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Messages - neuroanatomist

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61
EOS Bodies / Re: Just for Jrista: 2014 Market Data
« on: September 22, 2014, 11:50:56 PM »
But I'm sure if back then a new film came out with higher DR and *no* other disadvantages, that he'd have said 'nah, I'll just use the old film and work around the limitations.'

Please do let me know when I can pop a roll of Exmor 'film' into my Canon camera, so I can have great AF with my handholdable 600mm f/4 lens, use my radio controlled flash system, etc. 

62
EOS Bodies / Re: Just for Jrista: 2014 Market Data
« on: September 22, 2014, 11:06:24 PM »
My *point* is that I wouldn't have had to with a good sensor.

Huh? Who set that standard?

63
EOS Bodies / Re: Sample Images From the EOS 7D Mark II
« on: September 22, 2014, 06:38:32 PM »
Neuro
I own an 800 lens & 5D iii. I  shoot paranoid birds in the west with a 1.4 iii tele 80% of the time. I also blow up large prints all the time. Are you saying that for my shooting I might get a better print at 1280 mm with a 7D ii in good light vs 1120 with a 1.4 converter! That would be insane if its true. Think of the auto focus capture rate shooting a 800 naked. Think of all those af points. Don't get me too excited here. I might faint.

If you need to crop your images to smaller than the APS-C FoV, in good light you'd have an advantage with the 7DII behind your 800+1.4x combo.

64
EOS Bodies / Re: Am I the only one excited about the new 7D mk2?
« on: September 22, 2014, 05:21:36 PM »
Canon may have jumped the shark.

LOLz at YAPODFC.    ::)

65
I agree. I was so ready to buy it and then i come to know that even though the 1DX AF system came in, the exposure system did not!

So focus point based spot exposure :(

Yeah, and that's pure marketeering on Canon's part.  Although there may have been technical reasons for the 5DIII not having AF point-linked spot metering, there's no reason the 7DII can't have it...other than Canon reserving that feature for the 1-series bodies.

66
EOS Bodies / Re: Am I the only one excited about the new 7D mk2?
« on: September 22, 2014, 03:26:00 PM »
They are all cross type, however Canon throttles AF speed at f/5.6 relative to f/4 or f/2.8. Even on the 61pt system, even when using only the center points, AF speed slows when I slap on a 1.4x TC onto my 600/4, vs. just using the 600/4. Additionally, at f/5.6, the chances of "hunting" increase. Canon's AF system caters towards looking for a closer subject first when the scene is out of focus by more than a certain (unspecified) amount. So, if I need to photograph a bird in flight, it's FAR better to use an f/4 lens, which is likely to lock on directly immediately, than f/5.6, which is going to hunt forward first if I'm not already close to focus on the bird.

Maybe the 65pt system changes that, but it looks like the same general firmware as the 5D III and 1D X, so I suspect it'll behave the same.

No, Canon does not throttle AF speed at f/5.6 relative to f/4 or f/2.8.  Yes, when you put the 1.4x TC behind your 600/4, AF slows down.  But that's not because the combo is f/5.6, it's because of the TC.  By design (firmware), a 1.4x TC drops AF speed by 50%, and a 2x TC drops it by 75%.  If you put the 1.4x behind the 200mm f/2, you'll have a 280mm f/2.8 lens that activates all 61 AF points including the 5 dual-cross points on the 5DIII/1D X...and still focuses 50% slower. 

The 'hunting' you describe also appears to not be specific to the max aperture or the AF points, but rather to lens or TC combo.  For example, the 100-400L @ 400/5.6 hunts with a busy background, whereas the 400/5.6L locks on much more effectively in that scenario.

Hmm, curious. When I rent the 300 f/2.8 II, and use the 1.4x TC, it still seems to focus extremely fast. Faster than the 600/4 with the same TC.

Maybe it's just the design of the 100-400, but that lens doesn't focus fast, period, as far as I can tell. I haven't used the 400/5.6 with the 61pt system, so I can't speak to it.

The 300/2.8 II is arguably Canon's fastest-focusing lens.  The focusing group in the 600/4 II is ~25% more massive than that in the 300/2.8 II.  The bare 300 II focuses faster than the bare 600 II, so the former will be faster with the same TC.  I suspect the 300/2.8 II is just so fast to begin with that you don't notice the AF speed reduction as much.

Here's the relevant bit from Canon:

Quote from: Canon DLC
As with previous EF Extenders, usage of Series III EF Extenders lowers AF drive speed to improve AF performance. When Extender EF 1.4X III is used, AF drive speed is reduced by 50%. When Extender EF 2X III is used, AF drive speed is reduced by 75%. This may seem like a drawback, but in reality subject tracking performance remains quite high when Series III Extenders are used with IS II lenses. This is due to improvements in AF precision made possible by the new microcomputer in the extenders.

The 100-400L focuses noticeably slower than the 400/5.6, as well, even though both are 400mm f/5.6.

67
EOS Bodies / Re: Am I the only one excited about the new 7D mk2?
« on: September 22, 2014, 02:22:19 PM »
They are all cross type, however Canon throttles AF speed at f/5.6 relative to f/4 or f/2.8. Even on the 61pt system, even when using only the center points, AF speed slows when I slap on a 1.4x TC onto my 600/4, vs. just using the 600/4. Additionally, at f/5.6, the chances of "hunting" increase. Canon's AF system caters towards looking for a closer subject first when the scene is out of focus by more than a certain (unspecified) amount. So, if I need to photograph a bird in flight, it's FAR better to use an f/4 lens, which is likely to lock on directly immediately, than f/5.6, which is going to hunt forward first if I'm not already close to focus on the bird.

Maybe the 65pt system changes that, but it looks like the same general firmware as the 5D III and 1D X, so I suspect it'll behave the same.

No, Canon does not throttle AF speed at f/5.6 relative to f/4 or f/2.8.  Yes, when you put the 1.4x TC behind your 600/4, AF slows down.  But that's not because the combo is f/5.6, it's because of the TC.  By design (firmware), a 1.4x TC drops AF speed by 50%, and a 2x TC drops it by 75%.  If you put the 1.4x behind the 200mm f/2, you'll have a 280mm f/2.8 lens that activates all 61 AF points including the 5 dual-cross points on the 5DIII/1D X...and still focuses 50% slower. 

The 'hunting' you describe also appears to not be specific to the max aperture or the AF points, but rather to lens or TC combo.  For example, the 100-400L @ 400/5.6 hunts with a busy background, whereas the 400/5.6L locks on much more effectively in that scenario. 

68
EOS Bodies - For Stills / Re: Sensor cleaning
« on: September 22, 2014, 07:56:39 AM »
Self clean right at startup is normal.  A half press of the shutter cancels it in progress if needed.

69
EOS Bodies / Re: Official: Canon EOS 7D Mark II
« on: September 22, 2014, 07:31:40 AM »
Some people just can't understand or accept that their own needs and values aren't statements of fact with which everyone must agree. 
Interesting statement. So, turning the argument against yourself, are your needs and values statements of fact, or are they merely your opinion? Do you have a problem accepting that your needs and values, and how you express them, are not shared by Everyone else? Do you represent a majority or a minority?

My opinions are just that - opinions.  Everyone is entitled to their own, obviously.  I tend to value mine above those of others (after all, they're mine for a reason!), although I certainly listen to the latter.  Everyone is also open to having their opinions criticized.   I have no expectation that anyone else must share or accept my opinions...they're opinions.  I do expect people to at least acknowledge facts...I provide supporting evidence in many cases.

I use Canon...so in that sense I'm part of the majority of dSLR buyers.  In many other ways, I'm in the minority...and that's fine by me.

70
EOS Bodies - For Stills / Re: Canon 7D MK2 RAW Files
« on: September 22, 2014, 06:31:21 AM »
Pretty much every new camera requires an update to RAW conversion software.

71
Third Party Manufacturers / Re: Sigma Opens Up About Their Roadmap
« on: September 22, 2014, 06:29:50 AM »
A 24-70 f/2 would be very nice!

72
Third Party Manufacturers / Re: Sigma Opens Up About Their Roadmap
« on: September 22, 2014, 06:14:35 AM »
Sigma’s next DSLR will...
Sigma is not interested in developing a new mirrorless interchangeable camera for now.

The dSLR is dead. Long live the mirrorslapper!!   ::)

73
EOS Bodies / Re: Just for Jrista: 2014 Market Data
« on: September 22, 2014, 06:11:37 AM »
Well, except that you now accept all the claims that Risedal guy made - rather hurtfully to you pity souls - b/c ultimately he was right. But you just don't want to talk about it.

Did I get that about right? Feel free to correct me if I'm wrong.

No, you got wrong. 


Oh, and here's yet another wedding image I was processing from my 5D3 that I decided to throw out b/c by the time I corrected the 3EV vignetting of my 24/1.4 and then added 1.5 stops (b/c I underexposed by 1.5 EV to save the sky/clouds above my subjects), I had this wonder junk overlaid over my image:

I don't know about you, but I just don't deliver that to clients. My D810 wouldn't have even had the smudge related with this noise, b/c it wouldn't have had any(thing but shot) noise to begin with with even a +5 EV push (that's verified; I'm not making it up).

Yeah, sad that all those so-called professional photographers using Canon deliver their clients such crap.  It's just astounding that they manage to barely stay in business, I'm sure no one using Canon is successful as a photographer.

You've proven that Canon sensors can't make a good image, much more effectively than Mikael.  Great job teaching us poor yokels who are still using such incapable cameras.

74
EOS Bodies / Re: Official: Canon EOS 7D Mark II
« on: September 22, 2014, 05:57:47 AM »
lamenting Canon's supposed lack of DR and extolling the virtues of Exmor

See there you go again. Here you try to bring up doubt that Canon is behind in DR or that even if they are that it could ever mean anything. And yet when you finally get called out and backed into a corner as in your post later on, you are like "who me? fanboy? nobody here ever tries to admit that Exmor doesn't have more DR"

So which is it??? You try to have it both ways for everything.

There is a difference between 'Exmor has more DR than Canon' and 'Canon doesn't deliver enough DR'.  There's a difference between 'Exmor allows better low ISO shadow pushing than Canon' and 'Canon sensors deliver poor IQ'. In each case, the former is a statement of fact that is generally accepted here, the latter is a judgement based on an individual's personal needs and values.  Some people just can't understand or accept that their own needs and values aren't statements of fact with which everyone must agree. 

That's not 'having it both ways', that's the ability to distinguish between fact and opinion. 

75
EOS Bodies - For Stills / Re: Which Canon L Lens for 7D Mark II?
« on: September 21, 2014, 10:05:44 PM »
  • Night Sky Photography
  • Head Shots
  • Weddings
  • Maternity
  • Couples
These two list above points to the full frame 6D for sure.

In fact, all of them point to the 6D being the better choice. 


I guess my problem is that in light of the 7DmII and the 5DmIII I feel like I am getting robbed on features and the AF system just seems substandard at this level.  Of course the price point for the 6D is right. 

That does seem to be Canon's strategy.  The 6D delivers excellent IQ particularly in low light, the 7DII delivers top AF and speed.  If you need both, that's the 5DIII...and it actually costs a bit less than the other two combined.


I do have 4 and 6 year olds that will be getting into sports and ballet which a 5DmIII would do well but I think the 6D would be questionable.

Low light action is best served by excellent AF and a FF sensor...and fast lenses.  None of that is cheap.  In gymnasium lighting, I often need ISO 6400 or 12800 to get a 1/640 or 1/800 s shutter speed to freeze motion...and that's with an f/2.8 lens wide open. 

With the exception of your kids activities, the 6D is the ideal choice.  Although the 6D's AF isn't up to the level of the 5DIII or 7DII, good technique can help there.

I really think a FF body is a better option for your needs; but...you initially asked about lenses, and they're important too.   

Important lens characteristics include:

  • Night Sky Photography - wide angle, fast aperture (but for the moon you want the longest lens you can get, and it can be slow)
  • Head Shots - short/medium telephoto, fast aperture
  • Weddings - standard zoom, f/2.8 preferred; telephoto zoom, f/2.8 preferred
  • Maternity - standard zoom, f/2.8 preferred; short/medium telephoto
  • Couples - standard zoom; telephoto zoom (neither need be fast, you'll be stopped down to at least f/4 for sufficient DoF

To have the optimal lenses for a diverse array of subjects means several lenses (which is why I have 5 zooms and 9 primes!).  The aperture suggestions above are based on ambient lighting; if you're going to set up a home/portable studio (backdrop + stand, flashes or monolights + modifiers), you'll be stopped down a fair bit and slow lenses are fine.  Don't forget that some of the non-L primes deliver excellent IQ, and with session work (headshots, maternity, couples) you'll have time to move so the flexibility of a zoom isn't critical.  The 85/1.8 is one of the best values in terms of IQ/$.  The Samyang 14/2.8 would likely work well for night skies.

Given your budget and needs, do consider refurbs (assuming you're patient but quick, desirable refurbs come up periodically and sell out fast).  A refurb 5DIII is $2700, a refurb 24-70/2.8 II is $1700.  You could start with f/4 zooms, and move to f/2.8 versions later.


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