KevinRA

Fully agree :-) and guess what I was trying to say - the downsizing to 22MP of the 5DS actually beating by a slight amount the 5Dmark III shows this nicely on the digital picture + what you see on ...

Never had a 1DX 2 but have experience with the 5D series (classic, 2, 3, SR) and various crops 20D,50D,7D1 and 7D2 - and yes I've usually also had too short lenses to fill the frame on APS-C - ...

I own the 500mm f/4 II and the 1.4 and 2X II extenders and used to own a 7D2 and still own a 100-400 II. I'd personally suggest 5D mark IV and the 1.4X TC with the 500mm I think in your situation. ...

The search tool and google are great in my opinion

No not with the lenses - suspect you will be fine AF'ing on the centre AF point on the 6D1 - as this AF point is excellent. Let us know how you get on with the outer points as they are not cross ...

No AF with the 6D1 unless you have a non reporting or electronically interfered with TC - and even then be careful with exposure and may need to AZ adjust.  (I used to have a kenko 2X DGX with my ...

Brilliant - 4 people is a good number in a landcruiser - I went  there were 6 of us when we went and this was tough at times - fortunately my partner and I worked as a team so it worked quite well ...

I'd not say "much sharper" for a good copy of the 100-400 mark 1 in the centre (mine was pretty good at 400mm f/5.6 and I owned the 400 prime pre it and also the 500 f/4 L). The-Digital-Picture ...

excellent TC the 1.4 Kenko 300 Pro DG. (Kenko slipped up big time with the DGX's though which mess with the communication to the cameras - and then are unusable often when new future canon models ...

struggle - how?  Did you try one? Great stuff and nice lens. Over-sharpened a little for my taste - but matter of opinion. Enjoy :-)

Are you using it with a lens hood? If so try without. I doubt fungus would show like this. Fungus can normally be seen by peering through the lens, caps off,  into but not absolutely direct line ...

Agree - have gone to 5DSR replacing 7D mark II - and buffer can be annoying even with the fastest CF cards - can miss shots which I never used to..... Overall though much prefer the 5DSR inc. for ...

Perfect "lightweight2 combo I'd say..... Fully agree

wow - brilliant stuff.  How close did you get to the bear and where were you - boat or on foot/snowmobile?

Yes - IF - you can fill the frame - e.g. get closer or have a longer lens. No it wont if focal length limited and you have to crop the 6D more than the 80D or similar. For example, the 5DS and 7D ...

It's (100-400 + TC) OK - but f/8 and AF on a 5DSR at least not as good as bare lens and not on same level as 500 4.0 II.  I own the combo and sometimes take out as a light rig. Sometimes I think ...

Based on this suggest APS-C not full frame - if you want less expensive rig and also good for birds/wildlife for the higher pixel density.  (crudely put higher magnification). I still like my 7 D ...

Nice birds :-) Like the whimbrel, we seem in the UK to have a good number of these passing by right now. Just a suggestion - it seems the highlights blown on these? - (e.g. "whites" essentially ...

Very similar if similar pixel density and the same distance away from the bird.  e.g. 7D and 5DS with middle cropped out in same position, same bird almost the same....

Pretty much my experience too - other than for birds, slow moving like some penguins and other black and white birds on land in good light - e.g. where need to preserve whites and get that elusive ...