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What is the difference between "good" AF and "bad" AF?

briansquibb said:
No one claims it is a pro AF but with a f/2.8 lens that centre point is still the best in low light

Perhaps...but I was in an aquarium last weekend, and while ISO 3200 - 6400 were sufficient for the shots, the AF (center point) was struggling to achieve lock much of the time (and that was with a 35mm f/1.4L).

mcintoshi said:
...like many people I set the centre AF point and then when shooting I focus, then recompose, then release the shutter.

Most of the time that does work fine, with a slow lens. But if you're shooting a fast lens (f/2 and wider) at wide aperture, focus-recompose will result in out of focus shots, simply due to geometry (the sensor is flat, the lens field is flat, ideally at any rate, and you're moving the camera in an arc when you recompose).
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If 5d3 really is 22Mp, what will low light (ISO) performance likely be?

Radiating said:
I think your technical understanding of photography is off the mark, to say the least.

Noise improvements happen from two areas, noise reduction and sensor technology. Seeing as you can just apply the latest noise reduction to any raw file the advantage doesn't go to any camera in this regard.

To give you the simple answer no the camera will not deliver 2 more stops of noise.

In fact in 9 years since the earliest days of DSLR's Canon has only increased sensor sensitivity by a QUARTER stop. To give you an idea of how off the charts what you're asking is, not only would it be 16 times the improvement Canon is used to delivering, it is actually against the laws of physics to improve the current 5D II 2 stops at the sensor level. The current 5D gathers 33% of the light that hits it. 2 stops would mean that the camera gathers more photons than actually exist. The camera would have to create more energy than it takes in which is along the realm of perpetual motion machines. Perhaps in the 5D Mark 1,003 but not the 5D mark 3.

It's worth mentioning though that Canon has let their sensors drift behind the field in terms of noise. So the 5D III is poised to have a massive 0.25 stop to 1 stop increase in noise handling, most likely a 0.33 stops or 0.5 stops to catch up to current standards. This sort of leap is considered the equivalent of going from air travel to space travel so it's a big deal and will be the biggest improvement that Canon has ever done in noise from one generation to another largely thanks to pressure from Nikon which has made extreme leaps in noise handling. Canon has already caught up the rest of their line to Nikon which has been done in smaller jumps thanks to a shorter life cycle so a leap of this magnitude is very likely.

So yes while the 5D II > 5D III noise won't meet your standards for being worth it, it will likely be the biggest improvement in a single generation that ever has or will happen.

As far as JPG's go you can expect 2 stops though as Canon implements revolutionary new noise reduction algorithms which have been available in only photoshop plug-ins so far.

Ill agree with you, however since my 5DM2 takes to noisy pictures at 12800 and above I would consider it as I got more iso in the new one if the quality would be the same as one lower iso in the old one, even if that could be tributed to better noise handling in the sensor reading (RAW) (SNR handling in sensor and noise reduction in post should be diffrent teqniques as I see it).

So next one probobly would have some aditional steps vs the "old" mk2 but as we all know the upper steps are not so good looking. But I wouldn't be suprised if we saw a H2 of 102400 if it would be usefull is another topic.

To be able to lift the shadows more than the mk2 would be good, but even if the mk2 gets critisized for this its relly is a wonderful camera. More DR is not a bad thing so hopefully we will see just that in the new mk3
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If there's no 5D3 Friday...

kidnaper said:
Will you still buy something? What I mean by that, I currently have about 2,400 set aside for the new camera and should be able to fully pay it off sometime in April but if there is no Full Frame camera announced I'm thinking I'll pick up the 34L and start building back up my camera fund.
I don't need a new body, and I've been planning to go FF for quite some time now but the nerd in me won't let me get a nearly 4 year old camera with the new one being so close.

So, if there's no 5D3 this week what, if anything, will you pick up to appease your burning pockets?

Keep waiting. I mean why would I toss $3500 on I don't even know what? A couple more 7Ds? Why? What else is there to do but wait.
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Turn off....or leave on

I found twice, that leaving camera ON in a backpack caused battery completely out because of accidently pushed buttons when it was carried. Currently - after shooting I switch it off. I don't have enough spare place in backpack and afraid, that accidently pushed buttons (shutter or lifeview) can make also IS working unnecessery, which could again be a bit unhealthy for lens, when it's in a trunk or carried by me. So by me - when shooting always ON, but after shooting - always OFF.
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EOS 5D Mark III User Group created on Vimeo/Facebook/Twitter

[size=12pt]Leaving this forum as the central place to continue these discussions, I wanted to introduce you to a supplemental place that targets specifically the EOS 5D Mark III that will launch this Friday, focusing on its video functionality for filmmakers. This is built upon the success of several other communities, including most recently the Cinema EOS C300 at http://cinema-eos.info, that integrate video samples with social media feeds.

http://canonhd.info (join the group at Vimeo)
http://facebook.com/eos5DmkIII (like the Page at Facebook)
http://twitter.com/eos5DmkIII (follow the feed at Twitter)

Looking forward to sharing more information and actual working samples when this product drops!
[/size]

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DPreview Nikon D800 D4 what the professionals think

So the link is for a bunch of pros who don't have any hands-on shooting time with either body merely speculating on how they will perform. You can get that kind of speculating right here on Canon Rumors :)

BTW, does anyone really care what pros think? There are some pros with highly impressive resumes right on this forum whose thoughts I greatly respect, but they seem to get flamed for expressing their opinions most of the time.
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Noise on a 5D vs T2i

I too own a 5Dc and a 7D and I am planning to get a 5D3 once the dust settles down providing the reviews are favorable.
First of all because of the FF. From what I shoot, the lack of crop suits me better. Secondly, while at low ISOs, the 5Dc is hands down better than the 7D, at higher ISOs they behave fairly the same but both perform worse that the 5DIIs that I rent from time to time. Thirdly, the response time and operation lag of the 5Dc feels almost painful in comparison to the newer cameras.
But having said that, I still LOVE the images that the 5Dc produces and for me an upgrade will more of a convenience rather than necessity. And heck, there is also the 5DII that if it will drop in price will be one hell of a perform for the money. Both new and on the used market.
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Selling 5D mk ll. Reasonable price?

elflord said:
SiliconVoid said:
I don't mean to be the proverbial rain on the parade... but the best answer to your inquiry IS what someone wants to pay for it.

Not quite. The market clearing price is the price for which the number of willing sellers is equal to the number of willing buyers (where supply and demand curves cross).

The fact that some might not be willing to cough up $1800 (or $180 for that matter) for that body does not mean that he has to sell it at that price.

Any pricing you have seen in the past for the 5DmkII, or see now, has no significance - they are for a used 'current model'. After the new model is announced the resale value will decline noticeably on used, and will likely steadily decline on the remaining new inventory until they are gone.

The announcement could affect supply demand, we can speculate on how this will play out. It will depend to a large extent on pricing of the new version.

I don't think 1500-1600 sounds right -- not consistent with completed transactions I see in the used market right now.

I'd say it actually has less to do with the new model announcement and more to do with the new price dropping. Of course, it looks like both will happen at once. Right now it's totally a sellers market on the mkii, as people are holding them until the mkiii is actually available (your not going to sell your backup body if you don't know when you'll actually have a replacement!).

Another factor is inventory, we don't know how many mkii's canon has kicking around, and, we don't know if canon plans on keeping the mkii around as a cheaper entry point to FF ($2000 to go FF, that may entice people on the fence, and if they do go FF at the $2000 price point they may very well upgrade to the mkiii within a year).

As one of the people on the hunt for a lower priced mkii - this is what is on my mind - supply and demand. If i had bought a used mkii in december I could theoretically resell it today for no loss, maybe even a profit given the scarcity in the market. ROI - would I actually make more money in the coming season if i had FF now. availability - if the mkiii isn't actually available until fall, what does that do to the used market? I don't want to spend $1900 on a used body, especially if that same body will be market corrected down to $1700 in a few months. And likewise, I don't want to spend $1900 on a used body if the new price is going to drop to $2100...

Also, and this may effect the pricing - buying a used body from a person as opposed to B&H ---I'd be more inclined to spend $1900 from the likes of B&H because they have a good and proven track record with warranty (3 months on used, and you can opt to upgrade the warranty). I'd be vary worried about making a personal sale on a used body for that much, unless I personally knew the seller...
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What is the latest for the 7Dmkii/70D?

jrista said:
tooslick2k said:
x-vision said:
I have a very strong feeling that we won’t see a 7DII.

i agree... i think the 7D line is dead if the 5Dmk3 specs are true. ;D

Does everyone forget crop factor? The 5D III may be intriguing with its 61pt AF, assuming it has 7fps (if it turns out to be 4.5fps, its a damn shame and a waste of 61 AF points!), but its still full-frame. You lose a LOT of reach with full frame, and that necessitates vastly more expensive lenses to achieve the same reach (sometimes including a TC.) Slapping on a TC often pushes aperture past f/5.6, which then necessitates a 1D series body (which these days is only the 1D IV, which lists $5999.) Thats nothing to say of continuous frames, which at higher MP is going to be limited...with a 600x CF card my 7D pumps out 23-24 continuous frames at 8fps. I'd be surprised to see a higher resolution 22mp sensor achieve the same.

The 5D III is not a slam-dunk replacement for the 7D, especially at a price tag of $3500. Assuming street was as cheap as $3000, the 7D with its cropped sensor, weather sealing, pro-grade qualifications and $1400 street price still sits very pretty in Canon's lineup. When it comes to wildlife and bird photography, I won't be ditching my 7D for a 5D III on March 2nd...I need my reach!

The XXD line in Canon's lineup has never been considered a pro-grade body either. The uber shakeup of Canon's pro line doesn't quite seem to be materializing as some speculated, if the photos of an actual 5D Mark III are indeed real (they certainly look it.) There does not appear to be a merger of the 5D III and 7D II into the 5D X. That makes me skeptical that a 70D would suddenly become a pro-grade body with proper weather sealing, extensive pro features and body buttons, etc.

It's certainly a possibility, but I don't think the 7D is completely dead yet. You have to figure Canon has been working on the 1D X and 5D III for years as well...I'd imagine the 5D III R&D began shortly after the 5D II was released some three years ago. Why would they release the 7D in the interim, only to kill that brand new line of pro-grade bodies off a couple years later?

Elimination of the 7D just doesn't add up entirely yet...not at this stage in Canon's timeline.

+1... i agree...

There is a market for cropped pro-grade camera... I have a freind who buys Oly just for the reach a 2x crop factor gives him... The fact the 7D has been sooo popular surely says a lot and Canon would be fools to ignore this obvious demand! I see room for the 7D mkII in the line up.

People are complaining that the cropped market is too tights... this is also a marketing tactic... "for just xxx$ more you can get the next model up". if the gap is too much between models it doesn't entice as much...

just my thoughts

bring on the nexted xxD/xD cropped! :)
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What happened to the DO lenses?

I own and enjoy using a 400/4DO...

It's lighter than a 300/2.8, it's sharp, the bokeh is quite fine (imo it's better than the 70-200 / 2.8 Mk II) and it takes a 1.4x tc really well. Another plus is that inside or outside focus, it has absolutely zero chromatic aberration - you cannot do this with a conventional lens.

Now it's not the equivalent of a 400/2.8 but neither is it $12k or whatever insane price is being asked. The IS is fairly rudimentary by current standards, so that could do with some work. It's also damn expensive - which is why I suspect it never really took off.

I did play with the 70-300 DO and was completely underwhelmed. The build quality is poor in comparison with the 70-300 L (which recently has sold for a similar price.) I've seen reports of inconsistent image quality over the zoom range - I observed this in the one I played with.

If memory serves, Canon recently was awarded patents for a 200/2 DO and maybe a 600/4. It strikes me that DO is one way to eliminate coloured bokeh in fast lenses... so one of these years they may be all we can buy.
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