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Messages - neuroanatomist

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Lenses / Re: Announcement on January 8, 2013? New Lenses [CR1]
« on: December 23, 2012, 09:48:19 AM »
I don't think the old 35L will sell for more than it sells now used (max. 1100 USD).

Did you price the 24-70 MkI before the MkII vs. now?  $900-1100 a few months ago, $1400 today. When the MkII came out, retailers immediately raised prices on remaining MkI stock to full MSRP (well above street price), and used prices followed suit.  Same with the 70-200/2.8 IS, and it was about 2 years (i.e. beginning of this year) that used MkI prices returned to their pre-MkII levels.  So I think it's quite probable the same will happen with the 35L...

Lenses / Re: Announcement on January 8, 2013? New Lenses [CR1]
« on: December 23, 2012, 09:29:02 AM »
The plan: wait until 35L II is announced at a very high price, sell 35L for much less than that, but still at least what I paid for it new, then buy 35L II.  :)

EOS Bodies - For Stills / Re: Macro pics - FF or APS-C
« on: December 23, 2012, 09:02:44 AM »
You're overlooking the fact that the smaller pixels of the 60D make it more sensitive to the effects of diffraction.  That starts at f/6.9 on the 60D, but at f/10.1 on the 5DIII. 

Personally, I prefer FF for macro.

You can't really go wrong. Both the 70-200 II and 135L are excellent.  The 135L is a stellar portrait lens, the 70-200 II does very well for portraits on FF and is very versatile.

Software & Accessories / Re: Canon 250D & 500D Lenses
« on: December 23, 2012, 07:16:39 AM »
Talking about IQ. 70-200 at 200mm with 500D gives 0.6x mag, I compared that to the 100L with similar framing.  The 135L with 500D gives 0.48x.

EOS Bodies / Re: Digital equivalence: film tab holders
« on: December 23, 2012, 01:26:41 AM »
Rectangular filters.
Camera in M mode.
Having The Photographer's Ephemeris app on their smartphone.
Running into them before sunrise.


Set the flash to manual, voila, no preflash.

Lenses / Re: attaching lens hoods
« on: December 22, 2012, 07:47:20 PM »
Logic, I'd say.  The hood identifying info and red dot are where they are so that when you're holding the camera by the grip (which is how I hold it, and I suspect that's the norm), and looking down at the hood, the writing and dot are facing you.  The direction of mounting is determined by convention (clockwise tightens).  That means the writing rotates 'down'.

Software & Accessories / Re: Canon 250D & 500D Lenses
« on: December 22, 2012, 07:40:06 PM »
Depends on the lens. For anything shorter than 70-100mm, an extension tube is better.  Longer than 100mm, you're usually better off with the close-up lens.  A tube has no optics - you lose infinity focus, lose a little light (autoexposure compensates), so IQ is the same as the bare lens.  A close up lens costs no light, but your working distance (front element to subject) is fixed at 25 cm for the 250D, 50 cm for the 500D.  That can be a challenge.

I tested the 500D on a 70-200 II vs. the 100L macro, and the results were very similar, but a lesser lens would suffer more.  The 135L should give good IQ, but less mag than a longer lens.

Lenses / Re: Variable length zooms and dust
« on: December 22, 2012, 05:10:39 PM »
Dust-/weather-resistant lenses have o-rings under the switches, but the seal for the barrel extension is generally a brush-type seal that prevents entry of dust/water while allowing air flow so the barrel moves smoothly.  There is a difference in feel when extending/retracting a sealed vs. non-sealed but well-built zoom, e.g. 24-105L vs. 17-55.

EOS Bodies - For Stills / Re: 5d2 officially discontinued.
« on: December 22, 2012, 07:47:04 AM »

Too bad, but not at all surprising.

EOS Bodies - For Stills / Re: 5d2 officially discontinued.
« on: December 22, 2012, 06:13:50 AM »
Source, please?

Technical Support / Re: 5dm3 AFMA Focal results
« on: December 21, 2012, 07:37:04 PM »
I think you should repeat the testing with more light.  Your EV's are quite low, I'd recommend getting them above EV 10.

Just a point of order, to say that EV is not an indication of the amount of light - although most folks think it is.

EV, without an ISO reference is useless to determine light levels.  You can only say that for any given EV, at the same ISO, the lower number means less light, but thats it.

Technically true, but practically, most photographic discussions assume ISO 100 so the EV concept can be applied to real-world situations, such as when Canon indicated the 1D X can AF at EV -2, which moonlight from a full moon.  FoCal also assumes ISO 100.

Lenses / Re: TS-E 24mm II + 2x Mk III Extender
« on: December 21, 2012, 06:16:55 PM »
I've got the both the TS-E 24L II and the 2xIII, but haven't shot with the combo.  I might be able to take a few - would a comparison be helpful, e.g. same shot with the 24-105L at ~48mm?

Lenses / Re: TS-E 24mm II + 2x Mk III Extender
« on: December 21, 2012, 06:13:03 PM »
Extenders only work on 70-200's, 135L's and up

Better not let my TS-E 24L II and extenders read that pearl of wisdom, they might suddenly become incompatible.  :P

FWIW, the TC is ignored in the EXIF metadata, but otherwise they work fine with TS-E lenses...and with the MP-E 65mm, too.

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