I had fun shooting two of these birds this morning.
The one where its scratching its neck does not show dust on my lens or sensor its the minute bits of feather flying as it furiously scratches away

Enjoying an early morning scratch

(Download)

Its good to have a yawn in the morning

(Download)

Contented and resting

(Download)

Thanks. I thinks its better than my 5DMkiii. I am more than happy and now using auto ISO more often.

Thanks Joe. I am basically through testing now and into it. Extremely pleased with the moving focus speed, I just have to remember to set the correct distance of the three on the lens switch. All good fun.

Thank you for the feedback. I am putting another three poses up shortly of the other bird that was there.

I had the camera set for BIF shots when these guys came along and did not change the settings.

I took this shot this morning. The first 2 are cropped from the complete shot shown in picture three.
These heads have been processed identically except for No 1 which has Topaz light noise reduction applied. You are welcome to form your own opinion on how the new camera is on noise. The setting was ISO6400 2000sec f9
The full bird had more processing and I upped Topaz noise reduction to moderate and took out that annoying branch running into the head.

With noise reduction

(Download)

No noise reduction

(Download)

Mr Magnificent him or her self

(Download)

A put up a post requesting help with my 400mm 2.8 lens with 2 X convertor detaching from my 7D Mkii with the strap set up I was using. I got real help from the hog subscribers which I am very grateful for. Following these suggestions I have now set up a new strap rig to carry this setup. I even stretched the friendship further and attached my monopod with Gimbal head to the tripod mount on the lens. When I was walking ready to shoot I had the monopod stretched out to the length I needed. I could just swing it round into position and fire away. It just trailed in behind so it didn’t hinder me when walking. I have connected some very strong key rings to each lug of the lens. Onto this I clip a double harness with only one side being attached and a normal shoulder strap which is then attached to the other side. I set it so that the weight is equally distributed to both my shoulders. Thanks to everyone who contributed. You can see the set up in the photos.

The harness and strap set up


The rings on the lens lugs


Yours truly Ready for action

Thanks I agree with you, I am going to use the lugs from now on.

Thanks Capn Dave and everyone who has responded to my question. Using a magnifying glass I carefully checked the interfaces on both of my cameras plus the Convertor. There appeared to be no damage at all, everything was fine. I attached just the convertor to my camera and there was no way I could budge it. It was rigidly locked on.
My conclusion after the input you have all offered is that something, be it straps or whatever have pushed on the release button. Because I had 2 straps attached there may have been a twisting force created between them that rotated the lens and detached it from the camera. I am going to make up a rig like Gary Truchelut said he is using (thanks Gary) and that way all the weight will be taken on each side of the lens without any attachment to the camera.
Thanks again everyone.

Just needs a minor tweak cannoneer35 its Kookaburra

Thanks Joe I downloaded and was able to access the data. I noticed that they also have a program to get shutter count so I am going to download that program now. I rang Canon Australia a while ago to ask how i could read this from my cameras and their answer was to post them to their service department In Melbourne to have them read it. That's a lot of help when I live in Sydney. Thanks again

yes its a Canon

yes its a Canon.

Thanks Gary. Is your set up commercially available or did you make it yourself please? cheers

Hi Leitz. Its the real deal a Canon original. I use the 2 straps as it balances the camera in a horizontal position when i am walking with it. I deliberately have the Lens strap taking most of the weight to avoid tension on the camera body. It works really well for me and gives my arms a breather when I am not shooting. Thanks for your thoughts.