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 Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 23 Apr 2011 (Saturday) 13:32
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

Question about Micro adjust for 70-200

 
dkim82
Senior Member
Avatar
587 posts
Joined Feb 2009
Location: Garden Grove, CA
     
Apr 23, 2011 13:32 |  #1

Hi- I'm not quite sure if this has been discussed- I'm on my iPhone, which doesn't allow for me to search for specific things, so sorry if this has already been beaten to death.

I noticed my AF is not quite accurate at 70mm, but decent at 200mm. If I microadjust to compensate for the 70mm range, it messes up the AF for the 200mm range.

Has anyone dealt with this before? Any help is greatly appreciated- thanks!

Dave


5d mk2 - Canon 28-70mm f/2.8L - Canon FD 35mm f/2.8 tilt/shift - Zeiss 35-70mm f/3.4 - Canon 70-200mm f/2.8L IS - Zeiss 85mm f/1.4 -
Epson RD-1 - Voigtlander 35mm f/2.5 Color Skopar
Leica Digilux 2

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)
ilguercio
Member
204 posts
Joined Mar 2011
Location: Southern Italy
     
Apr 23, 2011 13:50 |  #2

I finally bought a 50D and can't understand if my fine tuning is doing anything at all.
I am trying to fine tune my 70-200 2.8 and looks like no matter what regulation i set the result does not change.




  
  LOG IN TO REPLY
Sdiver2489
Goldmember
2,839 posts
Gallery: 2 photos
Likes: 102
Joined Sep 2009
     
Apr 23, 2011 13:56 |  #3

Set it to be either:

1. The best at the range you usually shoot
2. The best at the most critical focal length focus wise(200mm)
3. Decent at both lengths but not perfect at either

or send it in to Canon and see how they do. No guarantees there either. There is a certain degree of "slop" that I'm willing to accept. Are you sure its actually misfocusing and its not just picking up other details in the larger FOV of the 70mm shot?


Please visit my Flickr (external link) and leave a comment!

Gear:
Canon 5D III, Canon 24-70L F4 IS, Canon 70-300L F4-F5.6 IS, Canon 100mm F2.8L IS Macro, Canon 35mm F2.0 IS, Canon 430EX II-RT, Canon 600EX II-RT

  
  LOG IN TO REPLY
ben_r_
-POTN's Three legged Support-
Avatar
15,884 posts
Likes: 12
Joined Nov 2007
Location: Sacramento, CA
     
Apr 23, 2011 14:01 |  #4

Huh, I thought the Micro AF adjustments in the camera bodies were supposed to compensate for the focal variances in zoom lenses as it was a predictable AF difference throughout the focal range. Maybe your issue is more a simple AF adjustment. Perhaps you should send it in...


[Gear List | Flickr (external link) | My Reviews] /|\ Tripod Leg Protection (external link) /|\
GIVE a man a fish and he'll eat for a day. TEACH a man to fish and he'll eat for a lifetime.

  
  LOG IN TO REPLY
Higgs ­ Boson
Goldmember
1,953 posts
Likes: 4
Joined Jan 2011
Location: Texas Hill Country
     
Apr 23, 2011 14:03 |  #5

My plan is to only use MA for primes.... :-)


A9 | A7R3 | 25 | 55 | 85

  
  LOG IN TO REPLY
dkim82
THREAD ­ STARTER
Senior Member
Avatar
587 posts
Joined Feb 2009
Location: Garden Grove, CA
     
Apr 23, 2011 14:04 |  #6

thanks fellas but the replies.

sdiver - i think i'm doing it right. I've got it on a tripod, using center af point with a remote shutter release. it was indoor with a flash @1/200sec shutter speed - admittedly, a slower shutter speed, but the test was done for both 70 and 200mm under the same conditions - and the 70mm was consistently softer.

sigh - for a $1000, I wish it could be sharp at all ranges


5d mk2 - Canon 28-70mm f/2.8L - Canon FD 35mm f/2.8 tilt/shift - Zeiss 35-70mm f/3.4 - Canon 70-200mm f/2.8L IS - Zeiss 85mm f/1.4 -
Epson RD-1 - Voigtlander 35mm f/2.5 Color Skopar
Leica Digilux 2

  
  LOG IN TO REPLY
dkim82
THREAD ­ STARTER
Senior Member
Avatar
587 posts
Joined Feb 2009
Location: Garden Grove, CA
     
Apr 23, 2011 14:07 |  #7

ya - it seems to make more sense to use the ma with primes, but i thought i'd give it a shot with the 70-200 and discovered at the wide end, it was a little soft

i'm gonna be at the beach on a shoot this afternoon - let's see how it goes in a bright real life situation. thanks for the replies everyone!


5d mk2 - Canon 28-70mm f/2.8L - Canon FD 35mm f/2.8 tilt/shift - Zeiss 35-70mm f/3.4 - Canon 70-200mm f/2.8L IS - Zeiss 85mm f/1.4 -
Epson RD-1 - Voigtlander 35mm f/2.5 Color Skopar
Leica Digilux 2

  
  LOG IN TO REPLY
Sdiver2489
Goldmember
2,839 posts
Gallery: 2 photos
Likes: 102
Joined Sep 2009
     
Apr 23, 2011 14:14 |  #8

dkim82 wrote in post #12278714 (external link)
thanks fellas but the replies.

sdiver - i think i'm doing it right. I've got it on a tripod, using center af point with a remote shutter release. it was indoor with a flash @1/200sec shutter speed - admittedly, a slower shutter speed, but the test was done for both 70 and 200mm under the same conditions - and the 70mm was consistently softer.

sigh - for a $1000, I wish it could be sharp at all ranges

Do the same test with contrast detect autofocus and also test all your focus points. Each one can be have differently. My 24L is Adjusted to be best with the center focus point and decently accurate with every other point. In the field it probably won't matter much as these errors I'm seeing are in very controlled scenarios and very minor.

Post your shots on here as well for evaluation


Please visit my Flickr (external link) and leave a comment!

Gear:
Canon 5D III, Canon 24-70L F4 IS, Canon 70-300L F4-F5.6 IS, Canon 100mm F2.8L IS Macro, Canon 35mm F2.0 IS, Canon 430EX II-RT, Canon 600EX II-RT

  
  LOG IN TO REPLY
dkim82
THREAD ­ STARTER
Senior Member
Avatar
587 posts
Joined Feb 2009
Location: Garden Grove, CA
     
Apr 23, 2011 14:17 |  #9

will do sdiver


5d mk2 - Canon 28-70mm f/2.8L - Canon FD 35mm f/2.8 tilt/shift - Zeiss 35-70mm f/3.4 - Canon 70-200mm f/2.8L IS - Zeiss 85mm f/1.4 -
Epson RD-1 - Voigtlander 35mm f/2.5 Color Skopar
Leica Digilux 2

  
  LOG IN TO REPLY
dkim82
THREAD ­ STARTER
Senior Member
Avatar
587 posts
Joined Feb 2009
Location: Garden Grove, CA
     
Apr 23, 2011 14:20 |  #10

hey it's saturday everyone - time for a laugh:

http://www.youtube.com​/watch?v=32wC5pC5LBQ (external link)

have a beautiful day - happy shooting!


5d mk2 - Canon 28-70mm f/2.8L - Canon FD 35mm f/2.8 tilt/shift - Zeiss 35-70mm f/3.4 - Canon 70-200mm f/2.8L IS - Zeiss 85mm f/1.4 -
Epson RD-1 - Voigtlander 35mm f/2.5 Color Skopar
Leica Digilux 2

  
  LOG IN TO REPLY
cristphoto
Senior Member
869 posts
Likes: 35
Joined Feb 2010
Location: Maryland
     
Apr 23, 2011 19:42 |  #11

Per Canon's instructions you always micro-adjust on the setting that has the least DOF. This means wide open and, if a zoom lens, at the maximum focal length.


5D MKIV, 5D MKIII, 1D MKIV, 24L II, 35L, 50L, 85LIS, 100LIS Macro, 135L, 300LIS, 16-35L, 24-70L, 70-200LIS, 100-400LIS

  
  LOG IN TO REPLY
hollis_f
Cream of the Crop
Avatar
10,649 posts
Gallery: 1 photo
Likes: 84
Joined Jul 2007
Location: Sussex, UK
     
Apr 24, 2011 05:36 |  #12

ben_r_ wrote in post #12278704 (external link)
Huh, I thought the Micro AF adjustments in the camera bodies were supposed to compensate for the focal variances in zoom lenses as it was a predictable AF difference throughout the focal range.

No, it's more complicated than that. I've not bothered with MA on any of my zoom lenses.

ben_r_ wrote in post #12278704 (external link)
Perhaps you should send it in...

Yes, this is the best option if the problem is bad enough to warrant it. If I recall correctly, Canon use a 3-point calibration for zoom lenses.


Frank Hollis - Retired mass spectroscopist
Give a man a fish and he'll eat for a day. Teach a man to fish and he'll complain about the withdrawal of his free fish entitlement.
Gear Website (external link)

  
  LOG IN TO REPLY
ilguercio
Member
204 posts
Joined Mar 2011
Location: Southern Italy
     
Apr 24, 2011 08:06 |  #13

cristphoto wrote in post #12280185 (external link)
Per Canon's instructions you always micro-adjust on the setting that has the least DOF. This means wide open and, if a zoom lens, at the maximum focal length.

I'm trying to do it but it looks like no matter what setting i dial in the AF keeps behaving randomly. There is not a huge difference between -20 and +20 (and there should be a lot of it) .
Did anybody manage to adjust the AF in a definitive way on a bright zoom lens?




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

2,532 views & 0 likes for this thread
Question about Micro adjust for 70-200
FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
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 norm281049
875 guests, 389 members online
Simultaneous users record so far is 6430, that happened on Dec 03, 2017

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.