@T-Cup314

Brilliant, thank you good sir !

@nunopluis

More videos like these please !
Spotting sessions vlogs would be lovely as well !

@aspotterabroad4145

Great video, thanks for making it. Great content overall, love your Chanel, keep
It up !

@davidct2406

Super sharp images that I’m sure anyone would be pleased with.

@GeoffMoorePhotography

Interesting video Stuart and welcome to the 300mm 2.8 X2 Teleconverter club. :) I have to echo your thoughts/findings, I too see little to no image degradation or performance impact when pairing the aformeions lens with the canon x1.4 & x2 mark3 teleconverters. I also used to have the 400mm 5.6 but my copy was for whatever reason never that stellar, but i do miss the weight advantage it brought to the kt bag. alas your video has now  got me romatasicing about getting another copy.

@NikCan66

Excellent advice

@Terrytheartist

I’ve really enjoyed watching some of your back catalogue of aviation videos Stuart, great footage and photos, I’m an aviation and wildlife photographer and I use the Canon r5 and r10 with the rf100-500mm and rf100-400mm lens, I also use a 1.4 tc the majority of the time which I find has very little negative impact on the image quality, if it did then it’s easily rectified in one of the many editing tools out there! Look forward to your next outing 👍📷✈️ cheers Terry

@pepper1046

canon 200-400 f4 L 1.4ex, my holy grail.  Love it.  super sharp and versatile

@sorggalder

Thank you for this informative video.  I've been highly considering that Canon 400mm prime lens.  I currently shoot with the 100-400mm mk  ii lens.

@philbaker3540

i have recently changed to a 400mm canon difracted optics and paired with canon r6 mk2 your photos are great

@PhotoTrekr

When I shot Canon cameras and lenses, I loved the 400 f5.6.  Great travel lens for wildlife.  I also had the 300mm L kens which produced excellent photos even with the 1.4x teleconverter.  But, it was very heavy and I stopped traveling with it.

@kenfrank2730

I currently own the Canon EF 300 f2.8 IS II lens that I use with the 1.4x III. This combo gives me outstanding aviation image quality at 420mm (I was not satisfied using the 2x III) But, I have found a lens that's even better. It's the RF 100-500mm f4.5-7.1 It may be hard to believe, but in good light I can't see any IQ difference between these two lenses, even when shooting at 500mm. The 100-500 is that good! The 100-500 gives zoom function and weights only 3 lbs. The lens and R5 make a perfect air show combo. I like the 100-500 so much that I may sell my 300 f2.8 II.

@mtippett80

great video!!! am just starting out and have a Canon 75-300mm ... should I bother with a 2x extender or just stick with the 300mm?

@pauljohnson2461

Another good video. I also use a 7D Mk II, I have a 7D mkI spare body, both come with 1.6x built in extenders.
Lens wise I used to have a Sigma 150-600 Sport but  was very disappointed with performance at the top end. So last year I chopped it in, for a second hand Canon ef 100-400 f4.5-5.6  Mki IS USM  - with the 7D crop sensor gives me a 160-640 lens.
Following your set up suggestions for 7D mKii, I would say my keep rate has increased, but not as much as I had hoped, especially after last weekend outing to RIAT 23. I haven't got too many due to rain and poor light. 
I have been thinking of trying an upgrade to an ef 100-400 Mkii.
So what really interests me about your Vlog is the suggested sweet spots at 400 mm and 600mm. 
I have pretty much used the top end of the lens 400 (1.6 =640) , so to improve f stops and potentially sharpness, should I instead perhaps be using 375mm (x1.6 = 600) and 250mm (x1.6 = 400).

I would also be interested in your view of whether to save up for a 100-400 mkII, or perhaps going down the f.2.8 70-200 mk II and x2 extender route, although am attracted to low light possibilities with f2.8 lens.
I shoot mainly aviation and wildlife (birds of prey), although should do more landscapes 
Paul

@mvp_kryptonite

6:15 don’t, I let my mint copy go as I didn’t use it really. Also I couldn’t get on with the 70-300L as it was so chubby lol. Thanks for your views!

Another undercover lens is the 400/5.6L smaller brother, the 300/4 IS L. Same inbuilt hood but with image stabilisation.

How do you find hand holding the 300/2:8 with the 2x?

@mortenthorpe

i photograph birds and such - pretty much the same requirements- the fuji 150-600 is great for this, or the 100-400, and the 50-140 is amazing

for super small depth of field, and great optics, the Fuji 200 mm f2 is really something to behold! it is, however, exceedingly expensive!

@dmjohn65

Nice vid with a lot of useful information. I'm thinking about a used 400mm f2.8 paired with my 7Dmk2. It's got a built in 1.6x Teleconverter.

@richardbrown3434

Really interesting video Stuart. Lots of good advice. I’ve only recently got into aviation photography and hopefully in the next couple of years will upgrade to some better lenses.

@theo-lw5tb

off to the mach loop in 3 weeks. In your opinion should i get the 70-200 with a 2x extender instead of a 100-400 mk ii

@paulradford6902

Hi Stuart, just found your channel as I have a 7d mark ii coming tomorrow. I already have a 70-200 F4 L non IS. Would I lose anything by pairing a 2x extender with it?