I have a used 2x mark I teleconvertor that when put on my 70-200L 2.8 lens the focusing slows to almost not moving at 400mm, but when put at 140mm the focusing goes back to normal. What is going on? Please help.
thanks
tpinchback Senior Member 657 posts Likes: 2 Joined Jan 2004 Location: Houston More info | Nov 27, 2004 16:58 | #1 I have a used 2x mark I teleconvertor that when put on my 70-200L 2.8 lens the focusing slows to almost not moving at 400mm, but when put at 140mm the focusing goes back to normal. What is going on? Please help. 1D MKIII 5D MKII
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defordphoto MKIII Aficionado 9,888 posts Likes: 3 Joined Oct 2002 Location: Pacific Northwest More info | Nov 27, 2004 17:00 | #2 I'll hazard a first guess: Dirty contacts. defordphoto | Celebrating the art of photography®
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Nov 27, 2004 18:12 | #3 I have cleaned the contacts using a pencil eraser and no luck 1D MKIII 5D MKII
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