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Messages - Craig Richardson

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16
EOS Bodies / Re: 5D Mark III (or other) Followup
« on: January 24, 2012, 04:54:25 PM »
Apologies if anyone finds that argument too sinister.   ::)

Pun of the day!

17
EOS Bodies / Re: 5D Mark III (or other) Followup
« on: January 24, 2012, 04:29:43 PM »
Maybe, maybe ...

On the other hand, I still believe that this is not a 5D Mark III. Is remain the argument that the "focal plane mark" is on the right side and not the left side.
And why would 5D Mark III be tested with a 200-400 lens and a 600 lens (wildlife too)?! This suits better to a really fast focus camera like 7D or something new.

Wildlife photography was done well before autofocus, let alone "fast" autofocus was invented.  The fact they are making pictures of birds does not disqualify this as being a 5D mk iii.  Your implication that long lenses have no place on full frame cameras is perplexing.

18
EOS Bodies / Re: Announcement Date? [CR1]
« on: January 24, 2012, 04:03:18 PM »
2012 is shaping up to be the ultimate year of Gear Acquisition Syndrome.  First Fuji, then Olympus, and now Canon and possibly Leica... All I can say is there has never been a better time to be a photographer, keep up the good work Canon Rumors!

19
EOS Bodies / Re: 5D Mark III (or other) Followup
« on: January 24, 2012, 03:47:41 PM »
If not ... how do you explain that is no delimitation between the camera itself and the grip?

There's not?  What's that by his thumb?

... maybe an ergonomic gap for the thumb?! I dont know.
I can't see whats behind the thumb. Do you?

Marius, are you insisting that the grip is a permanent part of the body?  I clearly see the separation between the grip and the body and the big locking wheel.

20
EOS Bodies / Re: *UPDATE* 5D Mark III Sighting?
« on: January 23, 2012, 06:59:15 PM »
Perhaps the photographer is sending us a coded message in the EXIF data.  The pic is 25.2 megapixels, why not 25 exactly?  Because the new camera has 25 megapixels and is .2 or version ii, therefore it is code for 7D mk ii.  ;D

21
EOS Bodies / Re: *UPDATE* 5D Mark III Sighting?
« on: January 23, 2012, 05:49:14 PM »
The bird on the Display is indeed a Guineafowl, a Helmeted Guineafowl. It even shows the subspecies expexted in Kenya, the shot could well have been taken in popular Masai Mara:

Excellent work, I was wondering what that bird was!

EDIT: Just a thought, what if the missing flash, larger pentaprism, and strange inner viewfinder borders means that this is a 7D mk II with APS-H?

EDIT 2: Just realized this APS-H theory was brought up before.

22
EOS Bodies / Re: 5D Mark III Sighting?
« on: January 23, 2012, 03:51:52 PM »
I'm just curious as to how many people here actually bothered reading the article this post materialized from?   The photographer clearly states that he (Stephen Oachs) was on a shoot in Africa when he ran across the other photographer also doing the same.  That photographer identified himself as a Canon employee (Stephen is not) who was field testing two new lenses.  According to said employee, the 200-400 will be release in March or April.

The camera was not discussed and Stephen didn't notice the irregularities until later.  Seriously guys, before you go down the rabbit hole, at least read the original post if for no other reason than there are more photos of the new gear.

Yes, but this begs the question as to how Stephen Oachs was shooting with a 25.2 megapixel 1Ds MK iii?

23
EOS Bodies / Re: 5D Mark III Sighting?
« on: January 23, 2012, 03:42:43 PM »
Pity the photographer didn't just take a snap of the camera strap - much quicker way to ID the camera. I mean, it could have said EOS 5D Mark III ;)

You dont think canon would have been stupid enough to make it THAT easy for people to spot now do ya?   ;D

I don't know, they "forgot" that the 1Ds Mark III does not shoot 25.2 megapixel images (6144x4096) when they were doctoring the EXIF data!

24
EOS Bodies / Re: 5D Mark III Sighting?
« on: January 23, 2012, 03:28:21 PM »
Not related to the subject of the images but looking at the EXIF the camera is identified as a 1DS3 but the original resolution is 6,144 × 4,096. Not 1Ds3 resolution. Fishy?

http://regex.info/exif.cgi?imgurl=http%3A%2F%2Fcdn.canonrumors.com%2Fwp-content%2Fuploads%2F2012%2F01%2FB3J.jpg

6,144 × 4,096 EXIF data... if no PP, does it make a it a 25mp sensor? 1mp more than Sony/Nikon  ;).

So is it the 5d3 or 7d2?

Must be 5D mkIII because I can't see a 7D coming out without a popup flash to control current flashes.   It is quite common to change the camera model in the EXIF for pre-production models, however the images are typically down-resed to match the older model.

Can someone explain why the EXIF of the image of the prototype camera matters?  Is it a magic prototype camera that can take pictures of itself from odd angles?  Do we think the purported Canon employee had a second prototype camera and handed it to a stranger to take a picture of the first prototype camera to post on the Internet?

I believe this is a Canon employee being shot by another Canon employee (with a 5D mk III as well) for a controlled leak to hype up the camera.   Why would Canon charter a safari outing with the public when they could just easily go on private outing?

25
EOS Bodies / Re: 5D Mark III Sighting?
« on: January 23, 2012, 03:07:43 PM »
1. Why is the top LCD not showing anything readouts. It looks like the camera is turned off but the switch says on.

It looks like he is chimping so I don't believe the LCD should display anything at all.  I don't have my camera around to confirm this.

26
EOS Bodies / Re: 5D Mark III Sighting?
« on: January 23, 2012, 03:01:57 PM »
6,144 × 4,096 EXIF data... if no PP, does it make a it a 25mp sensor? 1mp more than Sony/Nikon  ;).

So is it the 5d3 or 7d2?

Must be 5D mkIII because I can't see a 7D coming out without a popup flash to control current flashes.   It is quite common to change the camera model in the EXIF for pre-production models, however the images are typically down-resed to match the older model.

27
EOS Bodies / Re: 5D Mark III Sighting?
« on: January 23, 2012, 02:45:22 PM »
not a 7D that's for sure (even if mine wasn't sitting right here the differences are obvious) but that widescreen LCD looks pretty sexy (16:9 ? if so that would be amazing, but it could just be the odd perspective of this photograph). nice new battery grip design too! but... if he has the grip why is he using the normal shutter release if he's shooting portrait, does this mean the grip is a prototype just for show?

 this can't be anything else but the new 5D III with new battery grip, of course it could be the 3D or 7D II but I highly doubt that.

On the first one, it appears he is just reviewing an image or using live view... the second, which looks like a 1d body, dunno... maybe he's more comfortable shooting that way...

I know when I am shooting with a collar and grip I will snap a landscape then quickly rotate for a portrait without taking my hands off the controls.  Taking your hands off the camera is a good way to miss a decisive moment or lose framing despite the fact it might be more comfortable to use the grip.

28
Lenses / Re: Sigma 50mm f1.4 EX DG HSM....are they any good?
« on: December 08, 2011, 04:00:26 PM »
EDIT 2: Lens is completely unpredictable, would not recommend at this point.

One thing I noticed about mine was if the camera is not steady (i.e. good handhold technique) I will often get both motion blur and OOF. It's as if the AF can't deal with much camera motion and still do its job. Only an issue at low aperture values.

Another thing I'm going to try even though I'm having good luck with this lens is shooting in AI servo mode when at low aperture values due to the very thin DOF. Several folks are recommending this in the Canon vs Sigma 85mm thread and it makes alot of sense. May be worth a try for you.

I can't get my head around how a lens can be so out of focus (like -11 needed to take a picture of the CN Tower because of back focus) but the phase detection can declare it in focus.   What exactly did Sigma have to do to reverse engineer this focusing system?   I also don't understand how this switches to front focus under 10 feet... or why when I use high quality B+H UV, CPOL, or ND filters the focus problems sometimes reverse themselves.  Gentec has alot of work cut out for them when I bring this thing back again to them.

EDIT: I have done some light reading and came up with this gem:

Quote
When you half-press the shutter release (or the * button, if you've used the custom function to move focusing control there), the activated AF sensor "looks" at the image projected by the lens from two different directions (each line of pixels in the array looks from the opposite direction of the other) and identifies the phase difference of the light from each direction. In one "look," it calculates the distance and direction the lens must be moved to cancel the phase differences. It then commands the lens to move the appropriate distance and direction and stops. It does not "hunt" for a best focus, nor does it take a second look after the lens has moved (it is an "open loop" system).

If the starting point is so far out of focus that the sensor can't identify a phase difference, the camera racks the lens once forward and once backward to find a detectable difference. If it can't find a detectable difference during that motion, it stops.
Source: http://www.zen20934.zen.co.uk/photography/Canon%20AF%20System.htm

So what basically happens is that when the camera gives the instruction to the lens to move, the Sigma lens understands that it is a move order but does not move precisely enough.  Because there is no second check on focus, errors are left uncorrected.  This is why AI-SERVO seems to work better because the camera is constantly looking at the focus and making corrections, it creates a closed loop and errors eventually reach zero, or so you would think! 

This also explains the strange pulsing behavior of this lens in servo mode because the camera is expecting the lens to nail focus after the first move order, but it doesn't so therefore the camera thinks the subject must have moved so it calculates a delta for subject shift and comes up with a move solution and tells the lens to execute, which it does but the lens screws up again, and so on and so on.

Another update: AI Servo works really well.

29
Lenses / Re: Sigma 50mm f1.4 EX DG HSM....are they any good?
« on: December 07, 2011, 12:07:47 PM »
Might be a bit late to join the party here, but my brand new Sigma 50mm 1.4 is currently "in the shop".  I had to take it over to Gentec International for calibration.  Turns out they are located in Markham, Ontario about 10 mins away from my house, I don't think they get very many drop-ins but were very nice and immediately confirmed my front focusing issue on their own rebel body.  I hope to get it back by the end of the week.

Just a quick update, my Sigma was reprogrammed by Gentec and it is nailing focus now from a few quick tests I have run at close range.

EDIT: I was still having unpredictable focus shift problems until I read Skitron's post and removed my B+H UV filter and now close focus is good again.  I really hope the far focus is fixed too because it was back focusing today at a distance.

EDIT 2: Lens is completely unpredictable, would not recommend at this point.

30
Lenses / Re: Sigma 50mm f1.4 EX DG HSM....are they any good?
« on: December 05, 2011, 03:25:10 PM »
Might be a bit late to join the party here, but my brand new Sigma 50mm 1.4 is currently "in the shop".  I had to take it over to Gentec International for calibration.  Turns out they are located in Markham, Ontario about 10 mins away from my house, I don't think they get very many drop-ins but were very nice and immediately confirmed my front focusing issue on their own rebel body.  I hope to get it back by the end of the week.

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