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Author Topic: Canon EOS 70D Spec List [CR3]  (Read 140274 times)

pato

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Re: Canon EOS 70D Spec List [CR3]
« Reply #315 on: July 01, 2013, 11:15:51 AM »
Maybe it got built-in flash as a trade to the GPS? :) I really wonder how good the ISO performance will be, that is what currently limits me the most on my 550D.

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Re: Canon EOS 70D Spec List [CR3]
« Reply #315 on: July 01, 2013, 11:15:51 AM »

dgatwood

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Re: Canon EOS 70D Spec List [CR3]
« Reply #316 on: July 01, 2013, 02:38:47 PM »
Concerning gps: I disagree, and here are my reasons, but as always I'm open to being convinced otherwise :-)

But first off: I've got nothing against built-in gps if it's thrown in there for free, but as it stands it's likely it's used as a marketing item and adds the same amount or more $$$ then an external logger.

If it does, it's because they're choosing to sell it that way.  The actual cost is orders of magnitude less, because 95% of the cost of an external logger comes for free when put in-body—no battery, no case, no additional CPU.  All you have is a GPS chip that costs maybe a buck or two, an antenna that costs maybe a buck or two, and possibly a slightly larger logic board to hold the extra chip, for a grand total cost of maybe $3–5.



* much(!) less precise / updates pos. much more seldom
There's absolutely no reason why this should be the case.  In fact, if anything, the reverse should be true.  The camera should query the GPS for its actual position when you take a shot

In theory, yes. But do you think the 6d takes the signal on every shot?

Hardly, like other embedded gps devices it's build for power saving rather than precision, in real life the logging frequency of a dedicated logger in the trunk can be so high you can get a precise log of a fast moving car.

From a power perspective, I'd expect a track log to be worse on the average because the GPS has to be brought back up to an active state regularly even when you aren't shooting photos.  The cost to ask for another reading is basically zero while the chip is up and running.  But that probably depends on the workload.

In an ideal world, a device like this would switch into track log mode if you shoot a picture and it has no signal, and should then apply the first position to any photos taken while the signal was unavailable.  This would still require less power than continuous track logging, but would eliminate the most obvious issue with taking a measurement when you click the shutter.


* no a-gps (camera needs longer to find the satellites).
aGPS can cut this so-called "warm fix" down to a couple of seconds by fetching that data over the cellular network.

Nope, on better non-smartphone loggers with a-gps you can also upload this data from the pc for the next months or so thus severely shortening the fix time when it's cloudy.

With the caveat that if they have to make an emergency position correction on a satellite to avoid hitting a piece of space junk, your computed location could be off by hundreds of miles.  There's a reason they only guarantee the ephemeris to be accurate for 4 hours.  :)


Thus, unless you're very rarely taking pictures, the warm fix time affects you once per day, and only if you don't power up the camera until just before you take your first shot of the day.  After that initial warm fix, every acquisition should be a "hot" fix, which means that it should take about as long as it takes you to move your thumb from the power switch and pull the camera up to your eye, give or take a second.

Amen. I didn't try the 6d gps and I hope it works this way... but at least my last phone traded precision for power saving, but maybe today's gps chips are more advanced.

The one disadvantage of the gps logger that you have to attach the track log to your pictures afterwards, but this is done with one click in Lightroom or other apps. For me, in-camera gps is a gadget I could really do without.
The bigger disadvantage is that it has no idea when you actually took a picture, so you have to choose a query interval that trades battery life for accuracy or vice versa.

Cell phones have much smaller batteries than your camera.  The iPhone 5, for example, has a battery capacity that's less than a third of a 6D's battery, and that's with not just Wi-Fi and GPS, but also a cellular radio.  :-)


Your camera clock should be so precise so that's not often necessary...

Digital clocks drift, on average, by something like five seconds per day.  In two weeks' shooting, that's an error of more than a minute.  Maybe the clock in recent Canon cameras is more precise than that, but I wouldn't hold my breath.  :)

Apop

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Re: Canon EOS 70D Spec List [CR3]
« Reply #317 on: July 01, 2013, 03:15:50 PM »
Buffer depth is really important for me...., I hope canon isn't doing like nikon did with the d7100, 6 raw files buffer dept :/
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luciolepri

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Re: Canon EOS 70D Spec List [CR3]
« Reply #318 on: July 01, 2013, 04:26:27 PM »
I'm afraid 20.2 MP means moiré issues...

skitron

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Re: Canon EOS 70D Spec List [CR3]
« Reply #319 on: July 01, 2013, 06:48:46 PM »
Any word on AFMA? It's a non-starter for me without it.
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Act444

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Re: Canon EOS 70D Spec List [CR3]
« Reply #320 on: July 01, 2013, 06:55:52 PM »
Any word on AFMA? It's a non-starter for me without it.


I'm guessing we'll know in a few hours?

seasamshoot

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Re: Canon EOS 70D Spec List [CR3]
« Reply #321 on: July 01, 2013, 07:04:54 PM »
Anyone else feel like Stephen Colbert when a new Apple Product launches. All I am thinking about is "GIVE IT TO ME!! I WANT!"

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Re: Canon EOS 70D Spec List [CR3]
« Reply #321 on: July 01, 2013, 07:04:54 PM »

luciolepri

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Re: Canon EOS 70D Spec List [CR3]
« Reply #322 on: July 02, 2013, 03:56:25 PM »
I'm afraid 20.2 MP means moiré issues...


OK, WHY? HMMM
all sensors who not can out resolves the lenses you are using corse moire in some line structures
so what do you mean?

I was talking about video, I should have mentioned it...
It looks like the 20.2 mp sensor doesn't handle line skipping very well.

whothafunk

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Re: Canon EOS 70D Spec List [CR3]
« Reply #323 on: July 02, 2013, 05:41:01 PM »
Buffer depth is really important for me...., I hope canon isn't doing like nikon did with the d7100, 6 raw files buffer dept :/
16 RAW and 65 JPEG for 70D, if I remember correctly.
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jdramirez

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Re: Canon EOS 70D Spec List [CR3]
« Reply #324 on: July 02, 2013, 05:52:06 PM »
Does the 70D have AFMA?  I didn't see any anywhere, so I'm guessing no, but maybe.
Upgrade  path.->means the former was sold for the latter.

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neuroanatomist

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Re: Canon EOS 70D Spec List [CR3]
« Reply #325 on: July 02, 2013, 05:54:45 PM »
Does the 70D have AFMA?  I didn't see any anywhere, so I'm guessing no, but maybe.

Yes it does.
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jdramirez

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Re: Canon EOS 70D Spec List [CR3]
« Reply #326 on: July 02, 2013, 06:57:53 PM »
 then,  outside of build quality and a few faster shots per second,  what advantage does the 7d mki have over the 70d?
Upgrade  path.->means the former was sold for the latter.

XS->60D->5d Mkiii:18-55->24-105L:75-300->55-250->70-300->70-200 f4L USM->70-200 f/2.8L USM->70-200 f/2.8L IS Mkii:50 f/1.8->50 f/1.4->100L-> 85mm f/1.8 USM-> 8mm -> 85mm f/1.2L mkii

skfla

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Re: Canon EOS 70D Spec List [CR3]
« Reply #327 on: July 02, 2013, 07:30:07 PM »
I've been reading this thread (or maybe it was 1 of the many other 70D threads?) since last night & only a few people have mentioned my concern. So I guess I'm overly concerned about a minor issue.  BUT, of course, I'll bring it up anyway. 

Is anyone concerned about the focusing sensitivity only going down to -.5ev? Is this going to be a problem in medium/low or low light situations w/ anything other than a fast prime? Or even w/ a fast prime? I mean we've got this great new Dual Pixel focusing system so I can't imagine Canon would do this if it really is going to prove problematic, right? I mean they just went through the marketing disaster with the EOS M, would they really do this to something w/ the sales/profit potential of the 70D??

I know the standard answers are:  No, no, not a problem-you're just obessing about some minor little thing.  Or perhaps the always safe (but much less fun): we'll just have to wait & see.

I'm curious because I use a 7D as my back up.  I've always felt it did just fine w/ low light focusing-until I borrowed (& then rented) a 6D.  The 6D, w/ its infamous single center cross focus point, really did amaze when I used it in low light.  After that, I want something that has either the -3ev capability or at least something close to it. 

I have to admit that I was thinking about switching out my back up for something newer (touchscreen, silent mode, a new sensor, deeper bracketing, & I admit to being curious about using wireless remote control once the apps start coming out).  The 70D is still a consideration once the initial pricing drops a little given that I can cover most or all of the cost with the sale of my beloved 7D.  But again, having got a taste of low light focusing with the 6D & a fast prime,  IDK.  I may just have to keep waiting & walking around with my dated (but still satisfying) equipment-my 5D2 & 7D.  With a nice but also aging T2i (my loaner, fun/crazy camera) hoovering around in the background...

If anyone still monitoring this thread has an opinion, please let me know what you think.  Tks
« Last Edit: July 02, 2013, 08:07:32 PM by skfla »
still a 5D2 fan

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Re: Canon EOS 70D Spec List [CR3]
« Reply #327 on: July 02, 2013, 07:30:07 PM »

thelebaron

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Re: Canon EOS 70D Spec List [CR3]
« Reply #328 on: July 02, 2013, 08:15:52 PM »
well the 70d's -.5ev is the same as the 7d's. while i do remember having few stuggles with it in low light, it was usually when the resulting picture would be supremely noisy

neuroanatomist

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Re: Canon EOS 70D Spec List [CR3]
« Reply #329 on: July 02, 2013, 08:22:09 PM »
then,  outside of build quality and a few faster shots per second,  what advantage does the 7d mki have over the 70d?

None...until its specs are known.  But probably better standard phase AF, better sealing to go with the better build, perhaps better metering, definitely more C# modes, more MP, much better high ISO, time will tell...
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Re: Canon EOS 70D Spec List [CR3]
« Reply #329 on: July 02, 2013, 08:22:09 PM »