Jim They made 2 auto-ups, both fit the 90mm lens only, they are #1 and #2, imagine that! They are odd looking filters with windows attached (similar to some early leica close-up lenses) to magnify the rangefinder. I have the #2, it will focus to about 16 in., they are somewhat hard to find and ussually cost about 50.00. Hope this helps. Rick Indy