While at a thrift shop, I came across an old Olympus PEN FT with a 20mm f3.5 lens attached. Although I had hopes of shooting film on using this camera and lens, it turns out that not only was my desire to shoot on film minimal, but the attached lens had some fungus between some of the elements.

Given that the lens itself isn't very expensive and that I had a not-insignificant desire to see how well this lens performs when paired with a modern Olympus E-P1, I decided to take a small risk and take the lens apart.

This lens is not terribly complicated, but with any operation like this, I recommend taking detailed notes.

Warning: I really have no idea what I'm doing here -- although this turns out successfully for me, you should follow these instructions at your own risk.  Please do not do this with any lens you consider valuable -- it is quite easy for you to permanently damage your lens.

Step 1: Disassembling From the Back of the Lens

If you look at the back of your lens, you'll find two screws; unscrewing them will allow you to remove the rear panel of the lens. 
Very impressed. You work cleanly and neatly. Well organized. Thank you for your lessons.
Good work, thanks for sharing.

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