Rain Cover for 400 500 600 or 800s

Picture is worth a 1,000 words.

7D MK2. TC 2X.  500 f4 II.  Lens hood attached in extended position.  Storm Jacket XXL.  Plenty of material left on camera end.  (Photo taken with iPhone 5)

Rain drops bead up on Storm Jacket XXL model. (Photo taken with iPhone 5.)

Take out and unfold Storm Jacket from compact pouch hanging on tripod.
Pull Storm Jacket over lens hood first.
Roll back toward camera.
Take lens off tripod to pull SJ over lens foot (Velcro opening at lens foot area).
Place lens back on tripod.
Operation takes maybe 30 seconds or less.
After use, folds easy and place back in pouch and dry later or dry first.

PS.  Can adjust focus ring or lens foot knob to rotate lens by placing hand on SJ from outside.