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 Photography Talk by Genre General Photography Talk 
Thread started 25 Feb 2016 (Thursday) 16:06
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

Diopter Adjustment

 
heldGaze
Senior Member
Avatar
539 posts
Gallery: 13 photos
Likes: 152
Joined Nov 2008
Location: Atlanta, GA
     
Feb 25, 2016 16:06 |  #1

So I think I have a problem with hitting manual focus these days because my right eye is going out of focus now. I've always had 20/20, and still technically do, but there is a slight issue with my right eye. I forget what the eye doc called it now, I have my report buried in my files somewhere.

So I need to learn how to use the diopter adjustment I think in order to correct for my vision anomaly. What's the best way to go about doing that? Do people have a preferred method for adjusting? Because how do I know when the camera is in focus if my eye isn't? I know there is that little knob next to the viewfinder specifically for this, but need to learn how to use it effectively.


Cameras: Sony α7R II, Canon 40D, Samsung Galaxy S7
Lenses: Canon 11-24mm f/4 L, 24-70mm f/2.8 L II, 50mm f/1.8 II, Sigma 18-200mm
Telescope: Meade LXD55 SN-6" F=762mm f/5, with a 2x Barlow T-Mount
Retired Cameras: Canon SD300, Nokia N95, Galaxy S, S3 & S4
C&C Always Appreciated

  
  LOG IN TO REPLY
bsmotril
Goldmember
Avatar
2,517 posts
Gallery: 10 photos
Likes: 236
Joined Feb 2006
Location: Austin TX
     
Feb 25, 2016 16:28 |  #2

All I do is look through the viewfinder at a distant sign far enough away to make reading it challenging, hit the AF button, then adjust the diopter until it looks as clear as possible in the viewfinder. No real science to it.


Gear List
Galleries: http://www.flickr.com/​photos/smopho/ (external link) --- http://billsmotrilla.z​enfolio.com/ (external link)

  
  LOG IN TO REPLY
heldGaze
THREAD ­ STARTER
Senior Member
Avatar
539 posts
Gallery: 13 photos
Likes: 152
Joined Nov 2008
Location: Atlanta, GA
     
Feb 25, 2016 16:45 |  #3

bsmotril wrote in post #17912929 (external link)
All I do is look through the viewfinder at a distant sign far enough away to make reading it challenging, hit the AF button, then adjust the diopter until it looks as clear as possible in the viewfinder. No real science to it.

Cool, I thought that might be all there is to it, but wasn't sure. Thanks for the reply. Prefect vision for 36 years, and now it's starting to go. I don't want glasses man, but I don't think I could touch my eyes to put in contacts.


Cameras: Sony α7R II, Canon 40D, Samsung Galaxy S7
Lenses: Canon 11-24mm f/4 L, 24-70mm f/2.8 L II, 50mm f/1.8 II, Sigma 18-200mm
Telescope: Meade LXD55 SN-6" F=762mm f/5, with a 2x Barlow T-Mount
Retired Cameras: Canon SD300, Nokia N95, Galaxy S, S3 & S4
C&C Always Appreciated

  
  LOG IN TO REPLY
BigAl007
Cream of the Crop
Avatar
7,962 posts
Gallery: 542 photos
Best ofs: 1
Likes: 1597
Joined Dec 2010
Location: Repps cum Bastwick, Gt Yarmouth, Norfolk, UK.
     
Feb 25, 2016 16:56 |  #4

bsmotril wrote in post #17912929 (external link)
All I do is look through the viewfinder at a distant sign far enough away to make reading it challenging, hit the AF button, then adjust the diopter until it looks as clear as possible in the viewfinder. No real science to it.

Even better would be to remove the camera's lens completely, or at least defocus it completely, and then use the little wheel to adjust the image of the focus screen so that the little box around the focus points are as sharp as possible.

What you need when looking into the VF is to see the image of the fous screen clearly. So actually focusing on something that is etched on that screen will give best redults.

If the AF were to be a little out, and you were using the image projected by the lens as your diopter focus tsrget, either you will not get a good point of focus at all, or you could just possibly get the diopter control to fix the slight degree of misfocus.

So you should always use the focus screen itself.

Alan


My Flickr (external link)
My new Aviation images blog site (external link)

  
  LOG IN TO REPLY
heldGaze
THREAD ­ STARTER
Senior Member
Avatar
539 posts
Gallery: 13 photos
Likes: 152
Joined Nov 2008
Location: Atlanta, GA
     
Feb 25, 2016 17:07 |  #5

BigAl007 wrote in post #17912966 (external link)
Even better would be to remove the camera's lens completely, or at least defocus it completely, and then use the little wheel to adjust the image of the focus screen so that the little box around the focus points are as sharp as possible.

What you need when looking into the VF is to see the image of the fous screen clearly. So actually focusing on something that is etched on that screen will give best redults.

If the AF were to be a little out, and you were using the image projected by the lens as your diopter focus tsrget, either you will not get a good point of focus at all, or you could just possibly get the diopter control to fix the slight degree of misfocus.

So you should always use the focus screen itself.

Alan

Thank for your guidance. Much appreciated.


Cameras: Sony α7R II, Canon 40D, Samsung Galaxy S7
Lenses: Canon 11-24mm f/4 L, 24-70mm f/2.8 L II, 50mm f/1.8 II, Sigma 18-200mm
Telescope: Meade LXD55 SN-6" F=762mm f/5, with a 2x Barlow T-Mount
Retired Cameras: Canon SD300, Nokia N95, Galaxy S, S3 & S4
C&C Always Appreciated

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

858 views & 1 like for this thread
Diopter Adjustment
FORUMS Photography Talk by Genre General Photography Talk 
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 Avishakya
1057 guests, 371 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.