Comments on: The EF 300mm f2.8L IS II: How Sharp is Sharp? Part VI of a Series https://www.birdsasart-blog.com/baa/2014/09/14/the-ef-300mm-f2-8l-is-ii-how-sharp-is-sharp-part-vi-of-a-series/ The blog of bird photographer Arthur Morris Sat, 20 Sep 2014 13:50:48 +0000 hourly 1 https://wordpress.org/?v=6.8 By: Arthur Morris/BIRDS AS ART https://www.birdsasart-blog.com/baa/2014/09/14/the-ef-300mm-f2-8l-is-ii-how-sharp-is-sharp-part-vi-of-a-series/comment-page-1/#comment-1567272 Sat, 20 Sep 2014 13:50:48 +0000 http://www.birdsasart-blog.com/?p=22641#comment-1567272 In reply to Quazi Ahmed Hussain.

They should b expected to remain sharp forever. You might need to micro-adjust it or send it back to Canon along with your favored camera body. artie

]]> By: Quazi Ahmed Hussain https://www.birdsasart-blog.com/baa/2014/09/14/the-ef-300mm-f2-8l-is-ii-how-sharp-is-sharp-part-vi-of-a-series/comment-page-1/#comment-1567267 Sat, 20 Sep 2014 13:25:46 +0000 http://www.birdsasart-blog.com/?p=22641#comment-1567267 Dear Artie,

Greetings.

May I know how long Canon prosumer L lenses can be expected to remain sharp? My 5 yr old EF 400mm f/5.6L USM seems to be producing little softer images of late.

Thanks in advance.

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