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Messages - 3kramd5

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31
EOS Bodies / Re: Time wasted... re: 7D Mark II
« on: September 15, 2014, 11:34:49 AM »
Now that the 7D Mark II has been announced and we know all the specs and pricing, do any of you look back on the countless threads and posts that you read and/or wrote as time wasted?

No. It's entertainment.

32
EOS Bodies / Re: FF Canons are falling behind.
« on: September 15, 2014, 09:49:58 AM »
The Df with no Canon competitor?  Why should Canon bother competing with a camera that isn't selling?   ::)

HEHE.  Canon's retro look is hidden behind every one of their AA filters.

Are you implying that the days of AA filters are over?  I think Nikon is taking a bold step by forcing the AA/no-AA filter choice on the D810 as opposed to it being up to the purchaser with the D800.  I wouldn't feel comfortable not having that as a choice.  If I was a D800 user (not a D800E user), I might be hesitant to upgrade.

No, he's talking about what's literally behind the AA filter: the sensor.

In other words: canon sensors are only good enough to produce a "retro look."

33
EOS Bodies / Re: Video Review: Canon EOS 7D Mark II
« on: September 15, 2014, 09:35:08 AM »
...infomercial?

What tipped you off? The Canon logo at the top right? heh.

34
EOS Bodies / Re: How does the reveal of the final 7D2 specs make you feel?
« on: September 12, 2014, 11:43:13 AM »
NO TOUCHSCREEN. OK..... HOW DOES THE DPAF WORK? How do we pick focal points?

Same way you do with most every Canon SLR, I imagine. I doubt each one will be selectable; rather they'll be used to assist tracking (when you wouldn't be selecting anyway).

I made a video...  70d vs 7d MarkII, focusing on video shooting.

https://www.youtube.com/watch?v=nLX7v3LO25c

Ah, for video application I suppose touchscreen would be helpful. 7D2 is clearly not a video-centric camera.

35
EOS Bodies / Re: How does the reveal of the final 7D2 specs make you feel?
« on: September 11, 2014, 08:39:52 PM »
NO TOUCHSCREEN. OK..... HOW DOES THE DPAF WORK? How do we pick focal points?

Same way you do with most every Canon SLR, I imagine. I doubt each one will be selectable; rather they'll be used to assist tracking (when you wouldn't be selecting anyway).

36
EOS Bodies / Re: How does the reveal of the final 7D2 specs make you feel?
« on: September 11, 2014, 05:21:59 PM »
DPAF uses every pixel covering 80% of the image sensor, no image data are lost, no interpolation is required, and on that 20 MP sensor you have 16 million AF points. 

That's actually not true, and I'm pretty sure you know that. You need multiple DPAF pixels to be able to properly detect a phase differential, just like the strips in a dedicated PDAF sensor are made up of multiple pixels in strait or diagonal lines.

You don't actually have 16 million AF points.

Bear with me for a second. On a standard PDAF unit, there are discreet lines of pixels making up individual AF points. On DPAF (lovely similarity between acronyms), there aren't discrete lines of pixels, there is a grid of pixels.

Say it takes 3 adjacent pixels (random number, I'm sure it's far more) to constitute a line. If I have 10 adjacent pixels, I have 8 lines. My number of lines is limited by the borders.

Scale that up.

Given the total 20-ish megapixels and however many are necessary to constitute functioning lines, is it impossible that there are 16 million locations in which phase can be detected?

canon is not about invention. these times are long gone.

To that point... out of curiosity, if Canon followed Nikon's lead and started purchasing sensors from a third party vendor and instantly made up the low-iso-DR and resolution gaps, would that constitute innovation/invention?

37
EOS Bodies / Re: How does the reveal of the final 7D2 specs make you feel?
« on: September 11, 2014, 12:00:47 PM »
"In general, I am excited about the list of specs."

38
EOS Bodies / Re: Canon EOS 7D Mark II Specifications Confirmed
« on: September 11, 2014, 09:56:26 AM »
Looks very promising for good light situations where I want more pixels on target. Coin toss whether I get one (based on asking price).

39
Wow!  Really F6.3 being marketed as a sports lens?  Maybe on the planet Venus.  Rarely is F6.3 enough to stop sports action.

Rarely? I shoot surf at f8.

With what lens, though? Remember, lenses AF at max aperture. AF at f/6.3 is very slow. Even f/8 AF with a body that supports it is rather slow. Compared to AF at f/5.6, which is ok, or f/4 and f/2.8, which is wicked fast.

You may shoot at f/11 or f/16 for your sports...it doesn't really matter, though...as AF is always performed wide open. When it comes to Canon bodies, their AF points offer different capabilities at different apertures. By f/5.6, most Canon AF units only support basic line AF. At f/4 you get full cross type for many points, but the high precision double cross type points require f/2.8.

He's talking about stopping motion, by which I assume he means exposure time, not AF.

40
Third Party Manufacturers / Re: Nikon D750 to be Canon 5D3 competitor?
« on: September 10, 2014, 12:47:52 PM »
"Good enough" technology always trumps the "best."

mhm....  ::)

In the engineering world, we often say "better is the enemy of good enough."

41
Reviews / Re: Tony Northrup - D810 vs. 5D Mk3
« on: September 10, 2014, 10:39:19 AM »
This shouldn't be difficult to accept. There's a reason it's in the 1D X, and purported to be in the 7D II as well. But if you want to see a great implementation of it - just try a D810. Seriously, just try it. Go to a camera store, and slap some 24/1.4 primes on some bodies. Put a 5D3 in 'auto 65 point selection' mode with AI servo, a 1D X in the same mode but w/ iTR engaged, and a D810 with 3D AF tracking mode engaged. Start on a subject in the center (or whatever focus point you've chosen), then move the camera around wildly (or have the subject dance/run around if you want/can). Be amazed at what how the camera can swiftly move the AF point to stay on the subject. Or not.

Are you saying you can slap on a fast prime, focus dead center, and then rotate ("recompose" generally involves much more rotation than translation, obviously) the camera about its own axis so the initial subject as seen by the AF unit goes from one side of the frame to the other (or at least from the borders of the PDAF sensors) and significantly out of the DOF and it will track it?

If so, that's cool and I do not believe my 5D3 could do such.

42
EOS Bodies / Re: This news is exciting!
« on: September 09, 2014, 10:29:49 AM »
Lastly if the 7d2's sensor is indeed the same as the 70d then what does that say about Canon's sensor R&D?

It says very little about their R&D. The numerous patents they've filed do.  They likely have significantly more tech which they haven't patented in order to keep secret, but that's just a suspicion.

Are they going to sit out this recession with their existing sensor technology and wait for the economies of the world to pick up before spending money on R&D? or do they just not have it? Or will they release it later...like we have been 'rumoring' for the last couple of years?

No, they're actively developing technology including sensor tech. If and when it comes to market, as in the case of DPAF, is a business decision.

43
Third Party Manufacturers / Re: Nikon D750 to be Canon 5D3 competitor?
« on: September 09, 2014, 10:22:07 AM »
The comparison was being made that if Canon is the best camera making company based on unit sales then McDonalds is the best food making company based on unit sales.

That's probably a fair assessment (assuming the data supports it). There's a difference between being the best camera/restaurant/automobile company and the company that makes the best camera/franchise scheme/automobile. There's also a difference between being the best camera company and the company which makes the best imaging sensors for given parameters. There's also a difference between the best camera (which is largely subjective) and the best imaging sensor (which largely depends on use case).

Why are we getting sidetracked by a dodgy analogy?

Hey, it's something new. Better than reading the same progression of posts time and again.

44
Exactly! :-)

The only real question is:  Will mirrorless kill Canon dSLRs before Canon's sup-par sensor technology kills Canon dSLRs? 

 ::) ::) ::)

 :P

And the answer, of course, is that neither are likely to kill canon. They have proven fairly adept at understanding the market, there's no reason to assume they will suddenly stick their heads in the sand if the market for their product lines evaporate. Rather, there is sufficient reason to assume they'll respond if and when that happens.

45
* battery charge - not equal, partly due to higjher power requirement from EVF/LCD

Party? Putting a differently shaped DSLR battery into a MILC doesn't negate the large power drawn by backlit displays.

Check out figure 9. Granted that's a cellphone, but I imagine the breakdown in cameras is similar: https://www.usenix.org/legacy/event/usenix10/tech/full_papers/Carroll.pdf

Then again, I guess people who use SLRs to shoot video aren't bothered by it, so maybe it's much ado about little.

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