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Messages - neuroanatomist

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6301
EOS Bodies / Re: Canon EOS 70D Announced
« on: July 02, 2013, 11:35:03 AM »
Is AFMA even necessary with the new focusing system? I'm just wondering. I got the impression that since the sensor itself is confirming the focus, adjustments might be less important.

No, AFMA isn't necessary for the Dual Pixel CMOS AF, nor is it necessary for the Hybrid CMOS AF or good ol' Live View contrast detect AF.  But remember that those AF modes which use the CMOS image sensor only operate with the mirror up - not through an optical viewfinder.  The 70D has the 19-pt AF sensor (from the 7D) that's used when looking through the VF, and that requires AFMA just the same as any other standard phase detect AF system.

That standard phase detect AF is still the go-to with fast moving subjects, and holding a heavy camera + lens out in front of you for Live View composition isn't always easy - the VF is there for a reason.

6302
Third Party Manufacturers / Re: Gitzo tripod or no?
« on: July 02, 2013, 11:31:38 AM »
One thing that has not been mentioned (unless I missed it in skim reading) is what kind of connector you want to open and close the leg extensions.  Most (perhaps all) Gitzo's have the screw locks which I personally hate.  It is just too uncomfortable and time consuming to unscrew and screw the round collar.  I much prefer a simple flip lever, one of the reasons I use Manfrotto. 

And for those of us who care about such things, Manfrotto is made in Italy and most other brands are made in China.

Choice of locks is a personal thing, I suppose. 

I had the Manfrotto 190CXPRO4 tripod and 694CX monopod with lever locks, now I have two RRS tripods and an RRS monopod with twist locks.  I liked the flip locks, but having used the twist locks for a while now, I find them much faster.  I can grab the whole stack of collars and unlock or lock them all at once when the legs are collapsed, and they require less force than the Manfrotto levers.  It takes only 1/4-turn to unlock/lock the twist locks.  Fully extending my RRS TQC-14 (same number of sections as the 190CXPRO4) takes me about half the time that it took with the Manfrotto lever locks.  Worth noting that if you have used a cheap tripod with twist locks, those often don't have anti-rotation on the legs, so you have to hold each leg section as you twist the collar - I had an old Slik mini-tripod that was like that, and it was a PITA. 

For those who care about such things, RRS are the only CF tripods made entirely in the USA.

6303
EOS Bodies / Re: Canon wants to make everyone a filmmaker
« on: July 02, 2013, 11:20:49 AM »
Well, I have a pretty nice dSLR.   ::)  But I don't use it for handheld video and instead, I have a Canon Vixia HF M41 camcorder for that.  I frequently bring both with me.  Obviously, the main reason is the lack of a usable 'camcorder-like' AF in the dSLR. 

Canon's Dual Pixel CMOS AF appears to change that.  I'm not sure if it will get incorporated into the high end dSLRs at some point (it might not - the Hybrid CMOS AF hasn't), but if it does, and the AF performance is as-billed, I'd consider ditching the camcorder and just using the dSLR for video.

6304
Software & Accessories / Re: About to start with Focal
« on: July 02, 2013, 11:16:25 AM »
I have noticed that my 5D3 will on many occasions forget to record the AFMA value in the EXIF, so I need to enter it manually in Focal. I still haven't figured out exactly what that triggers it.

Do you use back button AF?  If so, and you're not holding the AF-ON button as you press the shutter, the AFMA is not recorded in the EXIF (nor is the selected AF point).

I do use the back button AF, so my problem is probably right there. Pretty stupid firmware decision, if you ask me (OK, I know you didn't).

I sort of think it makes sense.  If you're not pressing AF-ON, the camera isn't actively focusing when the shot is taken - therefore, the details of the focus lock aren't recorded.  If you use the shutter half-press to AF, you're always focusing when you fully press the shutter.  With shutter button-linked AF, if you focus-recompose, the selected AF point is recorded, but it's not over the subject.  With back button AF, the selected AF point isn't shown at all - to me, that's better than having it not on the subject.  (Even better would be if it used the gyros for the dual-axis level to compensate for the movement by adjusting for the backfocus that it causes and is evident with a fast prime - but I'm not holding my breath for that one, even though Hasselblad does it.)

6305
EOS Bodies / Re: Canon EOS 70D Announced
« on: July 02, 2013, 10:50:51 AM »
Hmm, I see that now.  Crazy how they would not put that in the list of features on the USA site.  ::)

Highlight a feature intended to correct for inconsistencies in the manufacturing process?  A feature that even the manuals for the cameras recommend you not use?   ::) ::) ::)

6306
EOS Bodies / Re: Canon Dual Pixel Liveview Autofocus
« on: July 02, 2013, 10:47:18 AM »
I'm also hoping that the pixels aren't all split in a left/right horizontal pattern, as the video shows, but that half of them are split vertically, because no one would want the AF system to be sensitive to horizontal contrast only.

Based on what I've read, including a statement from Chuck Westfall who was asked for clarification on the matter, they are all split in the same direction.  That means the Dual Pixel CMOS phase AF system is a giant vertical line sensor, responsive only to horizontally-oriented details.

6307
Software & Accessories / Re: About to start with Focal
« on: July 02, 2013, 10:44:25 AM »
I have noticed that my 5D3 will on many occasions forget to record the AFMA value in the EXIF, so I need to enter it manually in Focal. I still haven't figured out exactly what that triggers it.

Do you use back button AF?  If so, and you're not holding the AF-ON button as you press the shutter, the AFMA is not recorded in the EXIF (nor is the selected AF point).

6308
EOS Bodies / Re: Canon EOS 70D Announced
« on: July 02, 2013, 10:07:51 AM »
Isn't a digic 5+ faster than two digic 4s and then some? That and the same battery as 7D should drive the AF just as fast and accurate right?

Digic5+ is 17 times faster than Digic4. 

But the Canon site doesn't show this as a feature.  Why would they not list an important feature on their USA site if it has it?  Hmmmmm.

Indeed it does, just check the UK site: http://www.canon.co.uk/For_Home/Product_Finder/Cameras/Digital_SLR/EOS_70D/index.aspx, Specifications

Thanks! That also answers the question about one vs. two values for zooms (two).

@ Studio1930 - Canon USA doesn't seem to list AFMA as a feature for any of the bodies which have it...

6309
Pricewatch Deals / Re: Preorder the Canon EOS 70D
« on: July 02, 2013, 09:58:00 AM »
Not to be negative...

Actually, you're doing quite a good job at something you claim to not be doing...   ;)

6310
Third Party Manufacturers / Re: Gitzo tripod or no?
« on: July 02, 2013, 09:56:28 AM »
The bottom end of the range Gitzo's don't compare to the top end. The traveller pods are pretty weak and unstable compared to the Systematic range. You probably think....I'll just get this traveller for now...but you will find that you will want more stability soon enough.

The RRS travel tripod that compares to the Gitzo Traveller is the TQC-14.  I have it, it's an incredibly robust tripod in a small, light package (I wanted something that would fit in my Storm im2500 carryon hard case without removing the head). 

A friend has the 1542T, and we compared them side-by-side.  The RRS TQC-14 is substantially more stable - it is rated for 25 lbs, but it can support a lot more. How much more? Let's just say I would not recommend trying this with the 1542T...   ;)


6311
EOS Bodies / Re: Canon EOS 70D Links
« on: July 02, 2013, 09:45:33 AM »
I'm curious whether MFA (single or 2-field) has been re-added.

Yes, it has AFMA.  Not sure yet whether it's one or two values per lens. 

EDIT: confirmed - separate W and T settings for zooms.

6312
EOS Bodies / Re: Canon EOS 70D Announced
« on: July 02, 2013, 09:44:40 AM »
Strobists will be happy if the spec list at B&H is correct.

Max sync = 250th of a second.

And another first....

It has a focus assist (AF) beam.

2, until now, Nikon only perks.

Sorry, but while the B&H spec list is correct, your interpretation of it leaves something to be desired.  As was pointed out, the 1/250 X-sync has been available on a number of Canon APS-C bodies.  Also, the AF assist beam is a rapid strobe of the popup flash, not the separate, dedicated AF assist lamp you seem to think it is.  That's one good reason to buy a 430EX II or better flash...

DP Review has a hands-on preview as well. One thing they mention is AF to F/11 in live view. Does this mean there isn't the <F/8 issue with, for example, long telephoto + TC's?

Yes, on the 70D you can AF in Live View with an f/8 or f/11 combo (an example of the latter is the 100-400L + 2x TC or 800/5.6 + 2x TC).  Of course, you've always been able to AF in Live View with an f/11 combo.  My 7D could do it.  The difference is that this is phase detect AF at f/11, meaning it's faster than the contrast detect which doesn't care about aperture.

360 degree mode dial. That'll please some people  ;)
Not me though. I like the stop in the dial in the 7D, as it makes it easier to use it blind (with eye in the viewfinder), mainly switching between the three custom modes. In particular moving to C3 is very easy, just move it as far as it goes.

+1 - on the 7D, I liked being able to just spin the mode dial to until it stopped and be at my C3, my birds in flight aka "OMG quick get a picture of that flying pig" setting.  For the same reason, I am not a fan of the idea of a locking mode dial.  But then again, I no longer have a mode dial, at all...

No mention of a dedicated AF processor, just like 7D/5DIII have. It's what it makes their AF exceptional. 70D "only" has a Digic5+.

I have this feeling the AF will not on pair with the 7D's.

I suspect it will perform equivalent to the 7D, even if it doesn't have a dedicated AF processor (and it still might have one - a detail like that might not be worth highlighting, and may actually detract from/confuse the dual pixel CMOS promotion, but more information will come along soon).

6313
Lenses / Re: 500mm or 600mm lens on a monopod.
« on: July 02, 2013, 08:36:15 AM »
The RRS monopod heads come in a couple of flavors.  If you plan to only use it with your 600, the MH-01 is likely the better choice.  The MH-02 allows you to rotate the clamp 90°, to use the head with a camera body plate instead of a collared lens, with a simple knob adjustment (with the MH-01, you can rotate most clamps but you need a hex key to do it).

Although I use their lever clamps in many applications, for the monopod head I went with the screw clamp.  I frequently carry the rig on my shoulder, and that puts the monopod head clamp right where a backpack strap rests. I don't want to risk inadvertently opening the lever clamp, no chance of that with a screw knob.

6314
EOS Bodies / Re: Canon Dual Pixel Liveview Autofocus
« on: July 02, 2013, 12:27:57 AM »
Interesting and promising.  Still not as fast as true phase AF, I expect.

Still...I was considering the EOS M, but maybe I'll wait for the EOS M MkII with this technology...   ;)

6315
Pricewatch Deals / Re: Preorder the Canon EOS 70D
« on: July 02, 2013, 12:14:43 AM »
According to DPR, the 70D has AFMA.

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