need to meterThe Royal Auto Tele Converter 2x is a little teleconverter for Pentax K mount lenses and cameras. Nothing fancy, just doubles your focal length at the cost of a few meagre stops of light.