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Messages - neuroanatomist

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6136
Lenses / Re: Used 300 2.8 L IS Mk I
« on: July 01, 2013, 01:22:04 PM »
But still a heavily used lens will show signs of use on other places...

True.  I was just pulling your leg...erm...foot.   ;)

6137
Lighting / Re: YN-622C and 600ex-rt setup question
« on: July 01, 2013, 12:49:10 PM »
No - you'll need a transceiver for each flash (and one on the camera).  Alternatiely, you could get a cheap optical slave trigger for the second 600 (the Sonia one with the green base, $16 from flashzebra or on eBay).

6138
Lenses / Re: Used 300 2.8 L IS Mk I
« on: July 01, 2013, 12:42:45 PM »
The older lens looks essentially new -- not even a mark on the tripod foot.
Then it is probably less used and/or more well taken care of. So it must be a better choice.
[/quote]

My 600 II doesn't have a mark on the tripod foot, either.  Of course, that's because 5 minutes after first unpacking the lens, I swapped out the Canon foot for the RRS replacement, and packed the Canon foot away in the case.  ;)

6139
I've ordered three of them...all from Amazon (not a 3rd party/marketplace vendor), one when it came out in March of last year, and two more this past April.  All of them are fine.

No idea what this means, but B&H, Adorama and everyone else seem to still be selling it, so it is likely an issue or glitch on Amazon's end.

6140
EOS Bodies / Re: EOS 70D a New Benchmark in ISO Performance?
« on: July 01, 2013, 12:34:22 PM »
I want the RAW files to be as "RAW" as possible.

There are certain things (quite a few, actually) that really should be done to raw data before they are saved, including hot/dead pixel mapping, correlated double sampling, and ADC calibration.

Is the application chroma NR one of those things?  How about a median blur filter for long exposure shots?  ::)

6141
Lenses / Re: Teleconverters/Extenders, Canon or Kenko?
« on: July 01, 2013, 12:33:43 PM »
Do you know if it is still possible to focus on distant subjects if you use a 300 f2.8 +2xIII , 12mm extension tube and 1.4 converter?

No idea.  I've tried with my 600/4, and even though only one of the extenders is reported, AF doesn't work (it isn't disabled as it would be with an f/11 reported max aperture, but it just racks the focus back and forth and fails to lock onto anything).  Contrast detect AF does work, though. 

But that's with an f/4 lens.  I could try the two extenders with the EF 12 between them on my 70-200/2.8L IS II, if you like. 

6142
Software & Accessories / Re: Current Monitor Color Checkers
« on: July 01, 2013, 12:04:50 PM »
I know a lot of you are using x-rite i1 and we've had this conversation on other threads, but as of half way through 2013, which software/hardware versions are you all using and on which OS?

I've used my X-Rite i1 Display2 on a 17" MacBook Pro, a 13" MacBook Air, and a Thunderbolt Display (27") with the MBAir connected.  I've run it under 10.6 (the i1 Match software) and under 10.7 and 10.8 (the i1 Profiler software).

6143
Lenses / Re: Teleconverters/Extenders, Canon or Kenko?
« on: July 01, 2013, 11:57:21 AM »
Another point is Canon III extenders don't stack because of the protrusion (perhaps it's for weather resistence, but probably more for preventing us from using them in ways they weren't designed -- Murphy-proofing).

It's the extra elements in the 2xIII.  You can still stack a 1.4xIII behind a 2xII.  With the MkIII extenders, you can put a 12mm extension tube between them to stack...if you're willing to take the IQ hit from stadking, that is...

6144
Lenses / Re: What's the Difference: 1.4X EF Extender 2 Vs. 3
« on: July 01, 2013, 11:17:38 AM »
One big difference is the AF circuitry, which was optimized to work with the newer MkII supertele lenses to provide faster and more precise AF when using the extender (AF performance with other lenses is the same as the MkII extenders). 

According to Bryan at TDP, the 1.4xIII has less barrel distortion and noticeably less CA.  The 2xIII is slightly sharper in the mid frame and corners, and has slight barrel distortion (whereas the MkII had slight pincushion distortion - which is generally less noticeable than barrel).

Physically, the 2xIII has two more elements and is 22% heavier; the 1.4xIII also has two more elements (grouped differently, so one less group), but the weight is pretty much the same.  The MkIII versions have the fluorine coating on the exposed elements which makes them easier to clean.  Also, the MkIII extenders have the 'new' paint color which matches the MkII superteles, if that sort of thing matters to you...

6145
Lenses / Re: Used 300 2.8 L IS Mk I
« on: July 01, 2013, 11:10:14 AM »
Canon doesn't really do 'stealth' updates - doing so would mean changing the manufacturing line, requiring revalidation of the process, etc.  If there are issues, yes they change the line - but there are no advisories on the 300/2.8L IS.  So, the electronics will almost certainly be the same between the two lenses. 

I'd be inclined to the pristine US over the 'very good' UV, personally.  I have had a UT 300/4L IS and an UL 200/2.8L II, and both were excellent.

6146
Lenses / Re: Teleconverters/Extenders, Canon or Kenko?
« on: July 01, 2013, 11:07:01 AM »
I have both the Canon 1.4xIII and 2xIII.  I have read that the Kenko 1.4x is 'as good' as the Canon 1.4xIII in some reviews, others indicate that it's as good as the 1.4xII and a little short of the 1.4xIII.  I have not read many reviews of the Kenko 2x, but the few I've seen suggest it's not nearly as good as the Kenko 1.4x or any Canon 2x.

The other issue with Kenko TCs is compatiblity.  They come in different firmware versions, indicated by colored dots on the TC.  They cannot be updated.  Many users have reported issues with certain combinations of Kenko TCs and Canon bodies + lenses.  One apparently reproducible issue occurs with the latest Kenko 1.4x and the 5DIII - if you have AFMA enabled, the camera locks up and you need to pull the battery to reset it.  The 'solution' is to not use AFMA with the Kenko TC...and IMO, that's no solution at all unless you're lucky enough that your combo doesn't need it (and no guarantee that will be true with the next lens you try).

The only reason to go with a Kenko TC, IMO, is if you require it for a lens like the 70-300L or 100L Macro, where the Canon TC's won't work for physical reasons.  But personally, I'd recommend going with the Canon TCs and sticking with compatible lenses.

6147
Third Party Manufacturers / Re: Gitzo tripod or no?
« on: July 01, 2013, 11:01:30 AM »
Personally, I prefer Really Right Stuff as 'the best' support gear.  I find the build quality to be a little better than Gitzo (e.g. the aluminum parts are anodized on RRS, painted on Gitzo), the teardrop feet are more stable, etc.

Of course, RRS is even more expensive than Gizto, and unless you're local to SLO, CA you can't even try them out without buying them (they only sell direct, no distributors).

Regarding the legs sliding completely out, they're designed to do that if you unscrew the locks far enough (that might or might not be what was happening with the one you tried).  What happens if you get saltwater or windblown sand in your tripod legs?  With Gitzo and RRS, you just unscrew the locks, disassemble the legs, rinse them with clean water and let them dry - they're designed to be field-strippable/cleanable.  Manfrotto legs require tools to take apart (usually a hexkey and a nut driver; for some you have to pound out a pin with a hammer and awl). 

6148
EOS Bodies / Re: EOS 70D a New Benchmark in ISO Performance?
« on: July 01, 2013, 10:28:20 AM »
Well, that ought to DRum up some DRead from the DRoll DRones who DRool over DR, and DRag many a forum thread down the DReary path of DRivel, DRaining into puddles of DRoss.

 :D

6149
Lenses / Re: Canon EF 500mm f/4L IS II travel bag for Alaska
« on: July 01, 2013, 10:21:19 AM »
This is a very interesting choice but it's better for situations where you have to carry your camera/500mm lens with almost nothing else.

I use the Lowepro Lens Trekker 600 AW II for that situation, which is basically most of the time I'm using the 600 II.  However, with Lowepro's Sliplock system, I will often attach a lens case or two to the outside of the Lens Trekker, for a standard zoom, etc.  I also sometimes just drop the 40/2.8 into the outer pocket.  With the L-bracket on my camera, I can use the side-mount gimbal with a regular lens when I want a wider AoV.

6150
Lenses / Re: Kit for California trip
« on: July 01, 2013, 10:05:59 AM »
Good options. I wasn't sure if the 24-70 II would handle low-light well enough that I wouldn't need the 50 or not.

I find that the 24-70 handles low light well enough for me, with the caveat that the 1D X does ok in the ISO 6400 - 12800 range.  The thing is, with many fast primes and my typical subjects, the DoF at f/2 or f/1.2 is too shallow for 'general' use in low light anyway (the exception being the 35L with reasonably distant subjects).  So for routine use, I grab the 24-70, and the fast primes are used only when I want that extremely thin DoF (portraits, usually).

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