Comments on: They Didn’t Know! Do You? If You Own a Super-telephoto Lens, You Must Gotta Read This! https://www.birdsasart-blog.com/baa/2016/09/21/they-didnt-know-do-you-if-you-own-a-super-telephoto-lens-you-must-read-this/ The blog of bird photographer Arthur Morris Tue, 11 Oct 2016 21:48:36 +0000 hourly 1 https://wordpress.org/?v=6.8 By: Jim Simon https://www.birdsasart-blog.com/baa/2016/09/21/they-didnt-know-do-you-if-you-own-a-super-telephoto-lens-you-must-read-this/comment-page-1/#comment-1739229 Tue, 11 Oct 2016 21:48:36 +0000 http://www.birdsasart-blog.com/?p=35911#comment-1739229 I’m unsure of what you mean by the statement concerning orientation of the filter drawer that “With Canon lenses, the letters that spell Canon face the front of the lens.” After reading this blog I inspected my 600mm and did indeed see Canon spelled out on one side of the filter drawer. I had some trouble acquiring focus yesterday and figured I must have inserted the filter incorrectly. I did take the trouble to look up the drop in filter in the Manual. It says on page ENG 18, “The filter holder can be installed facing either forwards or backwards.” I realize you are on an expedition and don’t expect you to get to this for awhile, but I thought you might be interested.
Hope you have a great experience,
P.S. The filter is clean and redoing LensAlign showed no changes, just more erratic 1D MkIV.

]]> By: Quazi Ahmed Hussain https://www.birdsasart-blog.com/baa/2016/09/21/they-didnt-know-do-you-if-you-own-a-super-telephoto-lens-you-must-read-this/comment-page-1/#comment-1738410 Thu, 22 Sep 2016 16:40:47 +0000 http://www.birdsasart-blog.com/?p=35911#comment-1738410 One more thing Guru. We hobbyists attach UV filters in front of our telephoto lenses which act both against haze and as protection.

I came to know about drop-in filters in premium lenses like Canon EF 500mm f/4L IS II USM about a year ago. Wondering what purposes do they serve!

Also what protections are available for the front element of those great lenses!

May I request your advices on the above?

Thank you with regards.

]]>