Talk:Canon EF 400mm lens

The picture in not of the Image stabilized version of the lens. It is one of the older non-IS lenses... Somebody should fix it.

This article is confusing. The title indicates that it is about all of the Canon 400mm lenses, but in the intro it seems like it is about a specific one of them. The article should either be about all of them or divided into four seperate articles about each lens. —Preceding unsigned comment added by 88.88.187.75 (talk) 18:41, 11 January 2010 (UTC)

Dragonfly Telephoto Array

Uses 400mm f2.8:

https://astronomynow.com/2015/05/26/dragonflys-compound-eye-reveals-very-faint-galaxy-structure/

http://www.astro.caltech.edu/~ycao/B&ETalks/vandokkum_bne.pdf

http://iopscience.iop.org/article/10.1086/674875

©Geni (talk) 17:57, 2 May 2017 (UTC)