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Messages - neuroanatomist

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6136
Lenses / Re: 24-105L or Sigma 35.1.4 for 6D walk-around
« on: April 27, 2013, 10:45:40 PM »
Regarding what I shoot in that range when traveling, it would be cityscapes/architecture, gardens, monuments and such outdoors, plus historic buildings and museums/aquariums indoors (when allowed). I'd also use the 6d for crowd shots and step in closer for some detail on individuals when I shoot events for local non-profits (my only semi-pro activity).

To be honest, you could use both.  I really like my 35/1.4 (Canon L bought a couple of years ago, today I would quite possibly get the Sigma) as a nighttime walkaround lens.  For architecture, 35mm often isn't wide enough (although the barrel distortion of the 24-105 is a problem for architecture).  The IS on the 24-105 is good in museums - you get the f/1.4 shutter speed without the f/1.4 thin DoF.

6137
Lighting / Re: Should I buy a Speedlite?
« on: April 27, 2013, 07:42:22 PM »
I suggest avoiding on-camera flash like the plague, unless there's a white ceiling or wall off which to bounce that flash.  For pics of two people, a fast lens isn't as helpful as you'd think - yes, you can keep ISO down with f/1.4 or f/1.8, but DoF will be thin, and prom couples would prefer to both be in focus, I expect.  Of the two options, I'd get the 430EX II, but get it off-camera with a light stand, umbrella, and 'dumb' wireless triggers.

But I'd recommend neither.  A one-Speedlite portrait isn't going to make many people happy. My advice - rent.  Lensrentals.com has a two-monolight kit (with stands, wireless triggers, one softbox and one umbrella, for $133 + $35 shipping for a 5-day rental. 

6138
Canon General / Re: How much would you pay?
« on: April 27, 2013, 02:48:13 PM »
Depends - would the cup of coffee (or tea, as the case may be) include an NDA and disclosure of upcoming plans?  Somehow I doubt Tim Cook will divulge the details of the iPhone 6 or the forthcoming iWatch and iToaster...

6139
That's the crux of the issue right there.  100 2.8 used is $400.  Tubes or attachments are half that cost.  For what I'm thinking, is the difference going to be that substantial?  (And there comes the key...I will notice it, but will my clients?)

Your clients likely won't notice an IQ difference.  You might not, even.  What you will notice is the difference in convenience.  You posted two examples (rings with box and rings on stick) - you'd need a different combo of tube(s) + lens for a tightly framed shot of each (less mag to include the box).  The 100/2.8 (or any true macro lens) gives you the flexibility to focus from infinity to 1:1, so you can get the framing you want in minimum time.  So it may come down to whether or not you can count in having time during the wedding shoot to muck about with tubes, or not. After all...time is money.

6140
If I am reading this right then the tube would work nice with my 50 mm 1.4?

A 25mm tube on the 50/1.4 would give you 0.53x - 0.68x mag at 4.33" - 3.25" working distance.  A 12mm tube on the 50/1.4 would give you 0.24x - 0.39x mag at 8.9" - 5.6" working distance. 

6141
Lenses / Re: 24-105L or Sigma 35.1.4 for 6D walk-around
« on: April 27, 2013, 01:41:13 PM »
What do you plan to shoot while walking around with a 'walkaround' lens?  A 35mm prime doesn't offer a lot of flexibility.  FWIW, f/4 on FF is like f/2.5 on APS-C for DoF.  The 24-105L is a great general purpose lens on FF.

RE keeping the 50D, at low ISO the 6D image cropped to the APS-C FoV will give equivalent IQ (but only 7.8 MP); above ISO 800 the cropped 6D's IQ will be better.

6142
When my aging 24-105 died, I found an excellent used copy of the original 24-70 for slightly more than 1000. I've since seen others in that price range.

Me, too...but only before the MkII came out.  Now, I see them in the $1200-1400 range.

6143
I've used tubes and close-up lenses, and I have the 100 L Macro.  All have pluses and minuses. 

Tubes: work best with short focal lengths (added mag is focal length / tube length), no optics so no direct effect on IQ, some lost light (autoexposure compensates).  The 40/2.8 with a 25mm tube works quite well.

Close-up lenses: work best with tele lenses (70-100mm is 'break even' between tubes and close-up lenses), no light loss, fixed working distance (front element to subject is 50cm with 500D, 25cm with 250D), slight optical decrement (but it was hard for me to distinguish the 100 L from the 500D on a 70-200 II in terms of IQ)

Macro lens: best IQ, most flexibility, most expensive

6144
Have you guys heard about the 24-70 f4? I just don't understand this lens... Does it have better IQ then the 24-105 f4?

IQ is similar (slightly better at some focal lengths, worse at others).  It's a little smaller and lighter. Main advantage is the 24-70/4 IS is also a near-macro lens.  This morning I needed to switch from my 24-70/2.8 II to the 100L for some close-ups (0.4-0.5x), wouldn't have had to do that with the 24-70/4.  But that doesn't happen often enough to make the 24-70/4 interesting to me, especially at its current price.

6145
Not exactly a 'favorite' but I couldn't get by without unsharp mask.

6146
Lenses / Re: EF 200-400 f/4L IS 1.4x Release Date [CR1]
« on: April 27, 2013, 08:59:03 AM »
...May 14, 2013 is the day the lens will be officially announced with availability coming in September/October 2013

Gee, that's nice.  But then, the MkII supertele lenses were officially announced with availability about 6 months later...and then it was 14-18 months before the lenses were actually available.

6147
Software & Accessories / Re: Tripod- RRS or Gitzo with rebate??
« on: April 27, 2013, 04:44:07 AM »
You really can't go wrong with either.  Personally, I thing RRS is just a little more right.  ;)

6148
EOS Bodies - For Stills / Re: Why do we buy Canon? What idiots are we?
« on: April 27, 2013, 04:38:53 AM »
At least only one of us 'idiots' on this forum doesn't know the difference between a lens and a camera, dilbert.

6149
Software & Accessories / Re: Screw-on ND filter for 16-35 II
« on: April 26, 2013, 07:03:56 PM »
You shouldn't see additional vignetting with the F-Pro mount on the 16-35L II.



6150
Normally at low power, the flash only partially discharges and can keep on going even while its recharging.

IIRC, that's controlled by a C.Fn on the flash. I wonder if being an RT slave affects that?  Another function has the slaves report back when recharged, and the master beeps when all slaves have reported - maybe that forces a wait until all slaves are charged, so turning it off may help.

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