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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 24 Aug 2016 (Wednesday) 21:29
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Canon 5D Mark IV -- Time to Discuss!

 
sploo
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Aug 26, 2016 17:06 |  #286

Talley wrote in post #18107379 (external link)
Yes we will. Exact same viewfinder from the 7D2 and it has it.... although it's a blinking red light.

Great news if that's the case, thanks.

Edit: page 150 of the manual linked by peteg1 confirms illuminated points in AI Servo. Happy with that.


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Aug 26, 2016 17:09 |  #287

Wilt wrote in post #18107363 (external link)
I have a hard time visualling one arc minute . I have an easy time imagining sitting in front of a 4K monitor if I need to be more than 5' back from the screen, else I only need a 1920x1080 display. I can estimate those even in the store.

If each pixel is half an arc minute, so a pixel triplet is represented in one arc minute, then if I were viewing a 5DIII image, I need 5760 horizontal pixels or 2879 arc minutes to display it at the limits of my vision, which is equal to 49 degrees. So if I have a 50" wide screen I need to sit 22" back (Tan 49). That seems excessively close. where the math go wrong?

It didn't. It just means that if you sit further back than 22", you will not be able to resolve all the detail that is presented. And 8K displays/projectors are relevant if you want to display 30 MP - they can hold ~33MP - so the discussion is on topic of how the heck you view the images from 5DIV if they are not printed:)
(When I make 24x36 prints from my 5DsR I can get real close to them - as close as my closest focus - and still see more detail - I'm just narrowing the FOV)


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sipowicz
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Aug 26, 2016 17:10 |  #288

OK guys. Time to make a new thread for this TV / screen / resolution discussion.




  
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sploo
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Aug 26, 2016 17:15 |  #289

George Zip wrote in post #18107387 (external link)
Yes. If we are going to to derail a thread, frankly I want to talk about carbine harvesters. 8-)

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How close do I need to get to it to see all the detail? :mrgreen:

Being serious - it occurs to me that a 1.5x subsampling (that is, turning every 3 pixels into 2) would give DCI 4K resolution with only a small crop required. Something around 1.09x I think (vs 1.64).

If there was the hardware to do that then the change in apparent focal length between stills and 4K video would be minor, and the increase in noise (due to using less of the sensor) would be much smaller.

I guess if it were possible it would already be present though; unless the Magic Lantern guys can do it ;)


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delta0014
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Aug 26, 2016 17:17 |  #290

Need to start a 5D4 thread discussing the still photos only.
The tv / whining about video discussion is boring the crap out of me......


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Wilt
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Post edited over 3 years ago by Wilt. (3 edits in all)
     
Aug 26, 2016 17:22 as a reply to  @ delta0014's post |  #291

Well until we start seeing images, and start seeing noise floor comparisons, any discussion of 5DIV non-video seems pretty limited to WiFi and GPS, a touchscreen, improved weather-sealing, and speculation about impact of more pixels, and speculation about noise, and speculation about the additional AF points and their effectiveness, and speculation about ...

Frankly, speculation is even more boring. Wanna speculate about when Canon adopts faster SD?


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Aug 26, 2016 17:25 |  #292

delta0014 wrote in post #18107404 (external link)
Need to start a 5D4 thread discussing the still photos only.
The tv / whining about video discussion is boring the crap out of me......

There is an easy way around the boredom:


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smythie
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Aug 26, 2016 17:26 |  #293

or grabbing your current camera and getting out and taking photos ;-)a


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John ­ Sheehy
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Aug 26, 2016 17:32 |  #294

gjl711 wrote in post #18107213 (external link)
I don't know. When I upgraded to a 4k tv the change in image was astounding even though there was no change in the input. We are still watching non-4k programing and it simply looks a whole lot better. Mayby I can't see every minute transaction but the overall effect is very noticeable.

I don't know where people come up with these ultra-conservative discrete resolution limits.

On low-resolution monitors, our eyes and brains are assaulted by the horizontal stagger of the red, green, and blue picture elements. It takes a lot of work for our eyes and brains to ignore the horizontal aberration. The more pixels the monitor has, the smaller the stagger is relative to the entire image, so even if your image is 1k, it looks better on a 2k monitor, and even better on a 4k monitor. 720-line video also resamples to 2160 better than it does to 1080. 150% resampling is problematic with under-sampled data, as just about all "good looking" video is.

On a 4k monitor, of a given size, a given person will walk backwards away from the monitor, and at some point they will not be able to distinguish a square filled with a checkerboard of black and white pixels from a solid gray square. Maybe this is what people are talking about, but I don't think that this is the limit of resolution. If you had a monitor next to that one, with 1/2 the pixel pitch, and you had on it an animation where a thin vertical white line that ran the full height of the monitor were stationary in one frame, and then in the alternating frame the middle 3rd of it shifted one pixel to the right, and then back again (a 2-frame loop), we would not see it move according to the conservative resolution theory, but I am very certain that I would see it, even though the movement is occuring at half the alleged resolution.

The resolution at which we blur dithers away is not the resolution limit for object or edge placement, IMO.




  
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don1163
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Aug 26, 2016 17:35 |  #295

George Zip wrote in post #18107387 (external link)
Yes. If we are going to to derail a thread, frankly I want to talk about carbine harvesters. 8-)

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forum: Canon EOS Digital Cameras

That should be ok.......at least theres a CROP factor involved :lol:


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Aug 26, 2016 17:35 |  #296

delta0014 wrote in post #18107404 (external link)
Need to start a 5D4 thread discussing the still photos only.
The tv / whining about video discussion is boring the crap out of me......

So what form of display device do you use to look at these stationary images? Can you see all the pixels on it? Or do you make a print only?
:D


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Talley
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Post edited over 3 years ago by Talley.
     
Aug 26, 2016 18:01 |  #297

smythie wrote in post #18107413 (external link)
or grabbing your current camera and getting out and taking photos ;-)a

EXACTLY!... Got my new ricebowl in so messing around with it and got this blooper when my kid just barely stopped long enough to snap it off.

80D is almost the perfect camera for me other than not FF :)


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Wilt
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Aug 26, 2016 18:05 as a reply to  @ Talley's post |  #298

New 'ricebowl' ? you went against our recommendations and purchased a LightSphere after all?


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Aug 26, 2016 18:09 |  #299

Wilt wrote in post #18107442 (external link)
New 'ricebowl' ? you went against our recommendations and purchased a LightSphere after all?

was on sale... i'm like a chick man... i literally SAVED so much money!!! even though it cost me lol. Cheetastand Ricebowl RB-90 = 36" deep parabolic softbox. This makes my first round modifier besides the beauty dish which I still haven't used... and still have to modify it to the bowen mount to use with my speed pro bracket. Looking forward to the round catch cans now. Gonna do some studio stuff this weekend and put the 80D to some use while I wait.


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Aug 26, 2016 18:28 |  #300

Wilt wrote in post #18107442 (external link)
New 'ricebowl' ? you went against our recommendations and purchased a LightSphere after all?

when did tupperware get renamed? Was confused for a good bit


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Canon 5D Mark IV -- Time to Discuss!
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