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Messages - TAF

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61
EOS Bodies / Re: Moire in the 1DX and 5D3
« on: June 18, 2013, 10:57:52 PM »

The lens is oversampling the sensor.


I'm afraid I don't understand this statement.  A lens is an analog device; I don't see how it can "sample" anything.

Ideally, it provides a perfect image focused upon the sensor - that's the goal, is it not?  At worst, the image has lost some resolution, and perhaps has some aberrations introduced.  But moire isn't either of these two effects.  As the respondent below pointed out, you never see this sort of thing with film (an analog media).

So I would assume it is a byproduct of the way the system samples the sensor array and merges the four color pixels into one.  But the lens has nothing to do with that, unless you are suggesting that there is something inherent to the performance of the lens that causes this effect when the sensor samples.

Would you please explain this (or point me to a reference that does)?

Thank you.


62
EOS Bodies / Re: A Big Megapixel Discussion
« on: June 13, 2013, 09:31:50 PM »

And someone was speculating about 102k native ISO. Would be great! Waiting for that. Maybe in about 6 years from now via the 5DV? 102 k like my 25k on the 5D3...wow.   8)

That was me; high ISO was why I bought the 5D3 (the 1DX was out of scope both due to money and physical size), and I really look forward to the next improvement in the ISO department.  Rather like the jump from pushed Tri-X at 1600 to 2475 Recording Film pushed to 6400 and IR film with a filtered flash; there is no going back.

Having always been an 'available light' photographer, complete with the limitations that implied in the past, I am loving the stuff I get from the 5D3.  But of course I want 'more', and I know it's coming.

After all, that's how these suppliers of photographic crack stay in business.

63
Re: What would you do if you had $2000, a 5DII and no lenses?

Be both very sad and very excited?  After all, a body without a lens is like frying pan without a stove.  It may have some alternative use, but for its main purpose in life...

I would buy a 24-105L, put the remaining $1300 in the bank, and start taking pictures.  After say 6 months, you'll know if you need for your next lens to be a telephoto lens or a wide angle one.

If you need a wide one, buy the 17-40L, and you'll still have $600 for something else.  If you need a longer one, I'd recommend the 70-300L IS, which will be about it (you might even need a few dollars more).

As I've posted before, my order of priority was:

24-105L
70-300L
40 pancake
50 f1.4 Zeiss

and next on the agenda is either the 17-40L or the 16-35L MkII, then a 100 macro L

But that's just me  :)


64
EOS Bodies / Re: A Big Megapixel Discussion
« on: June 12, 2013, 10:47:30 PM »
Either 34.56mp (4800x7200) or 56.62mp (6144x9216; extra credit for seeing why I chose the latter numbers).

1920*3=5760

5760*1.6(crop)=9216

So it's the same pixel density as a 1.6 crop sensor with three horizontal pixels per output horizontal pixel in full HD video mode.

Fascinating.  That was not what I was looking at at all.

I was thinking 256 pixels per mm (vice 200 pixels per mm for the 7200).  I like your answer better.  Well done.


65
EOS Bodies / Re: A Big Megapixel Discussion
« on: June 11, 2013, 09:36:17 PM »
OK, if they really want to impress everyone:

Either 34.56mp (4800x7200) or 56.62mp (6144x9216; extra credit for seeing why I chose the latter numbers).

ISO native to 102K (H2 is 408K); 12fps (24fps with the optional pellical mirror); Dual or Triple DIGIC 6 as required; high speed video mode (640x480 at 4800 fps).

Modified 1D body with dual battery compartments and built in thermoelectric cooler.

Less than 1 million yen.

I'd save up for that.

If they build it as a mirrorless at 750K yen, I might think about it.  And make those Leica folks jealous.

66
Software & Accessories / Re: New Macpro teased at Mac Conference
« on: June 10, 2013, 05:57:29 PM »
My Impression was $$,$$$
Sounds impressive though.  The tube shape might be optimal for cooling.

No, just $,$$$ :-)

If they are consistent, it will be between $3,000 and $4,000.

I wonder if this is the first product that will be made in Foxconn's new Detroit factory?


67
Seems like this would be fairly straightforward.

With the 5D3, one can take a still while shooting video.  I don't believe the shutter curtains move during this (I just tried it, and while watching through the lens saw no movement), so it would seem the camera uses an electronic shutter in that mode of operation.

All that would be required would be to actuate the hot shoe.

And that would be very useful indeed.


68

The problem of durability could be solved by exchangeable sensors. Would be good idea just with CMOS sensors - I would like to convert my 20D to a B/W camera by removing the RGB Bayer pattern (and increase the sensitivity by a factor of two or three) but would like to have the chance to try the removal procedure on two or three sensors (not cameras).

I've wondered the same thing, so I have to ask - is that even possible?  It would certainly be a fascinating thing to experiment with.

Since the Bayer filter is right on the chip, I'm guessing one would need a clean room and some very exotic micromanipulators.  But even then, how does the software in the camera respond?  Would the nice people at Magic Lantern need to provide some new firmware to make things work?

If possible, it would be cheaper than a Leica, even if you started with a new Canon...

69

And then covered anything with Canon, the Mark III emblem, etc.  For added magic, I put a crappy tan masking tape on top of that in a few places.  And then I decided Kai Wong needed to make an appearance.

The final product is attached.  Fun.

The ugliest 5D3 ever?  You decide.

- A

You were doing fine right up to the point where you added the colorful stuff.  The goal is stealth; adding bright colors is rather counterproductive.  In other words, loose the stamps and pictures and stick with black


70
Technical Support / Re: 5dm3 - FPS Drops when battery below 50%
« on: May 25, 2013, 08:34:55 PM »

Mostly on the wedding scene, so it's nice to run the battery's down over a couple days shooting. Otherwise you start with good FPS, then halfway through the shoot it drops. =/


Why do you think it is nice to run the batteries down?  It isn't.  Li-Ion batteries are better off being used partially and then recharged.  These aren't the olden days of NiCd's.

See Table 2 at:
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries

Sounds to me like you just need to keep some spare charged batteries on hand, and swap them out when you notice the speed drop.

I'll have to try and see if I have the same experience - I normally never let my batteries fall below 50% so as to maximize lifetime and to ensure that UI never run out of power at an inopertune moment, so it will be a new experience.


71
Lenses / Re: Poll: Most Wanted New Lenses of 2013.
« on: May 14, 2013, 07:08:30 PM »
I want a lens that does not yet exist. I would like a 24-135 f1.4-f2.8 L with IS. Preferably less than 800 grams; black, not white; and using a 77mm filter.

That would be my perfect walkabout lens (the the perfect kit lens).  The 24-105L is really nice, but I wish it were faster.  I've finally come to appreciate the advantage of the faster lens with the 5D3 AF system.

I also like the idea of a modest-range walkaround lens. Longer reach than 70mm, but not going crazy like the 28-300mm to reduce distortion and keep size/weight reasonable. However, I think this one sabotages its chances in two key areas:

1) I'd be shocked to see a zoom with that kind of range open up to f1.4. Even f2.0 would probably be fantasy. Consider the 28-300mm which has f3.5-5.6, or the 28-135mm which also has f3.5-5.6. I think we'd be lucky to get f2.8-3.5 over a 24-135mm range. Throw in IS and there goes your weight criteria.

2) If they sold a great-quality lens in that range, we'd have no need to buy any other bright primes or even the 24-70mm f2.8 ii! The kings of marketing and product-differentiation would never allow it. That reasoning explains the good-but-not-great IQ of the 24-105mm.

But as long as we're dreaming... count me in for one also!  :)

RE Point 1: You might very well be right about the 1.4; so let's just say a lens that's 2.8 at the long end, and whatever it ends up being (faster of course) at the wide end, so it can take full advantage of the X AF points in the 5D3.  As for the weight, OK, maybe a little more, but not much!

RE Point 2: Yes, I suppose it might reduce the sale of some of their other lenses  ;)  But it might also reduce the sales of competitors lenses.  Might be a fair trade.

On the other hand, perhaps Sigma or Tamron might like to step up to bat?

I can dream, can't I?


72
Software & Accessories / Re: Adobe to Stop Making Packaged Software
« on: May 06, 2013, 11:07:06 PM »
People please!  You never owned software, what you always bought was a license with only a time limited assurance of support, bug fixes, etc.  Then you upgrade to the next version at semi-regular intervals and so it goes on for eternity.

No, I bought that software and I expect it to function as purchased FOREVER - on my stand-alone machine that has no connectivity to the outside world.

Support, bug fixes, etc. are options I can chose to forgo, or pay for, my choice.

The real problem is that when Adobe goes bankrupt in 5 years and the license servers go off line, every one of their subscribers is SOL.  It's happened before, it will happen again.

Which is why the cloud subscription model is a loser for anyone who cares about what they are using/doing/counting on.  A business person (eg: professional photographer) who uses Adobe is rolling the dice with their livelihood.  Bad move.  You're not a secured creditor, they owe you nothing when they fail, and your customers are not going to be amused when you tell them that all those photos you were going to have for them aren't going to show up.

Onward and upward?  More like downward to the netherworld.

Oh bollocks!

The software that you currently own WILL work forever on your machine.  No one is forcing you to upgrade to CC.

You want choice... that was part of my original point, people are resistant to change, don't like new models, demand choice, demand control over everything.

Adobe goes bankrupt?  It could, but you images are not lost, your RAW files are not lost.  You have to back them all up just like you do now.  No difference there.  Ok, so you Adobe software stops working after a while but even under the current perpetual license versions you'd eventually (and within a relatively short time) have to move to another product to stay current with features etc.   And besides, when companies fail they don't go poof in the middle of the night... you'd have some warning... you're not going to suddenly have to tell your customers their photos have been lost forever in a black hole.

Boy oh boy, THE SKY IS FALLING!

True, your raw images are still there.  And all the work you did that you saved as jpegs or tiffs are still there.  But your entire workflow, all the modifications you made, and which require their software to retrace and modify, are gone.

And no, you won't have any warning they are going away, unless you are an insider.  They DO go poof in the middle of the night.

Meaning that if you take your photography business seriously, you have to freeze your baseline right here, and can no longer rely on their products beyond where we are at.  So there will be no updates, no new RAW converters.  That is the fast track to the grave for Adobe.  Self fulfilling prophecy.

Although I imagine that most of the younger folks will be seduced by the latest and greatest.  Until they get burned, that is.  But then, I was in the personal computer industry back when the 8080 was the latest and greatest, and Bill Gates was still in knickers.  So I've already been burned, and won't trust any of these companies.

The Cloud - a mainframe (even if it is made up of distributed elements) by any other name is still something outside your control.  Do you really want to go back there?  What's next - punch cards?

73
Software & Accessories / Re: Adobe to Stop Making Packaged Software
« on: May 06, 2013, 10:20:44 PM »
People please!  You never owned software, what you always bought was a license with only a time limited assurance of support, bug fixes, etc.  Then you upgrade to the next version at semi-regular intervals and so it goes on for eternity.

No, I bought that software and I expect it to function as purchased FOREVER - on my stand-alone machine that has no connectivity to the outside world.

Support, bug fixes, etc. are options I can chose to forgo, or pay for, my choice.

The real problem is that when Adobe goes bankrupt in 5 years and the license servers go off line, every one of their subscribers is SOL.  It's happened before, it will happen again.

Which is why the cloud subscription model is a loser for anyone who cares about what they are using/doing/counting on.  A business person (eg: professional photographer) who uses Adobe is rolling the dice with their livelihood.  Bad move.  You're not a secured creditor, they owe you nothing when they fail, and your customers are not going to be amused when you tell them that all those photos you were going to have for them aren't going to show up.

Onward and upward?  More like downward to the netherworld.

74
Lenses / Re: Poll: Most Wanted New Lenses of 2013.
« on: May 06, 2013, 09:26:42 PM »
I want a lens that does not yet exist.

I would like a 24-135 f1.4-f2.8 L with IS.

Preferably less than 800 grams; black, not white; and using a 77mm filter.

That would be my perfect walkabout lens (the the perfect kit lens).  The 24-105L is really nice, but I wish it were faster.  I've finally come to appreciate the advantage of the faster lens with the 5D3 AF system.


75
EOS Bodies / Re: Why no crop mode on 5d mkiii 1dx
« on: May 05, 2013, 11:27:26 AM »
It's utter absurd they didn't offer zebra stripes too or focus peaking.
At least ML can add that.
But I fear it is up to Canon to deliver crop mode.
I just don't get how short-sighted they are. There marketing department is killing them. For no reason.

The "problem" is, it ISN'T killing them.

Until it begins to affect the bottom line ($), they will continue to do such things.

When it finally does begin to obviously have an adverse effect, it will be close to too late to save themselves.

On the specific issue here, for me, a crop mode which yields high speed capability would be greatly appreciated, and would be a major selling point.  Look at the prices for the Casio EX-F1 used (wish I had bought one when I had the chance).  Canon is missing a major potential revenue stream that they haven't tapped, and which none of their super expensive cameras does either - so no cannibalization.

I've been a Canon user for 35 years.  Why did I chose Canon initially back in the late 70's?  They were 25% cheaper than Nikon, just as well made, and had the same accessory set.  Now look at who is 25% cheaper, and offers more features.  The storm clouds could be gathering...

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