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Messages - 3kramd5

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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).

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 doesn't really matter, 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.

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."

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.

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 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.

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.

Exactly! :-)

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

 ::) ::) ::)


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.

* 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:

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

EVF lag is not that big a deal, it's minimal, keep your other eye open for critical shot timing.

That's a work around, but no matter; I expect EVF lag to get better. Processing power keeps moving forward.

The bigger concern I have with EVF is power consumption. Batteries are not keeping pace.

Ceteris paribus, I don't care what tech is used to put the scene as viewed through the lens in front of my eye. As long as it doesn't affect the functionality and experience, it could be a mirror, an OLED display, or a DSub cable plugged into the side of my head. Currently, however, all else is not equal.

EOS Bodies / Re: 7DII full frame?
« on: September 08, 2014, 09:23:57 AM »
What is the probability that this is confirmed???


Third Party Manufacturers / Re: And what does Canon do?
« on: September 05, 2014, 05:26:13 PM »
Things keep changing. They won't stop changing, and the changes are only going to accelerate.

Can I ask how (without an increase in bit depth)?

Third Party Manufacturers / Re: SIGMA 150-600!!
« on: September 05, 2014, 05:14:07 PM »
So is the difference between 294mm/2.8 (105mm) and 300mm/2.86 (105mm).


What you're calling the "entrance pupil" is what I mean by "clear aperture". It's the apparent aperture as viewed from the front of the lens. A long time ago, I was interested in astronomy. "Clear aperture" is the phrase that I heard/read then.

Interesting. Good to know.

Third Party Manufacturers / Re: SIGMA 150-600!!
« on: September 05, 2014, 04:01:53 PM »
As for wanting constant f/5.6, I don't see that as important or even useful. Remember, the camera body tells the lens what aperture to use and the lens has to figure out how to do it.

Well every quant of light counts.

It´s not much but it´s still better.
And with that weight plus over the Tamron it would be a nice bonus.

But i guess there are reasons for not doing it. Who knows how much more it would weight than.

600/5.6 results in a 107mm clear aperture, same as 300/2.8. The filter size of both this lens and the 120-300 is 105mm. Therefore, the 120-300 f/2.8 can't reach 300mm or be f/2.8 at that focal length.

Zoom lenses rely on magnification of the aperture. The physical aperture on the 120-300 isn't 107mm, it's probably not even 43mm (I assume there is some magnification at 120mm). However, the entrance pupil (aperture as magnified by the optics) is.

Perhaps you mean that the 120-300 can only actually be f/2.85 (i.e. 105mm) at full zoom? There is quite a bit of rounding in lens marketing. The difference between f/2.8 and f/2.85 is negligible to most anyone.

EOS Bodies - For Stills / Re: 5DIII dual cards
« on: September 05, 2014, 02:21:00 PM »
You wonder if Canon choose this SD card interface to save 7 cents or some crap like that.

That wouldn't surprise me in the slightest, especially if they had enough old SD stuff lying around to fulfill much of the production run.

Third Party Manufacturers / Re: Why the delay for the Tamron 150-600?
« on: September 05, 2014, 12:51:37 PM »
Has Canon ever produced a super tele-zoom lens?  I mean, something that goes into the 500-600mm range like this Tamron or the newly announced Sigma.  If there is such demand, I'm surprised that they have not decided to produce one.


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