September 22, 2014, 12:17:33 PM

Author Topic: Canon EOS 7D Mark II Information [CR1]  (Read 30039 times)

Bosman

  • 1D Mark IV
  • ******
  • Posts: 879
    • View Profile
    • Bosman Photography
Re: Canon EOS 7D Mark II Information [CR1]
« Reply #135 on: March 11, 2013, 01:25:02 AM »
This doesnt seem to be a 7D II concept but a 3D or whatever concept since it would sit between the 1d and the 5d much like the 1dm3 did. Thus Like neuroanatomist mentioned about $4000.

I would expect an excellent game changer 7DII to be $3000. Who nows really, only Canon.

Its nice to see CR posting about focus speeds being related to voltage output, it seems to not be understood by many as the reason why a 5dm3 and 7d can't focus as fast. But then there are also many that do. I am re-stating it to continue the awareness.


whilst I see you point, I think that canon has made the 1-series "universal" in going high-speed and full-frame.

this does leave a gap in the line that can be filled; a cropped sports camera.  the 7-series is such a camera

as for the 3-series, that's been desired for years but with little basis in reality.  a new 7-series is somewhat more likely
I wasn't denying the 7d2 possibility just the specs being a 7d2. These specs make me think of 1dm3 and 1dm4 at $4000 or more. A 7D2 should be around $2500/$3000 in my guestimate.
Bosman Photography www.bosmanphotography.com, Fast Photo Pro www.fastphotopro.com
Follow Bosman Photography on Facebook http://www.facebook.com/Bosman.Photography
Sports Photography  Follow Fast Photo Pro on Facebook http://www.facebook.com/Fast.Photo.Pr

canon rumors FORUM

Re: Canon EOS 7D Mark II Information [CR1]
« Reply #135 on: March 11, 2013, 01:25:02 AM »

Noink Fanb0i

  • PowerShot G1 X II
  • ***
  • Posts: 64
    • View Profile
Re: Canon EOS 7D Mark II Information [CR1]
« Reply #136 on: March 11, 2013, 10:56:07 AM »
If Canon wants the next 7D to focus as fast as 1-series bodies, they only have 2 choices: use an integrated grip body to accommodate the higher-voltage 1D-series batteries or develop a smaller version of that higher-voltage battery that can fit in the handgrip of a 7D body (lesser capacity obviously).

To those who still have not figured out why 1D-series bodies AF faster than lesser bodies even with the same lens, here's a simple yet clear comparo between a 1D2 body and a 5D using the same lens (85L with lenscap on, measuring how fast the lens spins from MFD to infinity):

https://www.youtube.com/watch?v=8Yr0BaYYCnQ

Of course, only Canon knows if it's just firmware, AF CPU, higher lens driving voltage, or a combination of all 3 that is responsible for the performance delta.

T3 is the bobn2 of Canon fanb0is.

KyleSTL

  • 7D
  • *****
  • Posts: 419
    • View Profile
Re: Canon EOS 7D Mark II Information [CR1]
« Reply #137 on: March 11, 2013, 12:47:20 PM »
Wouldn't it be easy enough to modify a cheap extension tube (like this one on eBay) so that a osciliscope could be hooked up to the Vbat and A_GND contact to see exactly what voltage is driving the AF system for a given camera?



That might not tell you what's going on downstream between the AF electronics and the USM motor, but it might help to support the higher-voltage/faster-AF theory.  If the voltages for a 7.4V-based camera and an 11.2V-based camera are the same, then that theory can be put to bed.
Canon EOS 5D | Tamron 19-35mm f/3.5-4.5 | 24-105mm f/4L IS USM | 28-105mm f/3.5-4.5 USM | 70-300mm f4-5.6 IS USM
15mm f/2.8 Fisheye | 28mm f/1.8 USM | 50mm f/1.4 USM | 85mm f/1.8 USM | 3x 420EX | ST-E2 | Canon S90 | SD600 w/ WP-DC4

pierlux

  • Rebel T5i
  • ****
  • Posts: 128
    • View Profile
Re: Canon EOS 7D Mark II Information [CR1]
« Reply #138 on: March 12, 2013, 11:13:18 AM »
Wouldn't it be easy enough to modify a cheap extension tube (like this one on eBay) so that a osciliscope could be hooked up to the Vbat and A_GND contact to see exactly what voltage is driving the AF system for a given camera?



That might not tell you what's going on downstream between the AF electronics and the USM motor, but it might help to support the higher-voltage/faster-AF theory.  If the voltages for a 7.4V-based camera and an 11.2V-based camera are the same, then that theory can be put to bed.
Actually, after reading the nth post claiming "a higher voltage may likely drive the AF motor faster", "maybe Canon will develop higher voltage batteries..." "it seems there's still someone who doesn't get that a higher voltage..." and things like those, I gave up replying. But look at the figure above: Vbat and A_GND is the power line which feeds the lens' motors, and it's +6/-6 Volts in any camera. VDD and D_GND is the power line that feeds the logic, and it's +5.5/-5.5 Volts in any camera. You can check it yourself, no need for an oscilloscope, just use a Voltmeter on your camera, the red terminal on Vbat and the black one on A_GND. Note that the large contact A_GND on the lens corresponds to 2 contacts on the camera, pick any of them: you'll read 6 Volts.

By the way, Chuck Westfall NEVER said the 1D X focuses faster than the 5D III because the battery has a higher voltage, he said it's because it's more poweful, and, indeed, it is. Roughly 4 W more than dual LP-E6.

I think I'll start another thread on this matter in the near future, it seems so many are interested, and it also seems there's a lot of misconception regarding this.
« Last Edit: March 12, 2013, 12:36:58 PM by pierlux »

Bosman

  • 1D Mark IV
  • ******
  • Posts: 879
    • View Profile
    • Bosman Photography
Re: Canon EOS 7D Mark II Information [CR1]
« Reply #139 on: March 14, 2013, 05:52:50 PM »
Neuro, I'm not mentioning voltage at all, instead I said 'current'. I think the two batteries in the grip are not 'used' in an alternate sequence, they are used simultaneously. Actually, inserting two discharged batteries, both incapable of even letting you switch the camera 'on' when used alone, will let you switch the camera 'on' and even shoot photos. It's the shutter count per battery that is calculated in an alternate sequence, being not possible to show 1/2 increments per battery, which would be nonsense. They are connected in parallel, so the voltage is the same, but are capable of delivering double the current of a single battery

Makes sense.  However, empirically the single battery of a 1-series does drive the lens AF motor faster than the pair of batteries used in a grip.  This is evident when a 'slow focusing' lens like the 85L II (where the focusing group movement is visible and slow enough to be easily seen) is focused from MFD to infinity on the 1D X vs. a gripped 7D, with fresh batteries.  I'm not sure about the electronic basis for the difference in AF speed (current draw or firmware), but the difference is there.

 All the top-end Canon lenses use ultrasonic motors. These are not like normal electric motors where the higher voltage you feed them, the faster they go. The speed depends on the frequency and phasing of the drive signals, and that is generated by the lens microcontroller from a quartz frequency source, it won't change with supply voltage. The only way that the grip would allow faster focus is if the firmware was deliberately slowing down the focus to preserve battery power. That is possible, it might be a bad thing if the camera gets a reputation for low battery life. That's what Nikon is doing - the speed restrictions without grip are entirely firmware. Canon has thankfully been free of that kind of silly marketing ploy, I hope that they don't start now.
I guess Chuck Westfall of Canon got it wrong according to you. He says the higher voltage is the reason but maybe you are right.
Bosman Photography www.bosmanphotography.com, Fast Photo Pro www.fastphotopro.com
Follow Bosman Photography on Facebook http://www.facebook.com/Bosman.Photography
Sports Photography  Follow Fast Photo Pro on Facebook http://www.facebook.com/Fast.Photo.Pr

pierlux

  • Rebel T5i
  • ****
  • Posts: 128
    • View Profile
Re: Canon EOS 7D Mark II Information [CR1]
« Reply #140 on: March 14, 2013, 10:32:16 PM »
I guess Chuck Westfall of Canon got it wrong according to you. He says the higher voltage is the reason but maybe you are right.

Actually, CW says:

http://www.arihazeghiphotography.com/AH_CW_interview/

... In addition, the EOS-1D X achieves a higher lens motor drive speed with select L-series USM telephoto lenses than the 5D Mark III because of the 1D X’s more powerful battery pack.

He didn't mention voltage.

siegsAR

  • Canon AE-1
  • ***
  • Posts: 77
    • View Profile
Re: Canon EOS 7D Mark II Information [CR1]
« Reply #141 on: March 26, 2013, 04:09:44 PM »
It seems 70D will be released first; so for the 7DMkII maybe Digic 6?

And it'll probably be pricier than the 6D significantly, further complicating the choices for those who'd want the 6D.

Also the reason to delay the 7DMkII to sell more 6D's LOL.  :P
Tsk! Come on son..

canon rumors FORUM

Re: Canon EOS 7D Mark II Information [CR1]
« Reply #141 on: March 26, 2013, 04:09:44 PM »

Don Haines

  • Canon EF 300mm f/2.8L IS II
  • *******
  • Posts: 3207
  • Posting cat pictures on the internet since 1986
    • View Profile
Re: Canon EOS 7D Mark II Information [CR1]
« Reply #142 on: March 26, 2013, 08:51:37 PM »
I see two big ways that the 7D2 and 70D can distinguish themselves from the Rebel line. One is sensor and the other is focus. If you look at the 7D and the 60D, there are a few minor differences between cameras, but only two big diferences. The 7D has way beter focusing and the 60D has the articulating screen.

I would not be surprised to see new sensors in both. I would expect to see touchscreens, wifi, and GPS in both. I expect the difference to be significantly better AF and a higher frame rate in the 7D, with a few minor improvements... I would also expect NO articulated screen in the 7D2.

Time will tell. I have no intentions of getting a 70D, but since it's features will give a good clue to the 7D2, I eagerly await it's announcement.
The best camera is the one in your hands

bdunbar79

  • Canon EF 300mm f/2.8L IS II
  • *******
  • Posts: 2576
    • View Profile
Re: Canon EOS 7D Mark II Information [CR1]
« Reply #143 on: March 26, 2013, 08:54:59 PM »
I guess Chuck Westfall of Canon got it wrong according to you. He says the higher voltage is the reason but maybe you are right.

Actually, CW says:

http://www.arihazeghiphotography.com/AH_CW_interview/

... In addition, the EOS-1D X achieves a higher lens motor drive speed with select L-series USM telephoto lenses than the 5D Mark III because of the 1D X’s more powerful battery pack.

He didn't mention voltage.

So it's the wattage?
2 x 1DX
Big Ten, GLIAC, NCAC

wickidwombat

  • Canon EF 400mm f/2.8L IS II
  • *******
  • Posts: 4512
    • View Profile
Re: Canon EOS 7D Mark II Information [CR1]
« Reply #144 on: March 26, 2013, 09:00:04 PM »
I see two big ways that the 7D2 and 70D can distinguish themselves from the Rebel line. One is sensor and the other is focus. If you look at the 7D and the 60D, there are a few minor differences between cameras, but only two big diferences. The 7D has way beter focusing and the 60D has the articulating screen.

I would not be surprised to see new sensors in both. I would expect to see touchscreens, wifi, and GPS in both. I expect the difference to be significantly better AF and a higher frame rate in the 7D, with a few minor improvements... I would also expect NO articulated screen in the 7D2.

Time will tell. I have no intentions of getting a 70D, but since it's features will give a good clue to the 7D2, I eagerly await it's announcement.

I agree, the smart move would be to put the current 7D AF maybe tweeked a bit into the 70D it would essentiaqlly become the 7D low price replacement.

then give the 7D2 the 61 point AF and awesome build essentially put a new crop sensor into a 5Dmk3 10FPS?
maybe 8FPS full raw and 10FPS jpg or something like that, depends what processing they give It esspecially if it gets more megapickles I doubt it would get 10FPS raw as thats getting closer to eating 1Dx lunch.

what canon ACTUALLY do might cause some head scrathing however based on current form :P
it will be more in  the 5Dmk3 price range but I can still see it selling tons
APS-H Fanboy

canon rumors FORUM

Re: Canon EOS 7D Mark II Information [CR1]
« Reply #144 on: March 26, 2013, 09:00:04 PM »