Lens: Internal cleaning?
/forum/topic/1066989/0



crimpshrine
Registered: Jun 23, 2010
Total Posts: 9
Country: United Kingdom

Hi, i recently purchased an 85mm f1.2 and it has some internal debris. Has anyone tried cleaning internally and if so is there any guides anywhere?

Also does any one know what the cost would be at Canon to do this type of work?

Many thanks.



faremax
Registered: Jun 04, 2010
Total Posts: 571
Country: United States

I used to clean 85L by removing the rear element and that's where all the dust used to collect. I would not touch anything else unless you know what you are doing.



crimpshrine
Registered: Jun 23, 2010
Total Posts: 9
Country: United Kingdom

Thanks, it is the rear element that needs some attention! Do you have any info on this?



faremax
Registered: Jun 04, 2010
Total Posts: 571
Country: United States

Not really. You can't fully remove the rear element because there are wires connecting it to the body. I've used a regular microfiber cloth and it worked perfectly. Just be careful not to scratch it and you should be fine.



AGeoJO
Registered: Jul 08, 2003
Total Posts: 12041
Country: United States

For sure, not for the fainted heart.... .



faremax
Registered: Jun 04, 2010
Total Posts: 571
Country: United States

AGeoJO wrote:
For sure, not for the fainted heart.... .


, for sure.



crimpshrine
Registered: Jun 23, 2010
Total Posts: 9
Country: United Kingdom

...maybe I will just phone Canon!



Ralph Conway
Registered: Jul 31, 2008
Total Posts: 3833
Country: Germany

Let them do it.