[Rolnslo]

I picked up a Vivitar 100-300mm 1:5 Close Focusing Auto Zoom (Serial 37722561) as part of a Pentax ME Super purchase recently. The aperture has issues and won't stay open regardless of what the setting is. Since this was just thrown in with the rest of the stuff I bought and was an unintended purchase, I figured that I'd try to fix it.

So, does anyone happen to have or know where to locate the service manual for this lens?

Any help would be appreciated.

Thanks.