Foto

How to Disassemble the Canon EF 50mm f/1.8 II Lens
Yosuke Bando

Preface
• This instruction is intended to be helpful to those who are going to make some modifications to the camera lens toexplore/reproduce coded aperture, color-filtered aperture, and other related techniques for research purposes. • But we disclaim any responsibilities for the consequences of your following thisinstruction, so do it at your own risk!
– For example,
• • • • • The lens may get broken Some parts of the lens may be lost You may not be able to reassemble the lens The reassembled lens may not work You mayget hurt

Why Canon EF 50mm f/1.8 II?
• Cheap compared to other camera lenses
– Wouldn’t be a big blow even if you broke it by mistake

• Easy to disassemble
– Simple structure with a smallnumber of parts – Made of plastic, not metal

Preparation
• Sufficiently large working space
– Make an open space on your desk – Do not work in a clutter

• Time
– A few hours should besufficient

• Tools
– Cross slot (‘+’) micro-screwdriver – Flat metallic bar
• Straight slot (‘–’) screwdriver can be used

• Container for detached parts
– Small screws can be easily lost

• Clothfor wiping the lens glass

Start Disassembly
• Remove the back cover

Remove the Screws
• Two micro-screws can be found • Remove them

Remove the Inner Cover 1/2
• Push down the metallicterminal part and drop it into the inside
– You can make a room for it by moving the inner tube downward

Remove the Inner Cover 2/2
• Insert a bar into where the terminal part was and take offthe cover
– Caution!! See the next slide

Caution
• Be careful not to damage the cable, the board, and the lens glass

Remove the Side Cover 1/2
• You can see a seam from the outside • Pushfrom the inside with a bar
– Push these two points outward

Remove the Side Cover 2/2
• The cover is glued by a piece of double-faced tape, so unglue it by force • First push it from the inside,...