Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and our Privacy Policy.
OK
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Guest
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

 
FORUMS Sample Photo Archives Lens Sample Photo Archive 
Thread started 19 May 2011 (Thursday) 04:22
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

Samyang 35mm F1.4 UMC

 
ride5000
Goldmember
1,422 posts
Likes: 3
Joined Jan 2008
     
Oct 05, 2012 09:33 |  #2881

jwhittaker wrote in post #15082942 (external link)
Dear Samyangers, please try this and let me know what you get....
Set aperture to 1.4 and looking thru viewfinder at say some books on the shelf (about 4 foot away). Focus your lens so you can see the titles clearly. Press the liveview and compare what you see. On my camera (600d) the titles are blurred, I can't read them. I turn off live view, look through viewfinder I can read the titles again.
Bottom line, my viewfinder is not showing what the photo will look like, it is inaccurate. Weird.

not surprising with oem screen on 600d.

oem screens are typically in the f/2.8-3.5 range, which means they give a false sense of wider DOF when in fact that DOF does not exist at the sensor.

you need a higher precision focusing screen.


flickr (external link)

5dc w/ee-s, rokinon 85mm f/1.4, rokinon 35mm f/1.4, rokinon 8mm f/3.5, sigma 24 f/1.8, canon 35-135 f/3.5-4.5, canon 50mm f/1.8, nikkor s-auto 50mm f/1.4, tokina 11-16 f/2.8, 430ex2, pcb e640, oc-3, st-e2, pixel knight tr332, DiCAPac WPS10, b+w 10 stop nd, hoya hd cpl, kenko ext. tubes, brolly, diy softbox, etc.

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)
jwhittaker
Member
111 posts
Joined May 2011
Location: Devon, England
     
Oct 05, 2012 09:48 |  #2882

ok thanks, that make's sense.


J u s t i n
Canon 600D, Canon 70-200 f2.8 mk2, Canon 15-85mm, Samyang 35 1.4, Canon 50mm F1.8,
Flikr Gallery (external link)

  
  LOG IN TO REPLY
TijmenDal
Goldmember
Avatar
1,214 posts
Likes: 1
Joined Oct 2010
Location: Amsterdam, Netherlands
     
Oct 05, 2012 15:31 |  #2883

IMAGE: http://farm9.staticflickr.com/8177/8057589370_29224cbf36_b.jpg
IMAGE LINK: http://www.flickr.com/​photos/tijmendal/80575​89370/  (external link)
[76/365] - Subway station (external link) by TijmenDal (external link)

btw: no problem with wobble on my Samyang. I have a genuine Samyang, not a Rokinon etc.

//Tijmen
http://www.flickr.com/​photos/tijmendalexternal link

Gear
______________
flickrexternal link
_____________

  
  LOG IN TO REPLY
TijmenDal
Goldmember
Avatar
1,214 posts
Likes: 1
Joined Oct 2010
Location: Amsterdam, Netherlands
     
Oct 05, 2012 15:52 |  #2884

IMAGE: http://farm9.staticflickr.com/8172/8057638908_ca523e0fe7_b.jpg
IMAGE LINK: http://www.flickr.com/​photos/tijmendal/80576​38908/  (external link)
[77/365] - Subway man (external link) by TijmenDal (external link)

//Tijmen
http://www.flickr.com/​photos/tijmendalexternal link

Gear
______________
flickrexternal link
_____________

  
  LOG IN TO REPLY
Simplistic
Goldmember
Avatar
1,443 posts
Likes: 14
Joined May 2012
Location: Los Angeles
     
Oct 05, 2012 16:43 |  #2885

jwhittaker wrote in post #15082942 (external link)
Dear Samyangers, please try this and let me know what you get....
Set aperture to 1.4 and looking thru viewfinder at say some books on the shelf (about 4 foot away). Focus your lens so you can see the titles clearly. Press the liveview and compare what you see. On my camera (600d) the titles are blurred, I can't read them. I turn off live view, look through viewfinder I can read the titles again.
Bottom line, my viewfinder is not showing what the photo will look like, it is inaccurate. Weird.


I don't think it's the viewfinder...

Read the manual about the part about what that little tiny scroll wheel is right next to the viewfinder - calibrate that first, and I think you'll be fine.

Page 39 of the manual:

"Dioptric Adjustment Knob:

Turn the knob left or right until the nine AF points in the viewfinder look sharp"


5D II | Sigma 35mm f/1.4 | Canon 85 f/1.8 | Canon 24-105 f/4 L
WARNING!: Before commenting that my color correction is horrible, please keep in mind that I am colorblind, and that hasn't stopped me from trying.

  
  LOG IN TO REPLY
paradiddleluke
Goldmember
Avatar
3,594 posts
Likes: 44
Joined Nov 2009
Location: Chicago, Illinois
     
Oct 05, 2012 20:06 |  #2886

Here's another from my nautical editorial shoot!

IMAGE: http://farm9.staticflickr.com/8037/8051602565_a39e1034ea_b.jpg
IMAGE LINK: http://500px.com/photo​/15158343  (external link)
Trax Magazine Nautical Editorial (external link) by LukeCS (external link), on 500px

Website (external link) | Chicago Actor Headshots (external link) | Gear | Flickr (external link) | Blog (external link) | 500px (external link) | Youtube (external link) | Facebook (external link)
- Luke S -

  
  LOG IN TO REPLY
Judsonzhao
Goldmember
Avatar
1,198 posts
Likes: 5
Joined Feb 2012
Location: Dallas, TX
     
Oct 05, 2012 20:17 |  #2887

awesome


Fly me away.

  
  LOG IN TO REPLY
jwhittaker
Member
111 posts
Joined May 2011
Location: Devon, England
     
Oct 05, 2012 23:11 |  #2888

^^ nice work Luke.
@simplistic, I just found out from another thread that my OEM focus screen can't show depth of field below 2.8 through viewfinder. So it is basically impossible to accurately focus at f1.4 through viewfinder. Unless you upgrade the focus screen that is.
I might try a new focus screen, but if not I'm going to have to use liveview for wide open, stopped down should be OK thru viewfinder.
If people here are finding that their results are often out of focus wide open, it is probably because of this.
Here's what member 'Wilt' said:
"The issue with dSLRs is that the focus screen has been purposefully made to be BRIGHTER and therefor less precise in its ability to show 'sharp focus'. This is because half of the light is already stolen from the viewfinder and redirected down to the AF sensor!
In film SLRs, all the light goes up to the viewfinder, so the focusing screen can be 'coarser' in its texture...which makes it more precise in depicting sharp focus. And since it gets all the light, it can be coarse-textured without the viewfinder being too dim to use.
So, with the dSLR standard focus screen, it is possible for the viewfinder to SEEM to be in focus, when it actually is not...which is when the Live View screen is a bit blurred.
When you focus first with Live View, the actual focus is sharp, and you can throw it a bit out of focus, and yet the focus screen in the viewfinder still seems to be 'in focus' (but the AF sensor is not fooled)
That is why Canon offers option screens, like the Ex-S screens which are advised for f/2.8 and faster lenses...it is a bit coarser (like the old film SLR focus screen) and it needs to be used with faster lenses so the viewfinder is not too dim."


J u s t i n
Canon 600D, Canon 70-200 f2.8 mk2, Canon 15-85mm, Samyang 35 1.4, Canon 50mm F1.8,
Flikr Gallery (external link)

  
  LOG IN TO REPLY
ilguercio
Member
204 posts
Joined Mar 2011
Location: Southern Italy
     
Oct 06, 2012 06:11 as a reply to  @ jwhittaker's post |  #2889

You will never get a precise focus if you look inside the viewfinder because your eyes tend to have a greater depth of field compared to the lens. That's why a matte screen helps but it's not the final solution. Focusing from LV is the BEST option, period. Then, if somebody wants to be conservative and miss 80% of pictures because of inaccurate focus, he's free to do it.
;)




  
  LOG IN TO REPLY
sircanon
Member
226 posts
Joined Oct 2011
     
Oct 06, 2012 09:25 |  #2890

One of my favorites that i took with this lens

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR

RZ67, Pentax 67, 5D mk II
Add me on Flickr! (external link)
www.camwilliamsphoto.c​om (external link)

  
  LOG IN TO REPLY
c2thew
Goldmember
Avatar
3,929 posts
Likes: 4
Joined Aug 2008
Location: Not enough minerals.
     
Oct 06, 2012 13:05 |  #2891

jwhittaker wrote in post #15082268 (external link)
^^ c2thew, try tightening up those screws. I just declicked mine so have seen the insides, and can see that there's no reason why it should wobble, it must be loose screws.

http://www.youtube.com …PCNK-ZlM&feature=youtu.be (external link)

like i said, there isn't an extreme amount of wobble, it's just the machined tolerances on the lens mount give it a .05mm bit of play.

I've disassembled the lens too and got down to removing the focusing ring but got stuck trying to find the calibration screws for the infinity focus. the rokinon 35mm focuses beyond infinity by about 3mm on the manual focusing ring before it hits the hard stop. I was the one that also posted the declicking video.


Flickr (external link) |Gear|The-Digital-Picture (external link)|The $6 mic | MAGIC LANTERN (external link) | Welding Filter
Go Support Magic Lantern 2.3!!

  
  LOG IN TO REPLY
jwhittaker
Member
111 posts
Joined May 2011
Location: Devon, England
     
Oct 06, 2012 13:14 |  #2892

^^ is that rotational play? I misunderstood, I thought you meant up /down, or side to side wobble. I too have 0.5 rotational play if I force it, but not up and down.


J u s t i n
Canon 600D, Canon 70-200 f2.8 mk2, Canon 15-85mm, Samyang 35 1.4, Canon 50mm F1.8,
Flikr Gallery (external link)

  
  LOG IN TO REPLY
c2thew
Goldmember
Avatar
3,929 posts
Likes: 4
Joined Aug 2008
Location: Not enough minerals.
     
Oct 06, 2012 13:43 |  #2893

correct: rotational play


Flickr (external link) |Gear|The-Digital-Picture (external link)|The $6 mic | MAGIC LANTERN (external link) | Welding Filter
Go Support Magic Lantern 2.3!!

  
  LOG IN TO REPLY
sircanon
Member
226 posts
Joined Oct 2011
     
Oct 06, 2012 18:53 |  #2894

jwhittaker wrote in post #15087473 (external link)
^^ is that rotational play? I misunderstood, I thought you meant up /down, or side to side wobble. I too have 0.5 rotational play if I force it, but not up and down.

c2thew wrote in post #15087559 (external link)
correct: rotational play

Exactly what I was talking about, anyways here's two shots from my trip to New Orleans

IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR


IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
HTTP response: NOT FOUND | MIME changed to 'image/gif' | Redirected to error image by FLICKR

RZ67, Pentax 67, 5D mk II
Add me on Flickr! (external link)
www.camwilliamsphoto.c​om (external link)

  
  LOG IN TO REPLY
ride5000
Goldmember
1,422 posts
Likes: 3
Joined Jan 2008
     
Oct 07, 2012 07:13 |  #2895

c2thew wrote in post #15087456 (external link)
http://www.youtube.com …PCNK-ZlM&feature=youtu.be (external link)

like i said, there isn't an extreme amount of wobble, it's just the machined tolerances on the lens mount give it a .05mm bit of play.

I've disassembled the lens too and got down to removing the focusing ring but got stuck trying to find the calibration screws for the infinity focus. the rokinon 35mm focuses beyond infinity by about 3mm on the manual focusing ring before it hits the hard stop. I was the one that also posted the declicking video.

hyperinfinite focus is fairly easy to solve mechanically: all you need to do is install shims between the mount and the barrel.

i did exactly that on my samyang 85mm.


flickr (external link)

5dc w/ee-s, rokinon 85mm f/1.4, rokinon 35mm f/1.4, rokinon 8mm f/3.5, sigma 24 f/1.8, canon 35-135 f/3.5-4.5, canon 50mm f/1.8, nikkor s-auto 50mm f/1.4, tokina 11-16 f/2.8, 430ex2, pcb e640, oc-3, st-e2, pixel knight tr332, DiCAPac WPS10, b+w 10 stop nd, hoya hd cpl, kenko ext. tubes, brolly, diy softbox, etc.

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)

1,299,929 views & 21 likes for this thread
Samyang 35mm F1.4 UMC
FORUMS Sample Photo Archives Lens Sample Photo Archive 
AAA
x 1600
y 1600

Jump to forum...   •  Rules   •  Index   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset

Not a member yet?
Register to forums
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!


COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and to our privacy policy.
Privacy policy and cookie usage info.


POWERED BY AMASS forum software 2.1forum software
version 2.1 /
code and design
by Pekka Saarinen ©
for photography-on-the.net

Latest registered member is Rower2021
900 guests, 254 members online
Simultaneous users record so far is 15144, that happened on Nov 22, 2018

Photography-on-the.net Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.