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 11 Nov 2009 (Wednesday) 13:28
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

70-200mm 2.8 IS - needs different MA for different distances

 
psxindo
Senior Member
419 posts
Joined Mar 2007
Location: So Cal
     
Nov 11, 2009 13:28 |  #1

I'm not sure if this is the camera or the lens.
I'm using 7D

@ 200mm f2.8 on both
when I shoot something at around 10 ft, I would need +5 MA
but when I shoot something at around 40 ft, I would need +15 MA

Would this be a lens issue, and I need to send it in... since it's still under warranty?


5D mkIII | 5D mkII | 6D | EOS M | 16-35L | 24-70L | 70-200L 2.8 IS mkII | EF-M 22 | 50 1.4 | 85L | 100 2.8 macro | Tamron 17-50 2.8 | 2x 580 ex II | 580 ex | 2x sunpak 383 | 134GB CF |
Wishlist | 14L | 24L | 35L | 50L | 100L macro | 135L | 15 2.8 FE | 17L 4 TS | 45 2.8 TS | 90 2.8 TS |

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)
gasrocks
Cream of the Crop
Avatar
13,431 posts
Likes: 1
Joined Mar 2005
Location: Portage, Wisconsin USA
     
Nov 11, 2009 13:35 |  #2

Have you ruled out all other variables besides the lens?


GEAR LIST
_______________

  
  LOG IN TO REPLY
Todd ­ Lambert
I don't like titles
Avatar
12,625 posts
Gallery: 9 photos
Likes: 123
Joined May 2009
Location: On The Roads Across America
     
Nov 11, 2009 13:41 |  #3

This is the major problem with MA. I wish Canon would add at least one more preset to it. So, then you can MA for short and for long.

Or of course, you can just gets primes instead. ;-)a




  
  LOG IN TO REPLY
psxindo
THREAD ­ STARTER
Senior Member
419 posts
Joined Mar 2007
Location: So Cal
     
Nov 11, 2009 13:48 |  #4

The problem is not with the focal length, but the distance of the subject.

Todd Lambert wrote in post #8997276 (external link)
This is the major problem with MA. I wish Canon would add at least one more preset to it. So, then you can MA for short and for long.

Or of course, you can just gets primes instead. ;-)a


5D mkIII | 5D mkII | 6D | EOS M | 16-35L | 24-70L | 70-200L 2.8 IS mkII | EF-M 22 | 50 1.4 | 85L | 100 2.8 macro | Tamron 17-50 2.8 | 2x 580 ex II | 580 ex | 2x sunpak 383 | 134GB CF |
Wishlist | 14L | 24L | 35L | 50L | 100L macro | 135L | 15 2.8 FE | 17L 4 TS | 45 2.8 TS | 90 2.8 TS |

  
  LOG IN TO REPLY
Todd ­ Lambert
I don't like titles
Avatar
12,625 posts
Gallery: 9 photos
Likes: 123
Joined May 2009
Location: On The Roads Across America
     
Nov 11, 2009 13:54 |  #5

If you have someone 10ft away and you are at 70mm. Then the person is 40ft and you're still at 70mm? That type of thing?




  
  LOG IN TO REPLY
psxindo
THREAD ­ STARTER
Senior Member
419 posts
Joined Mar 2007
Location: So Cal
     
Nov 11, 2009 14:05 |  #6

yes, but both at 200mm.


5D mkIII | 5D mkII | 6D | EOS M | 16-35L | 24-70L | 70-200L 2.8 IS mkII | EF-M 22 | 50 1.4 | 85L | 100 2.8 macro | Tamron 17-50 2.8 | 2x 580 ex II | 580 ex | 2x sunpak 383 | 134GB CF |
Wishlist | 14L | 24L | 35L | 50L | 100L macro | 135L | 15 2.8 FE | 17L 4 TS | 45 2.8 TS | 90 2.8 TS |

  
  LOG IN TO REPLY
Todd ­ Lambert
I don't like titles
Avatar
12,625 posts
Gallery: 9 photos
Likes: 123
Joined May 2009
Location: On The Roads Across America
     
Nov 11, 2009 14:20 |  #7

Hmm, not sure, but object distance shouldn't matter. It either front focuses or it back focuses which you can correct with MA. If it's doing something other than those, then yes, probably need to send it in.




  
  LOG IN TO REPLY
Canon ­ Bob
Goldmember
2,058 posts
Likes: 51
Joined May 2007
Location: Poitou-Charentes, France
     
Nov 11, 2009 14:25 as a reply to  @ Todd Lambert's post |  #8

At 10 feet then there's a chance that aberrations may be influencing the AF performance a little. Logically, most of us would use the centre AF point for a test like this but it would be interesting to see if the results differed using one of the outer points (appreciating that overall AF accurracy might be degraded)

Bob


1Dx2 (2), 5DSR, 1Ds3, 1D4, 5D2(590nm), 5D2(720nm) EF600 EF400 EF300-II EF300 EF200 EF200-II EF180L EF135L EF100 EF85-II EF50L TS-E17/4 TS-E24L-II TS-E45 TS-E90 MP-E65 EF70-200-II EF24-70/2.8-II EF16-35/4 EF8-15/4 EF11-24/4 Zeiss 15/2.8 21/2.8 25/2 28/2 35/1.4 35/2 50/2 85/1.4 100/2 135/2 T/C's L-SC & a WIFE!

  
  LOG IN TO REPLY
psxindo
THREAD ­ STARTER
Senior Member
419 posts
Joined Mar 2007
Location: So Cal
     
Nov 11, 2009 14:54 |  #9

yes, when testing I used center focus point only.

Basically, when shooting something around 10 ft away, I would need +5 MA, but when farther away at around 30-40 ft with the same +5 MA, it would be front focusing. Which need a +15 MA to get a sharp picture.


5D mkIII | 5D mkII | 6D | EOS M | 16-35L | 24-70L | 70-200L 2.8 IS mkII | EF-M 22 | 50 1.4 | 85L | 100 2.8 macro | Tamron 17-50 2.8 | 2x 580 ex II | 580 ex | 2x sunpak 383 | 134GB CF |
Wishlist | 14L | 24L | 35L | 50L | 100L macro | 135L | 15 2.8 FE | 17L 4 TS | 45 2.8 TS | 90 2.8 TS |

  
  LOG IN TO REPLY
Mr. ­ Clean
Cream of the Crop
Avatar
6,002 posts
Likes: 3
Joined Jul 2005
Location: Olympia, Washington
     
Nov 11, 2009 15:25 |  #10

What does +15 look like at 10ft? 10ft I think is too close to MA that lens at 200mm though in my opinion.


Mike
some shots @ Zenfolio (external link)
Gear List

  
  LOG IN TO REPLY
garycoleman
Senior Member
450 posts
Likes: 12
Joined Aug 2008
Location: California
     
Nov 11, 2009 15:46 |  #11

get it calibrated. I got my 70-200 2.8 IS repaired and it's the sharpest at 0 MA with my 7D


Canon 5D MKIII | Canon 60D | 24-70mm f/2.8L II | 17-55mm f/2.8 IS | 70-200mm f/2.8L IS | 580EX II

  
  LOG IN TO REPLY
Chez ­ Wimpy
Senior Member
Avatar
430 posts
Joined Jun 2008
Location: Hokkaido, Japan
     
Nov 11, 2009 17:52 |  #12

Yes, I certainly have this problem as well. With the 70-200/2.8IS I haven't much bothered switching up the MA (not so critical to my work, I got it set at about 25 meters and let it be), but with my 85L, it is mandatory if I want to get acceptable results at f1.2. Head-shoulders portraits is +0 but for full-body distances, +5. I learned this the hard way after my first time going outside with the lens and losing about 1/2 the shots to FF.


-CW
生きのいい魂が手に余る
5D2 - 20D - 550D
Canon 24LII - 35
- 50II - 85 - 85L - 135L - 300/4 - 70-200/2.8IS - TSE 24L2 - 90
Sigma 15 - 30 - 50 - 12-24

  
  LOG IN TO REPLY
gte357s
Senior Member
489 posts
Joined Mar 2009
     
Nov 11, 2009 19:34 |  #13

Todd Lambert wrote in post #8997476 (external link)
Hmm, not sure, but object distance shouldn't matter. It either front focuses or it back focuses which you can correct with MA. If it's doing something other than those, then yes, probably need to send it in.

No .. from my observation and testing of my 70-200 F4 and Tamron 60mm F2 macro. The distance to object (focus distance) do matters in some of the lens. For example, it is well know that the 70-200 image is soft (or actually cannot focus) at the minimum focus distance (MFD) of 1.2m at focal length of 200mm.

When I test the Tamron 60mm F2 macro, it is even worse. It focus ok at macro distance (0.3m-1m), then it becomes front focus as I step back (~1.5m), then it becomes back focus if I am very far away (>4m) from the object.

Now, I can understand why prime is preferred by some people. I think it is just technically a lot easier to make a prime that will focus properly, there is one less variable to play with. There are now 3 variables in zoom lens that can impact the image - the aperture, the focus distance, and the focal length.


Canon 5D MK I | Canon 24-70 F2.8 L | Canon 70-200 F2.8 L IS I | Sigma 85 F1.4 | Tamron 1.4x TC | Canon 430 EXII

  
  LOG IN TO REPLY
psxindo
THREAD ­ STARTER
Senior Member
419 posts
Joined Mar 2007
Location: So Cal
     
Nov 13, 2009 02:21 |  #14

Would sending it in fix the problem?


5D mkIII | 5D mkII | 6D | EOS M | 16-35L | 24-70L | 70-200L 2.8 IS mkII | EF-M 22 | 50 1.4 | 85L | 100 2.8 macro | Tamron 17-50 2.8 | 2x 580 ex II | 580 ex | 2x sunpak 383 | 134GB CF |
Wishlist | 14L | 24L | 35L | 50L | 100L macro | 135L | 15 2.8 FE | 17L 4 TS | 45 2.8 TS | 90 2.8 TS |

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

2,044 views & 0 likes for this thread
70-200mm 2.8 IS - needs different MA for different distances
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 persie Sindhu
939 guests, 330 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.