A +1 is good for 24-36 inches distance, +2 is good
for 18-24 inches, +3 is good for 12-18 inches, +4 is good for 8-12 inches &
the Macro is good for 4-8 inches.
These are very high quality Brand New lenses. The lens elements are made out of actual glass; not plastic and they are very sharp. This is also known as B30 size. You can select any power you like. They are all same price.
The one that is "flat" is the "Taking" Lens and it goes on the bottom lens of the camera. The "tall" one is the "Viewing" Lens. It is also Parallax Corrected. It goes on the top lens of the camera.
These Close-Up Sets will work with ALL Yashica TLR Cameras that have Bayonet Mount in front of the lens. This includes Yashica Mat, 124, 124G, D, EM, LM, 12, 24, 635 and many other models.
They will also work with ALL Rolleicord TLR cameras that have Bayonet Mount in front of the lens, since ALL Rolleicords have the same Bayonet-I mount
Rolleiflex TLR cameras usually have Bayonet-I, II or III mounts. These Close-Ups will work on all Rolleiflexes that have Bayonet-I mount.
These Close-Ups will also work on Minolta Autocord TLR cameras.