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Messages - neuroanatomist

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Lenses / Re: Lens align pro or Spyder lenscal
« on: September 05, 2012, 11:01:59 PM »
I've been testing all lenses at 25x and 50x focal length. In real life shooting, it may not make too much difference if you are within +/- 10.

If you mean within +/- 10x of focal length distance, probably true.

If you mean within +/- 10 AFMA units, I'd expect that to make a difference in many situations, either shooting wide open or with close subjects.  One unit is 1/8 the depth of focus at max aperture, so a 10-unit difference is substantial.  A 1-2 unit difference can be noticeable with an f/1.2 or f/1.4 prime, on average, but any given shot will vary a little too, probably in a similar range.  A 3-4 unit difference with an f/4 or f/5.6 lens is probably not too noticeable.

EOS Bodies - For Stills / Re: 1DX Owners: Read This Warning!
« on: September 05, 2012, 10:52:57 PM »
Thanks for the heads-up, Rich!!

I haven't had the issue, but maybe that's because one of the settings I changed on the first day was this:

Go into the orange menu; C.Fn4: Disp/Operation; it's the last choice, "Rec card, img size setting.  You could change this default setting from "Rear LCD Panel" to "LCD monitor."  Now, if you accidentally press the "Card Image Size Selection Button" you will see the setting change on the large LCD screen as it lights up, as opposed to the small dark LCD screen.

Lenses / Re: Lens align pro or Spyder lenscal
« on: September 05, 2012, 08:50:41 PM »
You set the focal length for zooms, and you pick the distance.

EOS Bodies - For Stills / Re: How to enable 50 iso on 5DIII?
« on: September 05, 2012, 07:42:46 PM »
Yes, you need to enable the expanded ISOs, they're off by default.

EOS Bodies - For Stills / Re: Raw, mRaw, sRaw of JPEG
« on: September 05, 2012, 06:11:38 PM »
Unless you're limited by a very old/slow computer, shoot full size RAW.  You can always downsample later. Once you've thrown data away, you can't get it back.  Exception might be a deadline situation with no time for post, when JPG is necessary.

Lenses / Re: Lens align pro or Spyder lenscal
« on: September 05, 2012, 04:15:27 PM »
It works, but is kind of a pain in the ass to align.  Setting up a 400mm on a 7D at 50x length involves a lot of walking back and forth from target to camera making small adjustments and checking. 

There's still tweaking to align to the FoCal target, but the advantage is the target is flat (e.g., taped to a wall), and you're aligning the camera based on input from the computer via tethering.  No more walking back and forth!

Lenses / Re: Lens align pro or Spyder lenscal
« on: September 05, 2012, 03:20:00 PM »
@ Dylan777 - absolutely correct.

Lenses / Re: Lens align pro or Spyder lenscal
« on: September 05, 2012, 02:33:29 PM »
Which is why I am not happy that Canon took out the ability to change the AFMA via the SKDs meaning that programmers can't automate the 1DX and 5D3.

Ditto.  Honestly, I haven't tried the MSC mode - I did almost all my lenses before the 1D X was supported, only have the 70-200 II plus 1.4xIII and 2xII left.  I found that it was pretty easy to use the manual mode - I took two shots each from -20 to -12 and +12 to +20 in 2-unit steps (misfocused in both directions), and 3 shots each from -10 to +10 (misfocused in both directions, third shot without moving the focus ring).  Sounds like a lot, but it actually only took ~10 minutes per set to capture the images.  Then I ran them through the Manual Mode in FoCal Pro.

Lenses / Re: Lens align pro or Spyder lenscal
« on: September 05, 2012, 02:18:16 PM »
I'm thinking about Reikan FocCal Pro, do they provide setup distance for each lens?

You choose the distance.  Canon recommends 50x the focal length, LensAlign recommends 25x the focal length (i.e. about 16' and 8' for every 100mm of focal length, respectively). 

Personally, I test all lenses at both 25x and 50x the focal length (and multiple focal lengths for zooms, wide, tele and 1-3 in between), then look at the overall results to decide the AFMA value(s).  It's going to be a compromise, more data drives a better decision.  I take into account the subject distances with the lens (close for the 85L, far for the 100-400, etc.), the usual DoF (weight close distance more with wide lenses).  It means lots of testing, which is why the automation is great.

Lenses / Re: A New EF 400 f/5.6L Before Photokina? [CR1]
« on: September 05, 2012, 11:29:07 AM »
The 400 F5.6 sells for $1350 in Canada. To get a longer Canon lens you have to be ready to shell out $9690. That's a HUGE jump in price.... and I'd be willing to bet that there is a market for something in between, like a 600 F5.6.

A 600mm f/5.6L would cost at least US$7,500. But a 500mm f/5.6L might come in under US$4,000.

+1.  It's not that f/5.6 lenses are automatically (relatively) inexpensive.  Just check the price of the 800/5.6.  It comes down to the element size required to fill the iris diaphragm with light.   A 600/5.6 tele would have a 107mm front element, which is the same as the 300/2.8.  The longer focal length would translate to a higher price than the 300/2.8, I'd bet ~$8K for a 600/5.6.  Since there's $13K 600/4, and you can get 600/5.6 with a 300/2.8 and 2x TC, I doubt Canon will see much of a market for a 600/5.6. 

Anyway - since I hadn't heard from Canon, chasing it up every day I actually switched over to a D4 setup...

Just curious...what lenses are you routinely using with the D4, and are you pleased with the Nikon counterparts to the Canon lenses you used previously?  Or by D4 did you mean 1D Mark IV?

EOS Bodies - For Stills / Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« on: September 04, 2012, 10:26:31 PM »
my 7 year old 1D Mark IIN and 8 yr old 1D Mark II paired with a third party TC works at f/11 just fine
~ while my 1DX wont.

I don't suppose you have a constant f/4 lens you can try with the Kenko 2x on the 1D X, to see if it works at f/8?

Lenses / Re: Lens align pro or Spyder lenscal
« on: September 04, 2012, 05:53:41 PM »
Where, in the USA, can one purchase the FoCal software?

It's download only, no box version.  PayPal converts US$ to British £, since they're based in England.

EOS Bodies - For Stills / Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« on: September 04, 2012, 02:05:40 PM »
My question is if the Kenko 1.4x TC allows AF with an f/5.6 supertele on a 1D X, does the equivalent Kenko 2x TC allow AF with an f/4 supertele on a 1D X?

EOS Bodies - For Stills / Re: Canon EOS-1D X AF at f/8 with the Kenko 1.4TC
« on: September 04, 2012, 02:04:48 PM »
Wonder if it would also work for the 5DIII.

If you read Art Morris' article, you'll find the answer.  Hint - if you're a 5DIII owner, you won't like the answer.  But it's there. 

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