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Archive 2012 · Roger posted "Autofocus Reality" Part 3B. The f...
  
 
Fred Miranda
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p.1 #1 · p.1 #1 · Roger posted "Autofocus Reality" Part 3B. The final saga!


Roger Cicala of LensRentals, posted the final chapter 3B on his "Autofocus Reality" series.
In previous articles, he concluded:

1. Phase-detection autofocus (even using still targets and center-point only) wasn’t nearly as accurate as contrast detection.
2. The contrast-detection autofocus was about as accurate as the most careful manual focusing.
3. A few newer lenses did focus as accurately as contrast detection on 5D Mark III cameras but not on 5D Mark II cameras.
4. the newest Canon lenses (40mm f/2.8, 24mm f/2.8 IS, 28mm f/2.8 IS, 70-300mm L IS and 300mm f/2.8 IS II) focus more accurately when mounted to 5D Mark III camera but not on 5D Mark II cameras.

Here is an excerpt from this the latest Autofocus Reality Part 3B:
"Since we knew that the newest lenses autofocused accurately on 5DIII but not on 5DII cameras, the next step was obviously to compare an accurate AF lens on different camera bodies to see with which ones it was capable of accuracy."

Read the entire Autofocus Reality articles:
Part 1 | Part 2 | Part 3A | Part 3B



Aug 01, 2012 at 11:54 PM
snapsy
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p.1 #2 · p.1 #2 · Roger posted "Autofocus Reality" Part 3B. The final saga!


Wow, there's some really interesting sleuthing in that final article (3B). A must read.


Aug 02, 2012 at 12:01 AM
StillFingerz
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p.1 #3 · p.1 #3 · Roger posted "Autofocus Reality" Part 3B. The final saga!


Thanks for posting the articles Fred, must reads indeed. Guess I'll struggle with me old gears for awhile...at least until someone produces a list of lenses that have rotation detectors built into them


Aug 02, 2012 at 02:10 AM
kaycephoto
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p.1 #4 · p.1 #4 · Roger posted "Autofocus Reality" Part 3B. The final saga!


wow, amazing read to quantify what some others have expressed. many thanks for posting the articles & to Roger for taking the time to get to the bottom of everything!


Aug 02, 2012 at 07:49 AM
Monito
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p.1 #5 · p.1 #5 · Roger posted "Autofocus Reality" Part 3B. The final saga!


+ for Roger.



Aug 02, 2012 at 08:53 AM
Tim Ashton
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p.1 #6 · p.1 #6 · Roger posted "Autofocus Reality" Part 3B. The final saga!


It appears, no matter what we shoot, it is the roger Cicala's of this world who are our real friends
Tim



Aug 02, 2012 at 09:06 AM
 

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oldrattler
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p.1 #7 · p.1 #7 · Roger posted "Autofocus Reality" Part 3B. The final saga!


Tim Ashton wrote:
It appears, no matter what we shoot, it is the roger Cicala's of this world who are our real friends
Tim


+ one & thanks Fred



Aug 02, 2012 at 10:00 AM
Schlotkins
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p.1 #8 · p.1 #8 · Roger posted "Autofocus Reality" Part 3B. The final saga!


Thanks for posting this. I wonder if the increased precision of new lenses + new body is limited to those lens with f2.8 or faster maximum aperture? In other words, would say the new 500L or 600L have the same advantages?

Chris



Aug 02, 2012 at 04:36 PM
UCSB
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p.1 #9 · p.1 #9 · Roger posted "Autofocus Reality" Part 3B. The final saga!


This series of blog posts has been the most useful material that I have read in recent years. Highly recommended.


Aug 02, 2012 at 08:42 PM
Sneakyracer
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p.1 #10 · p.1 #10 · Roger posted "Autofocus Reality" Part 3B. The final saga!


Awesome articles! Some real info into the Canon AF System. Ive never seen such insight published.


Aug 02, 2012 at 09:17 PM
David Baldwin
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p.1 #11 · p.1 #11 · Roger posted "Autofocus Reality" Part 3B. The final saga!


".... the newest Canon lenses (40mm f/2.8, 24mm f/2.8 IS, 28mm f/2.8 IS, 70-300mm L IS and 300mm f/2.8 IS II) focus more accurately when mounted to 5D Mark III camera but not on 5D Mark II cameras"

Hmm

Does that mean that my existing L lenses will also focus more accurately on a 5D3 and subsequent bodies? I have a 24L Mk2, 135L, 24-105 and non IS 70-200 f4. I really don't want to upgrade these lenses, I expect them to be reasonably future proof? Should I be concerned?



Aug 02, 2012 at 09:51 PM
mco_970
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p.1 #12 · p.1 #12 · Roger posted "Autofocus Reality" Part 3B. The final saga!


Thanks for the linky, Fred, and a BIG thanks to Roger for this series of articles & the countless hours it must take to setup and do this testing work!!!


Aug 02, 2012 at 10:04 PM





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