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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 20 Dec 2009 (Sunday) 13:27
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16-35 mk II focus confusion

 
montanawild
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Dec 20, 2009 13:27 |  #1

Please forgive me for such a question. THis is my first time with such an ultra wide lens. I am shooting on a 5dmkII and received the lens (brand new) as an early Christmas gift a couple days ago. SO today I set up on the tripod and take some shots outdoors. I used a hyperfocal chart with lens set at manual focus. Now there are very few "hash marks" on this lens distance scale, but I should have been very close. I shot at both f/8 and f/16. I eagerly downloaded the shots and had nothing but mush on the screen. So I go back outside and set the lens to infinity and take a couple more shots and things are much sharper. I guess I am just confused. In the past I always used the hyperfocal chart when doing landscapes with my 50mm and up lenses. Is it just that the 16-35 is so wide that infinity is the best for broad landscapes? Even the very close foreground appears sharper with the lens set to infinity focus. Thanks for any advice in the matter.


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Brett
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Dec 20, 2009 15:25 |  #2

What did you use as hyperfocal distance?

At f/8 and 16mm and hyperfocal distance of 3.55 ft., unless your subject closer is than 4 feet, DoF is from about 2-3 feet to infinity.

So, in shooting a landscape, everything should be in focus with HF distance of 3.55 feet.



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tvphotog
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Dec 20, 2009 16:08 |  #3

How exactly did you set up the hyperfocal distance with the camera on the tripod? Did you swivel the ballhead down to 3.55ft, set focus lock and then swivel back up to take the shot?


Jay
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montanawild
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Dec 20, 2009 16:11 |  #4

I set the focus with the distance scale on the lens. I used 3 1/2 ft @ f/8 and 1 3/4ft @ f/16. At these settings, nothing was sharp at all. But with lens set to infinity, everything was much sharper. Lens performs fine at close distances using center point and autofocus too (just throwing that in there).


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Jay ­ T
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Dec 20, 2009 16:53 |  #5

I did the same thing 4 hrs. ago with the same lens, camera without tripod but Ifocued and recomposed and I got the same results as you .I like to know to whats up with it


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wimg
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Dec 20, 2009 17:24 |  #6

Have a look at this:
http://www.trenholm.or​g/hmmerk/DOFR.html (external link)

Kind regards, Wim


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montanawild
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Dec 20, 2009 17:35 |  #7

Thanks Wim, good read.


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tvphotog
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Dec 20, 2009 20:22 |  #8

wimg wrote in post #9234689 (external link)
Have a look at this:
http://www.trenholm.or​g/hmmerk/DOFR.html (external link)

Kind regards, Wim

I knew that. Only kidding, that's a fascinating article, excellent didactic explanation with real world applications.

Thanks, Wim.


Jay
Ireland in Word and Image (external link) Jay Ben Images (external link)5D IV | 5DS/R | Powershot S100 | 24-105L | 100-400 IIL | 16-35 f/2.8 IIL | 24 T/S f /3.5L II | 17 T/S f/4L | 50mm f/1.2L | 35mm f/1.4L | 70-200 f/2.8L II | 580 EX II | 600 EX-RT | Feisol 3441T/Markins Q3T lever QR | Gitzo 3542L Markins Qi20 BV-22 | Gitzo 5561T RRS MH-02

  
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16-35 mk II focus confusion
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