I have just purchased an old manual Pentax 40-80mm F2.8 lens. It has a macro indicator on it, but I can't seem to be able to figure out how to get it to function. The zoom ring spins from 40-80mm, and stops just before the macro indicator. What do I need to do to get the lens in "macro mode"?
Thanks for any help you can give me, Eric.

[Adam]

You may have to turn the focusing ring all the way to minimum focus before the zoom ring will let you proceed to the macro range. Experiment a bit and you should get it.

[pepperberry farm]

As Adam pointed out above, the lense may only go into macro mode at 40mm... It is this way on my SMC A 70-210mm... but on the 35-105mm, the macro mode is available throughout the focal range....

[boriscleto]

On the 40-80 you have to turn the zoom ring past 80. It doesn't matter where the focus ring is. There is some resistance but it should click past 80.

[pepperberry farm]

ah - so it is the complete opposite; the macro is at the far end of the range....

[repaap]

Just to make it clear, as I just tried it. Focus at closest point 1.2 meters. Then turn zoomring past 80 mm. It should 'click' and then focus by pushing/pulling focus ring. You can fine focus by turning that ring.