Disassembly – 7artisans 35mm F1.2 lens [part 2]---by Iurii Zvonar
Today I've disassembled front area of 7artisans 35mm F1.2 lens. It may be useful if you need
to clean front glass elements, repair filterthred or lubricate the helicoid.
Front metal ring with letters can be unscrewed CCW using rubber cylinder for lens disassembly.
It's secured in the thread with three small point of glue, and later I discovered why.
Keep lens fasing up during this process.
Front metal ring with letters can be unscrewed CCW using rubber cylinder for lens disassembly.
It's secured in the thread with three small point of glue, and later I discovered why.
Keep lens fasing up during this process.
Under the ring you will see three small bolts. They are securing front filter threadring.
NOTE: I've turned lens to the side for few shots below, but please don't do it.
Because the front glass element will inexpectedly fall out. That front ring with letters was actually
holding glass on place, that's why 7artisans add glue tothe ring thread.
It’s nice to see that even this first glass element with very thin borders hasdarkened contours.
Next step is to unscrew three bolts and pull out the filter thread ring.
Att his point you can loosen three Torx bolts on the focus ring and also pull it out.
Focus ring has stopping pin right under the "infinity"mark. I like that outer silver he licoid has
machined thread for focus ring bolts, so it sits very secure there.
I've collapsed helicoid to thos how compact is the 7artisans 35mm F1.2 lens inside.
If you look closer on the lens body ring with DOF marking, there is separate thread for focus
ring stopper pin.
Technically that pin can be cut to little extend the minimum focusing distance of the lens.
To my taste focusing on 0.35m distance is close enough, so I'll not do that.
At this point it's easy to remove all the front glass, but I didn't have real need to do that- amount
of micro dust inside of my lens sample is too low.
So I've just assembled the lens back and re-calibrated infinity focus.