May 24, 2013, 03:35:31 AM

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### Messages - Autocall

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16
##### EOS Bodies - For Stills / Re: How to disable the focus on shutter button on the 5D MkIII if depressed halfway
« on: March 27, 2012, 11:47:14 AM »
Here's an article on Canon DLC RE: "back-button autofocus explained".
http://www.learn.usa.canon.com/resources/articles/2011/backbutton_af_article.shtml

KARMA +10!!!
what a prolific day...

17
##### Lenses / Re: Patent: Canon EF 2.8x Teleconverter
« on: March 27, 2012, 11:33:57 AM »
<p><strong>Canon’s patent</strong></p>
<li>When doubled, twice the lateral aberration, longitudinal aberration is 4 times greater rate of expansion, because the F-number is also double, longitudinal aberration is twice per depth of focus</li>

I read that as it, like the 2X, adds two stops. So a 2.8 lens -> 5.6, not 8.

you've read wrong: you loose 2 stops with the 1.4 converter, and tree stops with the 2.0 .
this means 4 stops with the 2.8

I'm sorry you're not right - you loose 1 stop with 1.4 and two stops with 2.0. Assume you have 400mm f4. It means a hole is 100mm wide (400/100). If you add 1.4 TC, you have 560mm. So it becomes 560/100 = f5.6 and  f4 -> f5.6 = 1 stop. Calculate it with TC 2.0 and TC2.8 accordingly and you will find it.

yeap, you're right.
sorry

I love how you fight about "stops" dudes ... bit of a clue : take F/2,8 or F/4,0 or whatever indeed and just multiply by the number on the extender ... magic

Wow, how did you do that? That's really a case for Penn & Teller

apart from the relatively simple ratios, I was concerned by the loss due to the additional elements.
( a polarizing filter doesn't change the focal but causes 1 full stop loss for example)

18
##### Lenses / Re: Patent: Canon EF 2.8x Teleconverter
« on: March 27, 2012, 10:59:32 AM »
<p><strong>Canon’s patent</strong></p>
<li>When doubled, twice the lateral aberration, longitudinal aberration is 4 times greater rate of expansion, because the F-number is also double, longitudinal aberration is twice per depth of focus</li>

I read that as it, like the 2X, adds two stops. So a 2.8 lens -> 5.6, not 8.

you've read wrong: you loose 2 stops with the 1.4 converter, and tree stops with the 2.0 .
this means 4 stops with the 2.8

I'm sorry you're not right - you loose 1 stop with 1.4 and two stops with 2.0. Assume you have 400mm f4. It means a hole is 100mm wide (400/100). If you add 1.4 TC, you have 560mm. So it becomes 560/100 = f5.6 and  f4 -> f5.6 = 1 stop. Calculate it with TC 2.0 and TC2.8 accordingly and you will find it.

yeap, you're right.
sorry

19
##### Lenses / Re: Patent: Canon EF 2.8x Teleconverter
« on: March 27, 2012, 10:39:13 AM »
<p><strong>Canon’s patent</strong></p>
<li>When doubled, twice the lateral aberration, longitudinal aberration is 4 times greater rate of expansion, because the F-number is also double, longitudinal aberration is twice per depth of focus</li>

I read that as it, like the 2X, adds two stops. So a 2.8 lens -> 5.6, not 8.

you've read wrong: you loose 2 stops with the 1.4 converter, and tree stops with the 2.0 .
this means 4 stops with the 2.8

20
##### EOS Bodies - For Stills / Re: How to disable the focus on shutter button on the 5D MkIII if depressed halfway
« on: March 27, 2012, 04:17:16 AM »
C. Fn 2, Custom Controls, set the first option (shutter button) to either "Metering Start" or "AE Lock".

This was among the very first things I did to the 5D3 when it arrived. The whole point of back-button focus is to separate the focusing from the shutter activation. The AE Lock (on shutter half-press) is handy when shooting Av/Tv because you can focus on one point, meter on another, recompose, and activate the shutter independently. Total control.

Edit:  I just saw how Canon chose to abbreviate the setting name.. "Shutter Butt. half-press". Really, Canon? There's no other way to abbreviate "button"?

wow! +5 karma

21
##### EOS Bodies - For Stills / Re: Defective 5D MK III.....
« on: March 22, 2012, 04:54:55 PM »
are you aware that you should first press the shutter button halfway before pushing it down completely?
jpeg samples, png savings,
come on...

22
##### EOS Bodies / Re: Why I think the 5D mkIII suits landscape photographers
« on: March 07, 2012, 04:17:53 AM »
Still be people not shooting panoramics for wide landscapes?
I understand that high-end Studio photography eventually still needs medium format but why the hell wouldn't the mk III be suited for landscapes?

23
##### Lenses / Re: Canon 50/1.4 focusing
« on: March 06, 2012, 04:33:26 AM »
here is an extract of the best review of this lens in my op.
hope it helps
Although it is soft wide open, the Canon EF 50mm f/1.4 USM Lens is sharp at f/2 and very sharp when stopped down to f/2.8 or narrower. Corners are soft until f/2 for 1.6x FOVCF bodies and f/2.8 on full frame bodies. Strong halation is present at f/1.4 (a soft, dreamy look) with some CA (Chromatic Aberration). Colors and contrast (after the halation diminishes at f/2 or so) are very nice. The 50 f/1.4's 8-blade aperture creates a good foreground/background blur quality. Light fall-off is noticeable through f/2 on a Full Frame body, When mounted on a 1.6x FOVCF body, light fall-off is noticeable only through f/1.6 or so. My exposures with this lens run about 1/3 stop brighter than with most of my other lenses.

from
http://www.the-digital-picture.com/Reviews/Canon-EF-50mm-f-1.4-USM-Lens-Review.aspx

24
##### EOS Bodies / Re: Introducing the Canon 5D Mark III
« on: March 02, 2012, 05:56:15 AM »
Very happy after several years of waiting but why did they not put in a rotating back display???

fortunately not!
thank God...

25
##### EOS Bodies / Re: What is the new 5d3 Groundbreaking Feature that will shake the industry?
« on: March 01, 2012, 11:02:13 AM »
New generation Eye-controlled Autofocus

26
##### EOS Bodies / Re: 5D Mark III Full Spec List?
« on: March 01, 2012, 08:42:54 AM »
Anybody noted the mention INTELLIGENT viewfinder?
THIS is the groundbreaking feature that will shake the industry that they were talking about.
I know that this is not a inedited technology but I bet that i will have nothing to do with what have been done in the past!!
The optical TTL focus IS the feature that will hurt Nikon the most.

27
##### EOS Bodies / Re: NO 5dM3 On Friday * CONFIRMED By a canon Rep Today
« on: February 29, 2012, 05:52:56 AM »
according to this video and cr guy , it seems they are pretty confident about the 5D3 release..lets wait 2 more days ..

http://www.phototips.biz/2012/02/phototips-canonrumors-live-cast.html

from the website -
"..I believe their will be a special feature of this camera that has the potential to change our industry.."

EYE-CONTROLED FOCUS.
who wants to bet?

28
##### EOS Bodies / confirmation of 5D mkIII announcement date from a belgian vendor
« on: February 29, 2012, 04:53:28 AM »
Je vous confirme que Vendredi 2 Mars Canon fera son annonce du nouveau 5DMKIII

Quelques caractéristiques:

22 Millions de Pixels
6 images /sec
Batterie LP-E6
Nouvel AF plus rapide
Diverses améliorations dans la video

Prix: +/- 3250 €

From Baylyns (founder) on:

transl:
I confirm that Friday, March 2 Canon will make his announcement of the new 5DMKIII

Some features:

22 Million Pixels
6 frames / sec
Battery LP-E6
New AF faster
Various improvements in the video

Price: + / - 3250 €

29
##### EOS Bodies / Re: The Next 5D on February 27/28, 2012 [CR3]
« on: February 25, 2012, 11:34:50 AM »
absolutely NO mention is made about the sensor' size in the specs.
Could very well be the 7D II.
Anyone think the same?

absolutely NO mention of it being a camera in the specs.   Could very well be a waffle maker.
Anyone think the same?