justinnitsuj

Awesome. Thanks everyone for your helpful replies. :) I think I will keep an eye out for that updated helicoid, not only would it be more convnenient but it doesn't hurt to have a spare. :)

Two are Nikon and two are Zenzanon. I've done some admittedly cursory searching and I couldn't find any info about the Nikon lenses made for the Zenza system or Zenza's branded lenses.

Hi all, So my question is pretty much stated in the title: how do I determine the minimum focusing distance of my lenses? The helicoid has the distance scale for the 75mm lens that comes standard with the camera, but I have purchased a 50mm, a 135mm, and a 150mm. Can I get manuals for these lenses with this info or am I going to have to set up a distance scale and determine them manually? Thanks.

Hi everyone, I recently picked up this lens very cheap because it has some pretty significant fungus inside and I was hoping to disassemble and clean it but the front ring just won't budge. I am using a lens wrench and I have applied considerable force/torque but I have never experienced a lens ring being this stubborn. Does anyone have any suggestions how I might remove this ring? Are their any techniques or lens-safe sprays or oils I could use to help loosen the ring? Like WD-40... but obviously not WD-40. I have included an image of the front ring/element. I appreciate any help anyone can offer.