Canon 5D Mk 4 Auto Focus Performance

Canon 5D Mk 4 Auto Focus

2ppi 400x400 Canon 5D Mk 4 Auto Focus PerformanceLike Nikon, Canon never do me any favors!

But I do feel that I must say to the world that it ought to give this camera a bit of a break.  It’s had a good mauling in a lot of places, usually by idiots and no-nothings, who keep comparing it to its big brother the 1DX Mk2 – a camera not without its very own set of unique foibles!

The Canon 5D Mk 4 is NOT designed to be a “poor mans” 1DX Mk2.

It’s hardly what I’d call ‘cheap’ in the old purchase price department for starters, so ‘poor mans’ and ‘budget’ are not terms I can easily associate with it.

There are lot’s of things I need to delve into further on this camera to give you guys a fuller picture of the cameras overall performance – most of which is going to involve Calumet or Canon lending me more lenses.

But I can say that I’ve formulated a solid opinion on the Canon 5D Mk 4 Auto Focus performance, and it’s turned out to be a lot better than I’d first imagined.

These are the style of shot that really tells you if your auto focus is working and up to the job:

1D9A3561 600x400 Canon 5D Mk 4 Auto Focus Performance

“Joey” 1/3200th, f7.1, ISO5000

1D9A3410 600x400 Canon 5D Mk 4 Auto Focus Performance

“Joey” 1/3200th, f7.1, ISO5000

1D9A3454 600x383 Canon 5D Mk 4 Auto Focus Performance

“Joey” 1/3200th, f7.1, ISO4000

But before you can start producing the shots you have to go through the tedious bit of testing the AF first.  It was while testing the overall sharpness and accuracy of the AF system that I came across a little problem.

When photographing the old ‘brick wall’ static target I found the system was front focusing by around 40 centimeters at 30 meters.  If I added +4 on the AF micro adjustment (using the 500mm don’t forget) then everything was razor sharp.

This didn’t seem right in my eyes – I’ve never felt the need to use micro adjust on Canon gear to achieve sharp focus on a static target – perhaps I’ve just been lucky!

But after testing this body with another 500mm L IS II, and Calumets lens on 3 other bodies, all tests revealed the same necessary +4 adjustment.

MG 0202 Edit Canon 5D Mk 4 Auto Focus Performance

The difference is quite marked!

  • Bare in mind that all these ‘static tests’ MUST be done with the aperture WIDE OPEN (in this case f4).
  • I always use the high ISO capabilities of a camera to the maximum, which allows me the luxury of shooting at between f6 and f8 to maximise DoF and use a high enough shutter speed to stop the action.  Manual exposure with Auto-ISO is my usual method of shooting with long glass.  A noisy image that is razor-sharp will ALWAYS out-sell a low noise image full of motion blur!
  • At f8 hardly any of the ‘poor sharpness’ (above left) is visible in the image because DoF is doubled from 40cms to over 80cms behind the plane of focus at this distance.
  • If I was to swap out to a shorter lens then the required amount of micro adjustment would be less, and with a longer lens MORE!

However, when we come to photograph the likes of ‘Joey’ we have a BIG problem!

Adding positive micro-adjustment values is basically like adding BACK FOCUS – you are telling the system to focus BEHIND where it perceives sharp focus to be – in other words ‘focus further away’.

So with a head on closing target/subject the resulting AI Servo sequence of frames will all be back focused.  The camera will be focusing behind a subject that’s getting closer – it’ll never work!

What we need is the system to move the plane of focus AHEAD of the subject, so that when the shutter opens for the next frame, the subject and plane of focus are hopefully in the same place.  This is how PREDICTIVE AF works, and cameras like the 1DX Mks 1 & 2/Nikon D4/4S truly excel at it.

Dialing in an opposite value of -4, and using AF Case 4 settings with Zone AF for the AI Servo sequences of little Joey yielded good results, but the level of consistency was still below what I thought was possible.

And it certainly got even less consistent when I changed to Point Expansion or Point Surround AF modes.

But now I’ve settled on a custom setup that is NOT obtainable on any of the fixed AF cases; TS & ADT both at +2 together with -3 AF micro adjustment:

1D9A4149 Canon 5D Mk 4 Auto Focus Performance

‘Morgan’ 1/4000th f8 ISO4000 & -3 AF micro adjustment

I’ve just uploaded a new video to my YouTube channel where I discuss the performance of the Canon 5D Mk 4 Auto Focus system, and go through A LOT of full resolution images.

Note, some of you may get bored and think I examine too many images – shame on you! There are 4 sequences, and each one represents around 4 seconds in real time and are a ‘buffers worth’ of shots.  So all those boring shots took less than 20 seconds to acquire –  I have to show all the shots in a sequence to illustrate the level of consistency, and I show 4 sequences to prove none of them are a fluke – I DO THE JOB RIGHT – unlike some other reviewers!

You can view it at full size by clicking the YouTube icon bottom right once you press ‘play’, but be warned it’s 36 minutes long!

I’m not finished with this camera just yet I don’t think; I must admit that I do quite like it!

Is the Canon 5D Mk 4 Auto Focus capable of better performance than that of the venerable old 5D Mk3 ?  Yes, it is.

Is the image quality better than the 5D Mk3 – oh you betcha it is, by a country mile and just like the 1DX Mk2 advantage over the 1DX.

Are the G/T algorithms (ISO), sensor and ADC output better – from what I can see that’s a ‘yes’ too; but then I’ve not done any dynamic range testing yet – kinda hard when the only lens you’ve got is a 500mm!

I’m getting used to the ‘touchy-feely’ screen now, but the fixed 7fps HS frame rate pisses me off a bit, I’d like to be able to drop it to 6 or 5 to the AF system even further.

Take my advice and don’t be impressed with the ‘Duel Pixel Raw’ feature – it’s CRAP. It does absolutely bugger-all apart from slow the camera down and produce massive files that are not worth the time or effort.  And you can only ‘work’ them in that clunky DPP software which is a total abomination to try and use!

And old UHS1 SD card tech? The camera would be better with a CF slot in conjunction with a CFast2 slot ‘a la’ 1DX Mk2 – in my opinion of course.

1D9A4186 600x400 Canon 5D Mk 4 Auto Focus Performance

Great Tit. Canon 5DMkIV, Canon 500mm f4 L IS II, ISO 10,000 +4 AF Micro adjustment

logo simple Canon 5D Mk 4 Auto Focus Performance

Canon 5D Mk 4 from £115.96 per month – Click HERE

Canon 5D Mk 4 – First Thoughts

The Canon 5D Mk 4

Looking at the Canon 5D Mk 4 for Wildlife & Bird Flight Photography.

Part 1 – First Thoughts.

2ppi Canon 5D Mk 4   First Thoughts

The other day Calumet asked if I wanted to test the new Canon 5D Mk 4.  I’d just done an autofocus workshop in Birmingham and had been asked about this camera, so I thought it would be a good idea to take up the offer.

I’ve deliberately stayed well clear of any reviews of this camera while waiting for its delivery – don’t want to unbox it with any preconceived ideas do we??!!

I picked the camera up yesterday from Calumet Manchester, replete with the stunning 500mm f4 LIS Mk 2 lens – “Leanne, where’s the other two spare batteries you promised you’d ordered for me?”

The only Canon DSLRs I’ve used over the past couple of years are the 1DX marks 1 & 2, with the occasional ‘smattering’ of 5DMk3 when I’ve been out with clients – so this new offering from Canon has something of a ‘clean slate’ to start with in my eyes.

So it’s a bit of a shame it got off to a bad start when I pulled it out of its case last night and found that Canon STILL haven’t added a viewfinder blind – a major fault with the 5DMk3 in my opinion.

D4D7453 Edit Canon 5D Mk 4   First ThoughtsWhat the heck are they thinking?

D4D7456 Edit Canon 5D Mk 4   First ThoughtsThis camera is no 1DX Mk 2, and it’ll be bought by folk who want to shoot landscapes, seascapes, wide-field astro, a bit of studio work perhaps – it won’t be bought by folk like me who shoot big hairy-arsed beasties in zero light at ISO-stupid; yet the 1DX has one!

Come on Canon – think about the little things chaps.

Anyway, here’s the rig Calumet have supplied to me, just to see how far we can penetrate the domain of the 1DX Mk2/Nikon D5…

D4D7448 Canon 5D Mk 4   First ThoughtsAll those stupid straps can bugger off for starters – Jesus, they are a recipe for disaster.  But WAIT – if I take the camera strap off I’ve not got my stupid rubber flappy thingy viewfinder blind….

Now imagine I’m using this Canon 5D Mk 4 camera with a wide-angle lens shooting a low light seascape with a 10 stop ND and a 2 minute exposure.  That strap flapping in the wind and rattling on the tripod legs isn’t going to do much for image sharpness is it…it’s pathetic.

As a Nikon shooter the lack of a proper blind irks the heck out of me, but we’ll put it aside as I’m sure older 5D users are well used to the problem by now.

So moving on…

My two main interests in the Canon 5D Mk 4 are autofocus performance first, and ISO/low light performance a close second – being good at both is a prerequisite for wildlife photography, and in my mind this 5D Mk 4 is pitching its tent on the lawn belonging to the Nikon D810, so there’s a benchmark for it!

Setting the Canon 5D Mk 4 to my normal ‘Canon settings’ I nearly came a cropper before I started!

Not being used to the, shall we say ‘cheaper’ Canon DSLRs I pressed the DRIVE AF Mode button and flicked the front dial one click, assuming that this would shift the camera from the ONE SHOT mode the previous user had left it, to AI SERVO:

D4D7475 Canon 5D Mk 4   First Thoughts

D4D7512 Canon 5D Mk 4   First Thoughts

But NO…..WTF is this:

D4D7484 Canon 5D Mk 4   First ThoughtsAI FOCUS…..what’s that all about then?  So I did something that pained me greatly – picked up the manual – and wished I hadn’t.

So we hit the internet, and the the first hit in a Google search was:

Screen Shot 2016 10 20 at 15.01.19 Canon 5D Mk 4   First ThoughtsThat sounded so interestingly unreasonable that I tried it – and soon stopped!

Nahh… it’s not for me – unless I’m missing something major!

So just make sure you are in AI SERVO if you or your subject, or both, are moving.

It’s cloudy outside and about 1.5 hours before sunset, but let’s step outside and do my basic ‘car number plate’ AF test in CASE 1, just to see ‘the lay of the land’ with this Canon 5D Mk 4:

Screen Shot 2016 10 20 at 17.19.55 600x313 Canon 5D Mk 4   First Thoughts

If you want to download the full resolution jpegs – 700Mb zip file – please click hereThe file is at my Dropbox, so if this post goes a bit viral then it may take a while to download.

So there are 30 images, no processing done to them at all, and they are all either 5000 or 6500 ISO.

Shot hand held, 1/2000th, f6.3, manual exposure with auto ISO and back-button-only focus. Maximum frame rate was not quite 7fps (well it didn’t sound like it anyway), and I tried to shoot bursts of around 5 or 6 frames.  It was only on the last of these that I was concious of shooting in buffer overflow.

Single Point AF was being used, in Case 1 – which isn’t best suited to this particular job.  But it’s my standard test with any Canon, just to see how far off the ball the camera/lens combo is.

Shutter release priority was set to FOCUS for the first frame, and +1 focus priority for the second and subsequent frames.

And I have to say I’m pretty impressed.  It’s done a heck of a sight better than I was expecting in Case 1.

Yes the shots have some noise and it certainly can’t hold a candle to its big brother 1DX Mk2 in that department, but then again its not been designed that way. Neither do I regard the noise as much of a problem either because it’s evenly distributed and not overly present in shadows.

But from an autofocus point of view the biggest percentage of those shots are on the money so to speak, and where it has gone wrong it’s only by a whisker; always slightly behind the target – that’s to be expected with an accelerating subject and Case 1 Accel/decel tracking of ‘0’, using a long telephoto.

A considerable improvement over the 5D Mk 3 in both noise and AF performance in my opinion, neither do I think the Mk 3 would have managed 30 frames in the same amount of time.

Over the next couple of weeks I’ll be posting more of my thoughts and findings about the Canon 5D Mk 4.  Tomorrow I’ll do some ISO testing and a bit more on the autofocus if the weather and time permit, so expect another post shortly!

And yes, it’s official, Andy HATES the bloody touch-screen!  Boy am I going to get myself in trouble with that – perhaps I’m too old to cope with such fangled gadgetry!

But that is balanced out by the pleasant surprise that the camera allows exposure compensation in manual mode – up to now a luxury presented to nearly all Nikon users, but only 1DX and 1DX Mk2 Canon owners (to my knowledge anyway) – nice one Canon, it’s about time!

logo simple Canon 5D Mk 4   First Thoughts

Canon 5D Mk 4 from £115.96 per month – Click HERE