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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?

 
td2243
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Aug 22, 2013 19:29 |  #1

I know this sounds completely stupid, but I just got my Rokinon 14mm in the mail today and I'm stumped. Looking through the viewfinder and turning the 'focus ring' does nothing. Everything looks clear through the viewfinder, so how do you focus? Do I have a bad lens out of the box? What am I missing here?




  
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dpds68
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Aug 22, 2013 19:51 |  #2

Are you on MF or AF ?

Not that it would make a great difference , try AF and focus on something near then a far off subject what happens ?

David


Gripped Canon 7D,20D,XT / Tamron 17-50mm 2.8, Canon 85mm f1.8 , 70-200 2.8L,EF50mm1.8 II,Sigma 150-500mm OS, Sigma 105mm 2.8 Macro, Sigma 10-20mm 4-5.6
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DreDaze
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Aug 22, 2013 19:54 |  #3

are the pictures out of focus? at 14mm, DOF is still going to be rather large regardless of the f2.8 aperture...

dpds68 wrote in post #16231848 (external link)
Are you on MF or AF ?

Not that it would make a great difference , try AF and focus on something near then a far off subject what happens ?

David

it's a manual focus lens...


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td2243
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Aug 22, 2013 19:58 |  #4

Okay, so I'm still messing with it. It does change focus, but it is so subtle, how do you even tell if you are in focus? I guess put in it live view and zoom in? At something 3 feet away, I can turn the ring a long way without even seeing a difference.




  
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paparios
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Aug 22, 2013 21:15 |  #5

td2243 wrote in post #16231805 (external link)
I know this sounds completely stupid, but I just got my Rokinon 14mm in the mail today and I'm stumped. Looking through the viewfinder and turning the 'focus ring' does nothing. Everything looks clear through the viewfinder, so how do you focus? Do I have a bad lens out of the box? What am I missing here?

These super wide lenses do not need to be focussed, except in a very few cases. I use hyperfocal focussing: I focus the lens to about 2.3 meters (at f2.8 on a 5DMKII) and everything from 1.8 to infinity will be on focus (see http://dofmaster.com/d​ofjs.html (external link) for details).

Miguel


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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dpds68
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Aug 22, 2013 22:12 |  #6

Okay was not familiar with that Lens .


Gripped Canon 7D,20D,XT / Tamron 17-50mm 2.8, Canon 85mm f1.8 , 70-200 2.8L,EF50mm1.8 II,Sigma 150-500mm OS, Sigma 105mm 2.8 Macro, Sigma 10-20mm 4-5.6
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Rafromak
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Aug 22, 2013 22:28 |  #7

Will probably buy the Rokinon 14mm lens for taking photos of the Auroras with my 5DII. Is is possible focusing to infinite while still maintaining the foreground in focus like I do with my Tokina 11-16 (wide open) and the 7D?


7D, 5DII

  
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2ndviolinman
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Aug 22, 2013 22:35 |  #8

The problem with that lens is that on most of them, the focus scale has nothing to do with where the lens is actually focused, so zone focusing or hyperfocal focusing using the scale on the lens will get you poor results, again, on most of them. I used Liveview at 10 x and made my own focusing scale for use in a hurry, or used Liveview to focus when I had time. actual infinity was at, like 1/2 a meter on the the focus scale- useless.

ps- I sold it


David
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td2243
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Aug 22, 2013 22:46 |  #9

paparios wrote in post #16232063 (external link)
I focus the lens to about 2.3 meters (at f2.8 on a 5DMKII) and everything from 1.8 to infinity will be on focus


I sort of understand this now. Is this assuming there is nothing really in the foreground? In other words, if anything we in the frame closer than 1.8 meters, those objects would be out of focus. Correct? So basically, if I am shooting a cityscape, your 2.3 focus setting should, in theory, put everything in focus?




  
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2ndviolinman
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Aug 22, 2013 23:12 |  #10

I should have been more accurate. When I said "Most of them...", well, I haven't actually tried most of them. The inaccurate focusing scale is a problem on many of these lenses as reported in most reviews and as discussed in many threads. I would actually be interested to know if the problem is sorted out on more recently purchased copies, if anyone has looked at Liveview to confirm focus at distances. Mine was from when they were pretty new on the market. and it frustrated me in a couple of ways. Sorry for the negativity.


David
5Dc, 5Dii, Canon 16-35 f/4L IS, 40/2.8 Pancake, 85/1.8, 100/2.8 Macro, 135/2.0L, 200/2.8L, converted 35mm TS, Sigma 50/2.8 Macro, 70/2.8 Macro, Zeiss ZE 21/2.8, Zeiss Contax 28/2.8, 50/1.7 & 85/2.8, Jena 135/3.5, Voigtlander 90mm f/3.5 APO, Canon 28-135.

  
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Rafromak
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Aug 23, 2013 01:43 |  #11

OK, I found the answer for focusing the 14mm Rokinon to infinity for night photography:
http://intothenightpho​to.blogspot.com …ng-rokinon-14mm-lens.html (external link)


7D, 5DII

  
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wombatHorror
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Aug 23, 2013 03:18 |  #12

td2243 wrote in post #16231805 (external link)
I know this sounds completely stupid, but I just got my Rokinon 14mm in the mail today and I'm stumped. Looking through the viewfinder and turning the 'focus ring' does nothing. Everything looks clear through the viewfinder, so how do you focus? Do I have a bad lens out of the box? What am I missing here?

set to infinity and shoot :lol: (seriously that works for like 95% of shots)




  
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paparios
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Aug 23, 2013 08:52 |  #13

td2243 wrote in post #16232240 (external link)
I sort of understand this now. Is this assuming there is nothing really in the foreground? In other words, if anything we in the frame closer than 1.8 meters, those objects would be out of focus. Correct? So basically, if I am shooting a cityscape, your 2.3 focus setting should, in theory, put everything in focus?

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


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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td2243
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Aug 23, 2013 09:30 |  #14

Rafromak wrote in post #16232544 (external link)
OK, I found the answer for focusing the 14mm Rokinon to infinity for night photography:
http://intothenightpho​to.blogspot.com …ng-rokinon-14mm-lens.html (external link)


AWESOME. Thanks!




  
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Invertalon
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Aug 23, 2013 09:35 |  #15

I once measured my hyperfocal distances out on a piece of paper until I learned them... Not the distances, but what it is on the LENS focus scale since it was so far out of wack.

For example, if the hyperfocal distance was 4' at f/5.6, I put a target a little farther then that away from the camera (just to be sure, let's say 5') and used live view to focus to get maximum sharpness while the lens was wide open. Noted where that point was on the focus scale. I repeated this for f/4, f/8 and f/11.

This way, if I wanted to shoot my hyperfocal distance at f/4, I had it... I would put the lens where I tested it at and stopped the lens down.

Usually though, I kept it at f/8 and 1m for ease of use. This was only my first copy though... My second one I had was quite different and the f/8 and 1m thing did not work and I had different points on the focus scale.


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