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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 22 Aug 2013 (Thursday) 19:29
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Question about Rokinon 14mm 2.8. How do you focus?

 
paparios
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Aug 23, 2013 13:02 |  #16

paparios wrote in post #16233144 (external link)
Right on. Besides that, if you use the DOF calculator and, say, focus at 10 km, anf f5.6 the results are not quite different (sharp from 0.581 meters to infinity). This is the main issue with this type of lens, because of the gigantic depth of field they have.

Miguel

As an example, the following table shows the result of a 14mm lens at f5.6, when the target is at a given distance:

1 meter. Hyperfocus at 1.17 meters. Sharp from 0.585 to infinity.
10 meters. Hyperfocus at 1.17 meters. Sharp from 0.585 to infinity.
100 meters. Hyperfocus at 1.17 meters. Sharp from 0.585 to infinity.
1000 meters. Hyperfocus at 1.17 meters. Sharp from 0.585 to infinity.
10000 meters. Hyperfocus at 1.17 meters. Sharp from 0.585 to infinity.

In other words, you do not need to refocus the lens, just put the focus ring at 1.1 meters and your are done. That is how I use mine.

Look the example and crop below, including the details on the trees and inside the house, compared with the yellow snow post in the foreground.

Miguel


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Canon 5D MKII, Sony A7, Canon EOS M, Canon 7D, Sony A6000, Canon 50d with grip, Canon 400D with grip, Bower 14 f2.8, Bower 35 f1.4, EF 40 f2.8, Tokina 12-24 f4, EFM-22 f2 STM, EFM 18-55 f3.5-5.6 IS STM, EFS 18-55 f3.5-5.6, Tamron 28-75 f2.8, EF 85 f1.8, EF 100 f2.8L IS, EF 70-200 f4L IS, EF 75-300 f4-5.6, Sigma 150-500 f5-6.3, Sony E 16-50, Sony FE 28-70

  
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vengence
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Aug 23, 2013 13:15 |  #17

+1 to what people said above about live view 10x to focus if you are tripod mounting, or just hyperfocus for most shots.

I wanted to add if you want to focus through the view finder, you'll probably want to replace the focus screen on your camera with one of the old SLR style prism ones. An example of what those look like and how you use them can be found here (external link):




  
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Rafromak
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Aug 23, 2013 13:30 |  #18

vengence wrote in post #16233796 (external link)
+1 to what people said above about live view 10x to focus if you are tripod mounting, or just hyperfocus for most shots.

I wanted to add if you want to focus through the view finder, you'll probably want to replace the focus screen on your camera with one of the old SLR style prism ones. An example of what those look like and how you use them can be found here (external link):

I find it quite difficult trying to adjust the lens' focus on moving subjects such as the Auroras. In this case it's easier to focus the lens using the marks on the lens barrel using a flashlight. But I imagine that focusing with LiveView should do the trick the rest of the time.

Also, the video on how to calibrate the focus system of the lens (link from another poster above) is quite handy.


7D, 5DII

  
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SeattleSpeedster
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Aug 23, 2013 13:40 |  #19

just hyperfocus for most shots
/thread


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Rafromak
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Aug 23, 2013 14:40 |  #20

SeattleSpeedster wrote in post #16233856 (external link)
just hyperfocus for most shots
/thread

Yes, I have to learn more about it.


7D, 5DII

  
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bidkev
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Aug 23, 2013 18:45 |  #21

I've got one of these on the way as I hate live view http://www.ebay.com.au …KON-OLYMPUS-/220754885648 (external link)

If it doesn't help with focusing, at least I can use it for macro work.

For street work I mostly I shoot from the hip at f8 iso 400 with the lens set to 7ft and am rarely OOF, although some perspectives can be a bit weird, but I am rather attracted to that.

IMAGE: http://farm8.staticflickr.com/7281/9527750696_4e8e835dd2_b.jpg

See my fishy photography here: https://kevindickinson​fineartphot.smugmug.co​m/Tropical-Fish-2/ (external link)
Olympus PenF | Olympus OM-D E-M5 mkll x 2 gripped | Olympus OM-D E-M10 mkll gripped | Olympus 12-40 2.8 pro | 14 -150 | 17mm 1.8 | 9mm BCL | Panasonic 12-32 | 25mm 1.7 | Panasonic Leica 8-18 | Panasonic Leica 100-400 | Godox TT685O speedlite

  
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Rafromak
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Aug 24, 2013 01:08 |  #22

bidkev wrote in post #16234579 (external link)
I've got one of these on the way as I hate live view http://www.ebay.com.au …KON-OLYMPUS-/220754885648 (external link)

If it doesn't help with focusing, at least I can use it for macro work.

For street work I mostly I shoot from the hip at f8 iso 400 with the lens set to 7ft and am rarely OOF, although some perspectives can be a bit weird, but I am rather attracted to that.

QUOTED IMAGE

I like the perspective. It makes the photo interesting. By the way, the photo is quite sharp with excellent clarity.

I do use my Tokina 11-16 for taking photos of people indoors, so I am sort of attracted to the out of the ordinary perspective :)


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bidkev
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Aug 24, 2013 01:23 |  #23

Rafromak wrote in post #16235255 (external link)
I like the perspective. It makes the photo interesting. By the way, the photo is quite sharp with excellent clarity.

I do use my Tokina 11-16 for taking photos of people indoors, so I am sort of attracted to the out of the ordinary perspective :)

Me too. The only downside is it shows as 50mm in Exif

IMAGE: http://farm6.staticflickr.com/5340/9512658193_21acdb16ed_b.jpg
IMAGE LINK: http://www.flickr.com/​photos/bidkev/95126581​93/  (external link)
ekka (external link) by bidkev1 (external link), on Flickr

See my fishy photography here: https://kevindickinson​fineartphot.smugmug.co​m/Tropical-Fish-2/ (external link)
Olympus PenF | Olympus OM-D E-M5 mkll x 2 gripped | Olympus OM-D E-M10 mkll gripped | Olympus 12-40 2.8 pro | 14 -150 | 17mm 1.8 | 9mm BCL | Panasonic 12-32 | 25mm 1.7 | Panasonic Leica 8-18 | Panasonic Leica 100-400 | Godox TT685O speedlite

  
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Question about Rokinon 14mm 2.8. How do you focus?
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