12-08-2018 11:38 AM
Recently purchased a used ef 400l f/2.8 IS USM. Just got it yesterday, haven't used it yet. When I was inspecting it I noticed there was a slight booger of some sort on the drop in filter holder, towards the top off to the left side. Did the obvious, tried to clean it with 0 luck. Just wondering if the filter holder from a second generation lens will work?
04/16/2024: New firmware updates are available.
RF100-300mm F2.8 L IS USM - Version 1.0.6
RF400mm F2.8 L IS USM - Version 1.0.6
RF600mm F4 L IS USM - Version 1.0.6
RF800mm F5.6 L IS USM - Version 1.0.4
RF1200mm F8 L IS USM - Version 1.0.4
03/26/2024: New firmware updates are available.
EOS 1DX Mark III - Version 1.9.0
12/05/2023: New firmware updates are available.
EOS R6 Mark II - Version 1.3.0
07/31/2023: New firmware updates are available.
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