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Messages - sanj

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61
EOS Bodies / Re: Canon Confirms Development of High Megapixel Camera
« on: December 25, 2014, 05:41:35 AM »
Quote
The days of the annual product cycle are over, new models will come with big advancements in technology

I wonder what "big advancement" means in Canon terms? Is the 7D -> 7D2 an example of that?

:) :)

62
EOS Bodies / Re: More 7DII focus problems
« on: December 25, 2014, 02:53:04 AM »
Am I hearing it correct that 6D has better focusing ability than the 7D2?

The 6D manual has 10 pages for the AF system...
The 7D2 has 111 pages for the AF system.....

The 6D:
11 points
   Center: cross-type at f/5.6; vertical line-sensitive at f/2.8.
   Upper and lower AF points: vertical line-sensitive AF at f/5.6.
   Other AF points: Horizontal line-sensitive AF at f/5.6
   Center AF Point: EV -3 to 18
   Other AF points: EV +0.5 to 18
AF Point Selection
  (1) Automatic selection
  (2) Manual selection


The 7D2:
65-points
    all cross-type AF
    center AF point is a dual cross-type AF point at f/2.8
    EV 0-20
AF Point Selection
    (1) Single-point Spot AF (Manual selection)
    (2) Single-point AF (Manual selection)
    (3) AF point expansion (Manual selection, 4 points: Up, down, left, and right)
    (4) AF point expansion (Manual selection, surrounding 8 points)
    (5) Zone AF (Manual zone selection)
    (6) Large Zone AF (Manual zone selection)
    (7) Auto Selection 65-point AF


my vote is the 7D2....

FF bodies have generally had more accurate AF (in terms of inches or mm accuracy) than crop bodies.  They need it, because the depth of field on a FF can be a lot less. As I recall, AF accuracy is specified based on 1/3rd the depth of field up to f/2.8. 
 
The number of pages in a manual does not affect AF accuracy, there are no settings for it, its built into the size and spacing of the elements on the AF sensor.
 
The 7D MK II has a sophisticated AF system, and is much better at tracking subjects, has fast AF speed, and much better when focusing at off center points, but when comparing accuracy on the center point, I'd expect to see the 6D win because in in or cm, 1/3 the depth of field is a much smaller number on FF.
 
From TDP   http://www.the-digital-picture.com/Photography-Tips/Canon-EOS-DSLR-Autofocus-Explained.aspx
 
"Precision, invisibility, and other intangibles
As mentioned above with the precision discussion, there's a modified type of AF point called a 'high-precision' point, which focuses within 1/3 of the depth of focus of the lens at max aperture, vs. the normal precision spec of within 1 depth of focus. Usually, the high precision point is the center point, and it operates in high-precision mode with an f/2.8 lens on most bodies, or an f/4 lens on 1-series bodies. The 1D X is an exception in two ways - it has five high-precision points in a central vertical column, instead of just one, and they require f/2.8 unlike previous 1-series bodies. "

Is this had or have? And any links where I could read further on this pls?

63
Lenses / Re: Lens 'resolving power' vs sensors.
« on: December 25, 2014, 02:49:54 AM »
Thank you Jrista and the rest. But I must admit this is a steep learning curve for me.

64
EOS Bodies / Re: Canon Confirms Development of High Megapixel Camera
« on: December 24, 2014, 11:37:19 PM »

Who cares? Not me that's for sure... "not sure when but sometime in 2015", sorry, life is not never ending, I waited a long time and had hoped for the 5D Mark IV to be announced at Photokina, yet nothing and then in NYC in October, again, nothing.

I decided to go with Nikon and although I think they are putting products out too fast, at least there is something there worth having, there was no way I was about to drop almost 2k on a 5D Mark lll and I just got tired of waiting, sorry Canon, some indicator of when would have been nice but at this point, all there is as usual are rumours, meanwhile, I need a camera to actually get on with taking photos.


Why are you still here then?

Does that matter? He is perhaps just checking around what is going on with Canon. And face it, CR can be quite fun with a cup of coffee. :) I actually prefer broader spectrum of members/opinions to have different viewpoints for me to learn from.

65
Lenses / Re: Impressions from the EF 16-35mm f4 L IS USM
« on: December 24, 2014, 01:54:19 PM »
Rokinon 14mm f/2.8 is a full manual lens that you have to stop down to figure out the exposure.
Which again dims the viewfinder and you cannot really tell what is in focus and what is not.
The distortion is quite shocking as well. It is cheap, OK. I have it and I am still climbing the learning curve. I am not sure if I 'll keep it.

Rokinon is easy. Dial in F8, focus at 1m (3ft) and you're set. (Hyperfocal is <1 meter) No need to be able to tell if something is in focus or not, because everything will be.

For distortion, there's LR profile you can use. It doesn't make it great, but it helps. For the price, it's amazing lens.

Quote
It seems that the new 16-35 f/4 IS is optically superior to the f/2.8 lens. The IS gives you two apertures that can help you get your shot –unless the subject is moving, of course.  Do you actually buy lenses because they are 'cool' or was that a joke?

Anyone who considers himself (/herself) a photographer, should only buy 2.8 or faster. You can easily spot the amateurs carrying the F4s around.

You make a fool of yourself when you write crap like that. Sorry to put it so bluntly.

66
EOS Bodies / Re: More 7DII focus problems
« on: December 24, 2014, 01:19:53 PM »
Am I hearing it correct that 6D has better focusing ability than the 7D2?

Yes, the 6D is better...but still unusable.   Only the T2i and EOS M can accurately autofocus, apparently.  At least in the 'right' hands...

As they say in American movies: "Houston we have a problem."

67
EOS Bodies - For Stills / Re: Just picked up a 7D
« on: December 24, 2014, 08:45:46 AM »
You do not necessarily need L glass. There are several nice non L lenses from Canon and other companies.

68
EOS Bodies / Re: More 7DII focus problems
« on: December 24, 2014, 08:18:52 AM »
Am I hearing it correct that 6D has better focusing ability than the 7D2?

69
Lenses / Re: Which Canon Full Frame Camera is For You?
« on: December 23, 2014, 01:19:57 AM »
I am a full time working pro and have seen no compelling reason to move from my seven year old 1Ds MkIII's. I'd love the high iso capabilities in the newer bodies but have managed to live without them for the last thirty years, same with the five group RT flash system, even the castrated pre 2012 version works plenty good enough.

Actually those 1Ds MkIII's have proven to be the best value for money cameras I ever bought when compared on a cost per image basis.

I know of several other professionals like you! :)

70
EOS Bodies / Re: Ron Martinsen Blasts the 7DII in his review
« on: December 21, 2014, 02:28:52 PM »
I happen to be friends with Ron and have worked with him for some time.  While I do not always agree with his reviews, he's pretty straight up.  One thing is he has always stated what he thought about products - even when it wound up pissing off his sponsors.  Keep in mind that the majority of big review sites out there have to temper their disappointments in order to not suffer financially.

In terms of his review on the 7D2, I happen to agree with it. \

so you recommend that someone who is not using the 7D MK II for wildlife or sports buy a D4s?  A D4s won't do sports or wildlife?  What is he on??

From his review I gather that he is recommending the 1D4 over the 7D2.  As a primary camera this makes sense.  Personally this is one area where I do not agree.  I find a 5D3 + 7D2 to be a better combination.

In terms of the D4s I know he loves this camera because he found the AF to be superior to the 1Dx in his review.  That being said he is a Canon shooter.  This is one area where I do not entirely agree with him.  Personally for wildlife I cannot justify the price difference of the 1Dx over the 5D3.

Personally I can. Absolutely.

71
EOS Bodies - For Stills / Re: Anything wrong with mRAW or sRAW
« on: December 21, 2014, 12:47:23 PM »
With all this talk of a possible 50mp camera I am starting to think how I would utilize a camera like that for my work (mostly weddings).  I would definitely not mind having access to 50mp for portraits, but for other aspects of the wedding day, like shots at the reception, it would probably be my preference to switch to mRAW which with a 50mp sensor would be what? Around 20mp?  However, I have never used those formats and am wondering how much, if any, IQ you loose from compressing the image in camera like that?

I believe nothing is wrong with mRAW or sRAW as long as you realize that the large prints will not be as good as full RAW. And you not be able to crop successfully.

72
Thank you so much for this.

73
EOS Bodies - For Stills / Re: I'm getting impatient for the new 5D 4.
« on: December 18, 2014, 10:27:10 PM »
Seriously, soon enough all this talk of "you need f/2.8 to stop motion" is going the way of the dodo.

No, it won't. In times of the original 5d1, you needed f2.8 to stop motion. In times of the 5d2, you needed f2.8 to stop motion. In times of the 5d3., you need f2.8 to stop motion. In times of the 5d4, you will need f2.8 to stop motion. Get the picture?

Wait, there is a MASSIVE difference in image quality between the 5DII and 5DII?! Since when?

Who said anything about massive? But it's significant: The 5d2's images respond not as well to denoising, and the noise pattern is visually more disturbing. Then there's a slight increase in snr, and some less banding (while not at 6d or 1dx level).

But if used properly, this won't matter as you can create visually stunning images with the ff 5d2 - there's no real need for the 5d3 features if you shoot the 5d2 with the purpose in mind it was designed for.

If the subject moves relatively fast you need 1/250 shutter. If it movies fast you need 1/1000 and if it moves relatively really fast 1/4000. If you notice f stop is not mentioned here. Get the picture?

So yes, as cameras become noise free at high ISO, f2.8 will not really be required to stop motion unless light drops considerably.

74
EOS Bodies - For Stills / Re: I'm getting impatient for the new 5D 4.
« on: December 17, 2014, 12:27:38 PM »
What are you even shooting?

Pick up a 5D MK II, you can probably get a decent shape one for $1200, it still takes great pictures, is full frame if/and the 5D MK IV gets announced in the next quarter or so, you sell of the 5D MK II, maybe take a $100 - $150 hit or so, you will be more familiar with the 5D and easier to step in.

As well, what if the 5D MK IV is a $3500 - $4000 camera?  are you prepared for possibly those prices. 

Cameras are an expense, not an investment.  You buy wisely, you have a lower expense.  I would rather be shooting for 3 - 5 months for $20 - $30 a month on a full frame than just waitinfg

So true

75
Thx Tron.

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