Olympus OM Auto Bellows brand_Tamrac Don't worry though because Nikon

Don't worry though because Nikon will sell you the AH-2

for a total capacity of about 120 slides

It can't be that all the time

The Pentax KM is a slightly fancier K1000

and 200mm lenses (check your lens instruction manual for compatibility)

Olympus OM Auto Bellows brand_Tamrac Don't worry though because NikonThis Olympus Auto Bellows is a sturdy macro bellows with a built in focusing rail for OM lenses and bodies. In excellent cosmetic condition, with only light finish wear. Bellows are intact. The lever actuated "auto diaphragm" stopdown is a touch sluggish to return, but it gets there eventually, and there's no effect on manual mode in any event. Includes original box.