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crwdns2892124:0crwdnd2892124:0Canon PowerShot SX200 IS Lens Disassemblycrwdnd2892124:0crwdne2892124:0

crwdns2892146:0Philip Le Richecrwdnd2892146:0crwdne2892146:0

crwdns2875918:0crwdne2875918:0 crwdns2892120:0crwdne2892120:0 Philip Le Riche

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Thing
Zoom lens assembly
Introduction
This guide is directly applicable only to this one specific model, nevertheless, other Canon compact camera lenses are likely to follow similar principles of operation and methods of construction. Bear in mind, though, that the correct orientation of components is essential for reassembly. This is very easy to loose track of, which will result in much wasted time in trial and error.
Disassembly and reassembly of this lens is not difficult so much as requiring a fair amount of patience.
Note that "left", "right", "clockwise" and "anticlockwise" in this guide are always as seen from the photographer's point of view behind the lens, unless specifically stated otherwise.
Note that it is very easy to get fingermarks or dust on the optical components but much harder to completely remove them. Particularly on the focussing lens and the image sensor, any contamination will have a significant or major effect on image quality.
You will require a fair amount of patience as reassembly is a little tricky. Note that it is very easy to get fingermarks or dust on the optical components but much harder to completely remove them. Particularly on the focussing lens and the image sensor, any contamination will have a significant or major effect on image quality.
Note also that "left", "right", "clockwise" and "anticlockwise" in this guide are always as seen from the photographer's point of view behind the lens, unless specifically stated otherwise. Bear in mind that the correct orientation of components is essential for reassembly. This is very easy to loose track of, which will result in much wasted time in trial and error.
You will need small cross-head and flat screwdrivers and a small craft knife. Additionally, a pair of fine tweezers will be helpful, and cocktail sticks are useful for releasing ribbon cables from their sockets. If you need to clean the optical components you will need some isopropyl alcohol and non-linting cotton swabs or lint-free cloths. Unless your eyes can focus at distances less than 10cm a magnifying glass or jeweller's eye loupe will be very helpful.
On reassembly, the plastic gears, guides, guide grooves and sliding surfaces may be lubricated if necessary with a smear of silicone grease, but take care not to get any on the contacts of any of the ribbons.
This guide is directly applicable only to this one specific model, nevertheless, other Canon compact camera lenses follow similar principles of operation and methods of construction. Disassembly of a Canon A3150IS lens has confirmed this. In that case the main differences were that (a) it's significantly smaller, and (b) the image stabilisation ribbon (Step 9) is non-detachable. Both these factors make it more difficult, and in the case of that particular lens a very thin and narrow section of plastic in the second lens carrier was broken, a problem that a larger lens would be less susceptible to.
Further background information on a similar Canon lens is given in the CHDK Forum at http://chdk.setepontos.com/index.php?topic=8801.0