Most likely, they are.
Krauss GA Rollette luxury camera w/ Rollar-Anastigmat 4.5/8.6cm
HETHLIF Auxiliary Objective Lens 1X Stereo Microscope Lens Standard Interface Auxiliary Oil Proof for Stereo Microscopes Camera
Soviet USSR FED STEREO 35mm Camera Stereo Camera, IN CASE MINT!
EKA Krauss Paris Rare France Camera 35mm Film Camera 30x44mm Exposures c.1924
Krauss G.A. Rollette Luxury camera w/ Rollar Anastigmat 4.5/8.6cm
FotoZ 49MM 0.75x HD Wide Lens(W/Macro), for Canon EOS M6 M50 Mark II M100 M200 on EF-M 15-45mm and R50 R100 on RF-S 18-45mm. Latest update: Compatible with Ricoh GR4 via adaptor GA-3.
