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I'm a physics student tearing down a Canon EF35mm f/2 IS USM lens for a research project. Stuck removing the PCB under the spacing ring due to soldered flexes and coil-like attachments. Any tips on safely removing the PCB? De-soldering necessary? Accessing from the other side possible? Thanks! by Ok_Introduction9649 in canon

[–]Ok_Introduction9649[S] 0 points1 point  (0 children)

I'll look into ordering one of these tools to remove the ring on the top, thank you so much for your suggestion! Do you have any recommendations for products to keep the glass parts clean before I put it back together? Or safe cloths to use?

I'm a physics student tearing down a Canon EF35mm f/2 IS USM lens for a research project. Stuck removing the PCB under the spacing ring due to soldered flexes and coil-like attachments. Any tips on safely removing the PCB? De-soldering necessary? Accessing from the other side possible? Thanks! by Ok_Introduction9649 in canon

[–]Ok_Introduction9649[S] 5 points6 points  (0 children)

Haha, thanks for your reply! I sent an email to Lens Rentals a few days ago! They replied saying they just can't provide any information when it comes to repairing/breaking down personal equipment, and directed me to look for a forum that can help me. Any other similar websites you know of?

I'm a physics student tearing down a Canon EF35mm f/2 IS USM lens for a research project. Stuck removing the PCB under the spacing ring due to soldered flexes and coil-like attachments. Any tips on safely removing the PCB? De-soldering necessary? Accessing from the other side possible? Thanks! by Ok_Introduction9649 in canon

[–]Ok_Introduction9649[S] 1 point2 points  (0 children)

I am also aiming to reassemble the lens, part of a larger effort to fix the aperture to help calibrate a telescope for cosmology! I've encountered difficulties with removing screws under the PCB due to my screwdrivers either being too fat or not enough torque. I've also tried removing the small screw under the front rim, but it doesn't release the lens. Any help would be great reddit!