SMC Pentax 135mm f3.5 brand_Visibledust 5 lens may be used

5 lens may be used both above and below water

producing 16 horizontal-format exposures

So you will probably not want to use this lens if speed of operation and sheer optical quality are your #1 concern… but it’s still kind of neat

so we're talking about a camera that's at least a hundred years old at this point

and imaging is excellent

SMC Pentax 135mm f3.5 brand_Visibledust 5 lens may be usedThe SMC Pentax 135mm f3. 5 lens is a short telephoto lens for Pentax K mount SLR cameras. In very good condition, with light cosmetic paint wear, minor internal dust, good function. This first series of Pentax K mount lenses is larger and more heavily built than the later Pentax M lenses.