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D4 sensor scores available at DxO

Does anyone actually really know how DXO gets their dynamic range numbers?

Their description under their methods of analysis is pretty vague...

I find it incredibly suspicious that I get the same numbers they get (within like 1 or 2 tenths of a decimal) when I take black (underexposed to the point of completely clipped) & white (overexposed to the point of completely clipped) files from a 5DII, a S100, or a Nikon D7000, & do the following calculation:

Dynamic Range = log[base 2] (max pixel value in white file/standard deviation of pixels in black file)

I have asked this in previous threads so, apologies in advance for that. Just not getting much feedback as to what people think of this calculations, which I've seen on this forum as well as on dpreview's fora.
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Sigma new 105mm macro better than canon 100L macro ?

JR said:
If you look at the chart, the Sigma maybe has the edge (a small one) wide open at f2.8 but as soon as stop down to even f3.2 or f4.0 the Canon L Macro actually seem better 0 to my eye anyway.

Am sure they perform both very well in real life situation however.

Agreed, there is a slight edge wide open, but the Canon smashes the Sigma stopped down. It's a shame because it could have been a great bargain.
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Stacking TC - samples

I see the IQ degradation toward the edges, however, I have no problems using the TC's with my 70-200mm f/4 L, it takes them pretty well.

Being a crop camera, it only gets the center part of the image, so that helps

These were taken using AF and hand held. IS was on.

70-200mm f/4L IS 1.4X TC and 1D MK III

814931712_37iMo-L.jpg




70-200mm f/4 L IS 2X TC on 1D MK III

814932356_wQ4M4-L.jpg





70-200mm f/4 L IS 1.4X + 2X TC on 1D MK III


814931505_fP3vV-XL.jpg
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The anti-extension tube: EF-S adapter for EF lenses

Stephen Melvin said:
As an aside; that's exactly how Olympus makes their 35-100 f/2.0 lens. It's optically a 70-200 f/2.8 with a .5x converter built-in. In theory, it should be a 35-100 f/1.4 -- it's certainly as big, heavy and as expensive as one.

Thanks. This is exactly what I was looking for. It is possible and some is doing it, though not in a universal sense.
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1D Mark IV versus 5D3

Re: 1d mk iv or 5d mkiii?

WillShootPhotos said:
AllGold said:
What's both sad and funny is the price of those 600EXs are starting to approach Speed-o-tron, Elinchrom, or Dynalite prices--and have already hit White Lightning/Alien Bee prices--but with only a small fraction of the power.

Personally, I can't see using a WL or AB mounted to a hot shoe while on the back of a motorcycle in the middle of a pro bicycle race... ;) ;D

- Will

here you go chase them around with this
Human Light Suit: Burning Man 2010
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wide angle lens with IS

dr croubie said:
scottsdaleriots said:
Why canon decided it was a good idea to put IS in those two wide angle lenses I don't know nor can I find a logic reason which makes much sense to me.

I'm guessing video.

Yes, Chuck Westfall and others said that these are lenses that take video users into account. Most new Canon lenses are going to be ore video friendly.
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No RC-6 love for 1 series bodies?

kaz said:
The text in that image is Chinese... In any case, yeah, that also says "self timer lamp." :'(

I really don't understand why Canon doesn't add this feature, as they did in their lower bodies. It's not even an issue of cost. I just don't want extra bulk for a feature that seems so obviously useful.

I use Canon's (also expensive) cable timer shutter release, and although it works well, the cable gets tangled in the tripod and is very inconvenient. The cable also doesn't help if you want to be in the shot and carefully time it. What's the big deal about adding this simple feature, Canon!?!?

Kaz

You can probably find a wireless remote release for it from China for like $12.
I got one for my 5D2 and it's worked without issue.
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L lens for 5d MK III

Kernuak said:
april said:
facedodge said:
amgc32 said:
Im basically going to shoot mostly portraits, street photography, landscape

135mm f/2.0L is only $1050 USD. It is considered one of the fastest and sharpest lenses you can get. It has 9 blades and delivers bokeh much like an 85L. The AF is nearly light speed. The reason you get all this is because it's 16 years old. Somehow, they hit is out of the park in 1996. Despite this, the 135L probably won't be updated anytime soon.

yes I understand your point as a matter of fact there are a lot of times that I use my 70-200mm for landscape shots and it's great but the point is we're just giving ideas to the OP on the basis of his current situation. As I understand he's asking for a versatile L-lens to cover his shooting needs which in turn is limited by a tight budget.
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Canon most popular brand

PhilDrinkwater said:
Neeneko said:
The thing is, 'consumers' are not the only market out there, and many of the people who are upset at the 5D3 fall outside that demographic and feel like Canon has really focused on what 'consumers' want and professionals (or other markets) are only getting what overlaps with the mass market.

Really? I'm honestly surprised to hear that:
* Dual cards
* Pro AF
* Improved weather sealing
* More FPS
* EC +/- 5 stops
* Improvement to focus microadjust
* Reduction in shutter lag
* Viewfinder improvement
* X-sync improvement
* Silent mode shooting

These are pro features, especially the AF.

Understand that the 5d3 isn't what everyone wanted, but the one thing I don't think can be claimed is this was was a camera for consumers. Consumers would generally not want a pro AF but would likely want more MP. Not saying the pro market doesn't want more MP either, but if they were going for the consumer market I have no doubt MP would have increased since consumers with 5dii's would look at the 5diii as no real improvement for them.

Its alot closer to what I wanted than the 1Dx was!

now if they had made a gripless version 1Dx....
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Just called Canon... (5dm3)

My local store insists that they are getting them the 21st. They claim they will be the first. But then again we have reports of a few people with them in hand and some really small mom&pops having sold out already. It seems there is total confusion. Usually they do sort of trickle out, some small stores get them first, then some medium-sized and then the big ones and then Amazon, that is how it's been recently.
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New Digital Photo Professional Software DPP Versions 3.11.20 and 3.4?

I heard today from people with close contact to Canon that a new version of DPP will be published with the final sales release of the 5D Mark III: DPP version 3.11.20.
Shall include HDR functionality for the first time.

By end of 2012 DPP version 3.4 will appear on the market, trying to deliver the same functionality as capture one software.

Nikon D800 price drops £300 on Amazon UK...and 5dmk3?

from nikonrumors:
Here it is again - the price of the Nikon D800 dropped £300 (around $480) on Amazon UK. Not sure if this is a mistake or a special offer, but the same price drop happened also few days ago and then it went back to £2,399.99.
Update: the Nikon D800 price on Amazon Italy also dropped with EUR 400 to EUR 2.525,16.
(vat included)

...and 5dmk3 ?...canon no drop?

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