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Messages - neuroanatomist

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7651
Software & Accessories / Re: Good GND filter to go with new Lee system
« on: March 09, 2013, 10:14:38 AM »
Thanks for the update! 

I've had the Lowepro S&F filter holder for a while (picked it up dirt cheap at a brick-and-mortar shop closeout).  My current thinking is to start with the 3-stop soft and 3-stop reverse to start.  But first up will be a 24-70 II.  :)

7652
Speedlites, Printers, Accessories / Re: First flash unit advice?
« on: March 09, 2013, 04:10:50 AM »
thanks for the advise, but it will be mostly for outdoor fill. will the 100m canon macro lens on the 5dmk2 get too much in the way for macro? or is the flash high enough?

Depends on how close the subject is, at 1:1 maybe. The 580/600 heads can also tilt downward a few degrees.  But regardless, you'll probably want to get the flash closer to the subject for softer light.  I'd recommend an off-camera shoe cord, and handhold the flash (if the camera is on a tripod) or use a flash bracket like the Manfrotto 233B (I've shot macro with the 430+OC-E3+Manfrotto 233B).

7653
Lenses / Re: Replacing the Tripod Mount on 500 f4L II
« on: March 08, 2013, 10:44:47 PM »
If you want, you can put a little Loctite Blue 242 on the screws. You can still remove them, but you won't have to worry about them coming loose.

7654
Lenses / Re: Replacing the Tripod Mount on 500 f4L II
« on: March 08, 2013, 10:37:58 PM »
The heavens will open up and lightening will strike you down.

Of course, that didn't happen when I replaced the foot on my 600 II with the RRS LCF-53...

Just tighten them well, you'll be fine.


7655
Speedlites, Printers, Accessories / Re: First flash unit advice?
« on: March 08, 2013, 06:49:27 PM »
The 430 has sufficient power for fill and indoor use, as long as you're not sticking it in a modifier.

7656
Lighting / Re: 600EX RT vs AlienBees
« on: March 08, 2013, 05:48:28 PM »
On the top of those Einsteins....looks like an antenna.

Are these things wireless (radio) ready?

You're seeing the knob used to tighten an umbrella in place.  But, there's a connection socket on top which accepts a Buff CyberSync receiver or a PocketWizard PowerMC2 (I have the latter).

7657
Lenses / Re: Need a lil help with a lens purchase decision
« on: March 08, 2013, 03:52:34 PM »
I was figuring the crop factor of 1.6x X 200 = 320 X 1.4x = 448

Right, but 400 x 1.6 = 560mm FF equivalent.  With birds, you usually need all the focal length you can get.  I have the 600/4, and I frequently use it with 2x for a 1200mm lens, and even then I sometimes need to crop.

7658
Lenses / Re: Need a lil help with a lens purchase decision
« on: March 08, 2013, 12:17:37 PM »
First off, you state, "I will at some point in the very near future trade up to the 7D for its faster frame rate and AF system,"  be aware that it's a trade up in terms of frame rate and AF vs. the 5DII, but a significant step down in terms of IQ and high ISO noise performance.  For the things you commonly shoot (landscape, tabletop, some portraits, night photography, some architectural and a tad street), the 5DII is a much better choice.  So, for birds I'd really consider adding the 7D to your kit, rather than trading.  The 5DII and 7D are an excellent combination (although IMO the 5DIII is really the best of both, in one body).   I have similar interests as you, shoot many different subjects, birds amont them.  For a couple of years, I shot with the 7D + 5DII combo, it works very well. 

Honestly, the 7D + 100-400L is one of the best birding combos you can get in terms of price for performance.  The AF and frame rate are great, you get a 400mm lens with very good IQ, and IS which is helpful for stationary birds, so you can shoot at ~1/200 s or so.  If you look in my birds photostream (Flickr link, while the latest shots are with a much more expensive setup (1D X + 600/4L IS II), most of them are with the 7D and 100-400mm.  The 70-200mm f/2.8L IS II + 2x TC is similar in IQ, with better IS, but the cost of that setup apporaches the 7D+100-400, and the the 7D will be better for birds than the 5DII.

Bottom line, I'd recommend adding a 100mm Macro (the L verison if you can afford it) to round out your FF kit for the subjects you listed, then picking up a 7D + 100-400L for birds.

7659
Lenses / Re: 200-400 f/4 L IS vs 100-400 vII (hypothetical)
« on: March 08, 2013, 12:06:43 PM »
and never try to hand-hold a lens that won't fit in your boot :)

and Neuro is right.... an apartment is a flat

Wait, wait...boot...is that the things on my feet today, to make it easier to walk through the 11" (or is that 28 cm?) of snow that's fallen so far here in Boston...or is that the large compartment in my car where I carry groceries, etc.?  Because a 70-200/2.8 won't easily fit in the former, but an 800/5.6 will easily fit in the latter.

 :P :P :P

7660
EOS Bodies / Re: Canon EOS 7D Mark II Information [CR1]
« on: March 07, 2013, 05:15:08 PM »
If the lens motor was receiving the same power from a 1D X and a 7D, then the AF speed for the lens would be the same with both bodies.  But it's not, it's faster with the 1D X.

Could it be firmware trickery on the part of Canon, the 7D delivers the same power as the 1D X, but the 7D just tells the lens to AF slower?  Possible, I suppose...but that seems a little too cynical, even for me.   :P

This is something that has puzzled me about saying the lens is doing the AF. The lens does not have the AF points and it does not see the image, so how can "the lens" be doing AF.
As far as I can understand this, the camera is doing the AF and is telling the lens motor to rotate the lens to bring the image into focus. If I am wrong, please point me at something that explains it. I have read the generic description of the AF process, just nothing that would correspond to the notion that the lens is doing the AF.

Focus is achieved by the movement of element group(s) within the lens.  Canon EF lenses have a motor within the lens that moves the focusing group.  The 1-series bodies are able to drive that motor faster. The camera tells the motor in the lens how far and which direction to move.

7661
Lenses / Re: EF-S 17-85mm f/4-5.6 Upgrade?
« on: March 07, 2013, 03:06:28 PM »
Is the 17-85 worth the upgrade? Should I stick with my 18-135 and save up for better glass?

Door number two.

The 15-85 would be a step up from the 18-135's in IQ, the 17-85 would not.  As for the 17-55, the draw there is a constant f/2.8 - useful for low light and portraits.

7662
EOS Bodies / Re: Canon EOS 6D Firmware by June? [CR1]
« on: March 07, 2013, 02:30:16 PM »
Pardon my ignorance, but what does the center focus point at f/8 acutally mean?

That the camera will autofocus with an f/8 lens attached (i.e. an f/5.6 lens with a 1.4x TC or an f/4 lens with a 2x TC).

7663
EOS Bodies / Re: Canon EOS 7D Mark II Information [CR1]
« on: March 07, 2013, 02:29:02 PM »
I don't think I'm missing the point, the point is the lens motor is powered neither at 11.1 V nor at 7.2 V. It is powered at a voltage which I don't know, but which is undoubtedly the same whichever body you are using whith whatever battery voltage/number of batteries you are using. The lens is NOT powered directly from the battery, but from a circuit which delivers constant voltage whichever body/battery combo you are using.

If the lens motor was receiving the same power from a 1D X and a 7D, then the AF speed for the lens would be the same with both bodies.  But it's not, it's faster with the 1D X.

Could it be firmware trickery on the part of Canon, the 7D delivers the same power as the 1D X, but the 7D just tells the lens to AF slower?  Possible, I suppose...but that seems a little too cynical, even for me.   :P

7664
Lenses / Re: DPReview: Canon EF 24-70 f/2.8L II Review
« on: March 07, 2013, 02:25:20 PM »
[...]
Of slightly more concern are the ~30% of shots taken between 70-105mm, but I suspect the better IQ will make that a worthwhile trade.
[...]
What is the percentage for the range of, let's say 80-105? I doubt you will 10mm much at that focal length, assuming that cropping from a 70mm FOV to 80mm FOV will not degrade IQ much

80-105mm is ~25%, and as expected there's a spike at the end of the zoom range.  Also worth noting is that I shoot quite a lot at the wide end (30% of my shots are at 24mm), and there in particular the 24-70 II is significantly better than the 24-105 from an IQ standpoint.

I think I'm talking myself into selling the 24-105L.  Did I mention that last night, I shot a few pics of the lens for a CL listing?   ;)

7665
EOS Bodies / Re: Canon EOS 7D Mark II Information [CR1]
« on: March 07, 2013, 02:14:17 PM »

It almost certainly will not be that cheap.  I'd expect a camera that's billed as a 'mini 1D X' to be priced in the $3500-$4000 range.

No, the 1D4 and all had larger mirror boxes, 1.25-1.3x crop sensors and times have changed. Not that it will be 7D launch price either of course.

We'll see (actually, we probably won't, since this is a CR1 rumor after all).  But if it's really a mini-1D X, I suppose it depends on how you define that.  If that means performance like the 1D X in most of the top line parameters (fps, AF system, etc.) but with a crop sensor, that may well come in at $2500 or $3000.  But I was thinking more along the lines of a 1D IV with a crop sensor - long shutter durability, 1/300 s Xsync, the tank-like build and sealing of the 1-series to go with the integrated grip, etc.  Canon has demonstrated that they're quite willing to charge high prices.

I do think my viewpoint is more in line with the previous comment about it being not a 7DII but a 4D, or whatever.  But I admit, I'm just wishing out loud for the feature set that appeals to me...

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