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Messages - neuroanatomist

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16
Canon General / Re: Can anyone suggest the adapter for my lens?
« on: July 23, 2014, 05:29:05 AM »
What are you trying to adapt/mount?

17
EOS Bodies / Re: 5d Mark III Misaligned Transmissive LCD
« on: July 22, 2014, 07:58:43 PM »
Liveview using live AF has no physical link to the AF points, it uses the sensor.  Liveview using Quick AF does use the AF sensor, but those points are electronically generated, and there is no physical connection or link to the AF sensor or the transmissive LCD.  Getting all three lined up does involve tolerances.

Presumably, the electronically generated AF point array shown on the main LCD during Live View Quick AF is 'ideal' – the center point is dead center on the image.  But the AF array on the transmissive LCD should be similarly centered, as should the actual AF sensor. 

That's three separate components, each of which must be properly aligned, and as you state they each have a manufacturing tolerance.  It would certainly be possible for two of the three to match and the third to be differently aligned.  Misalignment between the VF transmissive LCD and the 'ideal' display on the main LCD is easiest to detect (as in the OP's case), but if those two are aligned, the actual AF sensor could still be off...and that's more difficult to detect.  I have carefully tested my 1D X (specifically, I tested that the transmissive LCD was aligned with the actual AF points, in Live View I use contrast-detect AF – but the transmissive LCD also aligns with the 'ideal' main LCD). 

18
EOS Bodies / Re: 5d Mark III Misaligned Transmissive LCD
« on: July 22, 2014, 06:01:45 PM »
I agree the AF array in the VF and on the main LCD for Quick View AF should be aligned, and your first image shows they aren't (on my 1D C they are perfectly aligned).  However, your test shots – particularly the graph paper – fail to convincingly demonstrate an issue.  Focusing on steeply-angled graph paper, like focusing on an angled ruler, is providing multiple appropriate focus targets at different depths...you may know which one you're trying to focus on, but the camera's AF system can't read your mind.  The girl's brow is a very low-contrast target.  Also, that may be an AFMA issue.

19
EOS Bodies - For Stills / Re: Using viewfinder and square images
« on: July 22, 2014, 12:46:52 PM »
Check 3rd party focus screen options (although the screen on the 5DIII isn't considered user-replaceable by Canon).  Canon sells (sold?) screens with 4:5 and 5:7 aspect ratio masking.

20
EOS Bodies / Re: Eos7D mk2, How EXCITED will you be if . . .?
« on: July 22, 2014, 10:18:09 AM »
I'm sure mammals require more effort (staying downwind, etc), but I've never attempted to photograph them.

Mammals can be easy.  They let you get nice and close sometimes.  Just make sure any bunnies you try to take pictures aren't from Caerbannog...

It's just a rabbit!

Well, that's no ordinary rabbit!  That rabbit's got a vicious streak a mile wide!  It's a killer!

21
EOS Bodies / Re: Eos7D mk2, How EXCITED will you be if . . .?
« on: July 22, 2014, 08:42:43 AM »
I'm sure mammals require more effort (staying downwind, etc), but I've never attempted to photograph them.

Mammals can be easy.  They let you get nice and close sometimes.  Just make sure any bunnies you try to take pictures aren't from Caerbannog...

22
Lenses / Re: Sigma 50mm Art 1.4 Focusing problems
« on: July 22, 2014, 08:24:22 AM »
I have never owned a Sigma lens with focusing problems.  But then...I've never owned a Sigma lens.  :P

I have tried a couple, and found the focus to be erratic on both. 

I think it's fair to say that some lenses have focus issues, across all brands.  The proportion of those problematic lenses does seem higher with Sigma.

23
I am in a major city, but I get the heeby jeebies that they'll know (a) I own other decent gear and (b) where I live, so it becomes a 'meet me at Panera Bread' highly public transaction.  Not a fan.  They could ask to hook it onto their body for test shots -- a totally fair request -- and then just walk away.

I've sold plenty of gear on CL, meeting in front of my work (where Security is watching) or at Starbucks.  Several of the items have been >$1K, no issues at all. 

24
Lenses / Re: New Canon 16-35 f4 IS not listed in CPS directory
« on: July 21, 2014, 05:18:30 PM »
LOL, and if you do find it, please see how far you can take the "No limit" on my AMEX ;)  B&H would be a good place to start ;D

B&H take cash, too.  Although in my experience it takes a surprising number of B&H employees to count the money and fill out the IRS paperwork when you walk in and pay for a 600/4L IS II with a stack of Benjamins.   8)

25
Software & Accessories / Re: Tripod legs locking mechanism
« on: July 21, 2014, 04:54:17 PM »
I've used both, and I find twist locks faster and easier.   A whole set of twist locks can be easily loosened or tightened with one hand.  A set of flips can be closed with one hand, it's harder to open the whole set.  With most flip locks, you need a tool to disassemble the legs, not needed with twist locks (important if you use the tripod in water/silt/sand).  Twist locks allow you to loosen a leg with some tension, making height adjustments easier.

I suspect there's a reason the top brands – RRS and Gitzo – use twist locks.

I prefer no center column (or optional) and availability of a leveling base for using a gimbal or shooting panos. 

26
Software & Accessories / Re: Apply Loctite to RRS foot replacement?
« on: July 21, 2014, 12:05:24 PM »
I used Loctite Blue 242 on the RRS LCF-53 for my 600 II.

27
EOS Bodies / Re: 7D II specs appear at Snapsort
« on: July 21, 2014, 10:02:50 AM »
Yes, they look quite reasonable and accurate.  For example, the 13.8µm pixel size, which is twice the size of the 1D X pixels and much larger than any APS-C camera.  Or the 0.38x viewfinder magnification, a pretty big step down from the 7D's 1.0x, don't you think?  Oh, and it was announced well over a year ago.

This is Snapsort trying to draw hits to their site.  I'm sure they appreciate your help...

28
Reviews / Re: Please help me love ef 35mm f2 IS vs 40mm pancake
« on: July 20, 2014, 10:00:00 PM »
I'd print out a 'starburst' target, they work better than lines.  Distance is fine (usually 25-50x focal length).

29
Reviews / Re: Please help me love ef 35mm f2 IS vs 40mm pancake
« on: July 20, 2014, 09:29:40 PM »
Did you do an AF microadjustment on the 35/2 IS?

30
Lenses / Re: What Lenses are missing from Canon's range
« on: July 20, 2014, 12:13:37 PM »
Out of interest Neuro, do you have the 8-15mm ?

Nope...I have no real desire for a fisheye lens.

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