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 Post Processing, Marketing & Presenting Photos Video and Sound Editing 
Thread started 05 Mar 2012 (Monday) 21:52
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

funky little quirk..Rokinon 35mm 1.4 (camera question)

 
cms11186
Member
111 posts
Joined Jun 2011
Location: Chicago
     
Mar 05, 2012 21:52 |  #1

I got this lens in a trade last week and well wow, great lens for the money,


One thing I just noticed while using it for video on my 7D is that it looks like the camera is trying to adjust the iso (As if it were on auto iso). 2 things come to mind


1.) The evaluative metering is bugging out
2,) something is wrong with the connectors


thoughts and ideas?


Canon 7D- 16-35IIL24-105L - 135L- 50mm 1.4 - 85mm 1.8 - 28mm 2.8

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)
ChasWG
Goldmember
Avatar
3,640 posts
Likes: 11
Joined Aug 2009
Location: Aurora, CO
     
Mar 06, 2012 17:56 |  #2

More info is probably going to be needed to help you out. So what are the settings you are using when you experience this problem?

Try switching metering settings. I'm not sure why that would be an issue with this lens and not any other, but those 8mm lenses see an awful lot of the world. If you are set to Manual, then the ISO, Aperture and SS should be locked down and only you can change those. Does this happen with any other lens?


Chas Gordon
7D Gripped/40D Gripped/10-24/EF24-70 f2.8L/EF70-200 f4L/EF50 f1.8 Mk I/EF85 f1.8
http://www.flickr.com/​photos/chaswg/ (external link)
http://vimeo.com/user9​461302/videos (external link)

  
  LOG IN TO REPLY
cms11186
THREAD ­ STARTER
Member
111 posts
Joined Jun 2011
Location: Chicago
     
Mar 07, 2012 17:46 |  #3

its the 35mm not the 14mm. Its really strange because it is just on this lens.


Canon 7D- 16-35IIL24-105L - 135L- 50mm 1.4 - 85mm 1.8 - 28mm 2.8

  
  LOG IN TO REPLY
Mr ­ Rogers
Member
Avatar
72 posts
Likes: 8
Joined Oct 2011
     
Mar 07, 2012 17:53 |  #4

I have that lens and I haven't had any problems with it making the camera do anything automatically...
The lens shouldn't have any effect on the camera's functionality...

But like Chas said more info would help.

My camera is a T2i though. Try looking at all of your settings in the menu. Auto lighting optimizer, Movie exposure etc.
Hope you're able to figure it out.


My Gear
Video Production-John Stanford Rogers

  
  LOG IN TO REPLY
cms11186
THREAD ­ STARTER
Member
111 posts
Joined Jun 2011
Location: Chicago
     
Mar 07, 2012 17:58 |  #5

http://www.youtube.com …y9XK7_f8&featur​e=youtu.be (external link)


quick sample, at second 2 youll see the exposure flicker, this was all manual too.


Canon 7D- 16-35IIL24-105L - 135L- 50mm 1.4 - 85mm 1.8 - 28mm 2.8

  
  LOG IN TO REPLY
Mr ­ Rogers
Member
Avatar
72 posts
Likes: 8
Joined Oct 2011
     
Mar 07, 2012 18:03 |  #6

Hmmm... You know i'm not sure, that's really interesting. Can you hear anything within the camera when the brightness changes?


My Gear
Video Production-John Stanford Rogers

  
  LOG IN TO REPLY
cms11186
THREAD ­ STARTER
Member
111 posts
Joined Jun 2011
Location: Chicago
     
Mar 07, 2012 18:11 |  #7

its kind of aggravating as I got this lens to shoot video, and well, those exposure flickers will turn a shot to crud.

the buyer said it had a AF confirm chip installed, maybe thats it?


Canon 7D- 16-35IIL24-105L - 135L- 50mm 1.4 - 85mm 1.8 - 28mm 2.8

  
  LOG IN TO REPLY
cms11186
THREAD ­ STARTER
Member
111 posts
Joined Jun 2011
Location: Chicago
     
Mar 07, 2012 18:30 |  #8

I think it needs to be confirmed....it mentions something about exposure metering.


Canon 7D- 16-35IIL24-105L - 135L- 50mm 1.4 - 85mm 1.8 - 28mm 2.8

  
  LOG IN TO REPLY
msowsun
"approx 8mm"
Avatar
9,250 posts
Gallery: 15 photos
Best ofs: 1
Likes: 282
Joined Jul 2007
Location: Oakville Ont. Canada
     
Oct 16, 2012 08:56 |  #9

I have the same problem using a Manual Focus lens with an AF confirmation chip on my 7D. Funny thing is my 5D Mk II doesn't do it. Here is a Youtube video showing the problem.

http://www.youtube.com​/watch?v=IC-TQiN0CZU (external link)

I think the 7D's advanced metering and/or AF causes a compatibility problems with these AF Confirmation chips.


Mike Sowsun / S110 / SL1 / 80D / EF-S 24mm STM / EF-S 10-18mm STM / EF-S 18-55mm STM / EF-S 15-85mm USM / EF-S 18-135mm USM / EF-S 55-250mm STM / 5D3 / Samyang 14mm 2.8 / EF 40mm 2.8 STM / EF 50mm 1.8 STM / EF 100mm 2.0 USM / EF 100mm 2.8 USM Macro / EF 24-105mm IS / EF 70-200mm 2.8L IS Mk II / EF 1.4x II
Full Current and Previously Owned Gear List over 40 years Flickr Photostream (external link)

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

1,557 views & 0 likes for this thread
funky little quirk..Rokinon 35mm 1.4 (camera question)
FORUMS Post Processing, Marketing & Presenting Photos Video and Sound Editing 
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 richinven
942 guests, 267 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.