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 EOS Digital Cameras 
Thread started 24 Sep 2017 (Sunday) 00:59
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

MicroAdjustment if you need it?

 
russellsnr2
Goldmember
Avatar
1,008 posts
Gallery: 8 photos
Likes: 78
Joined Mar 2005
Location: Greek Island of Rhodes.. Ex. Sussex @ Cumbria
     
Sep 24, 2017 00:59 |  #1

https://learn.usa.cano​n.com …roAdjustGuide_d​esktop.pdf (external link)

Russ


Many Thanks,
Russell.

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)
PCousins
Senior Member
Avatar
576 posts
Gallery: 251 photos
Best ofs: 1
Likes: 4063
Joined Nov 2014
Location: Weston-Super-Mare (UK)
     
Sep 24, 2017 01:07 |  #2

Good Reading, thank you.


Gear List

  
  LOG IN TO REPLY
greyswan
Goldmember
1,076 posts
Gallery: 4 photos
Likes: 314
Joined Dec 2007
Location: Ontario Canada
     
Sep 24, 2017 03:37 |  #3

^^ ditto, thank you.


Chris
A clean house is a sign that my computer's broken...
gallery:https://ephemerastudio​.smugmug.com/ (external link)
Gear: 50D, 300 f4L, 70-200 f4L, 100 1.28 Macro, nifty fifty.

  
  LOG IN TO REPLY
James ­ Crockett
Member
Avatar
175 posts
Likes: 36
Joined May 2017
     
Sep 24, 2017 08:12 |  #4

Thanks OP!




  
  LOG IN TO REPLY
digital ­ paradise
How do I change this?
Avatar
13,069 posts
Gallery: 10 photos
Likes: 5315
Joined Oct 2009
     
Sep 27, 2017 12:19 |  #5

I have this one as well. This procedure says to do it at 50X of the focal length. Our manuals say for best results to do it at the shooting location.

This procedure says

• Shoot test pictures using the lens(es) you normally use, and at the distances you typically use them. In other words, if you're seeing a consistent focus shift when you shoot group pictures at weddings, don't take test shots of a ruler on your desk with a macro lens.

http://www.learn.usa.c​anon.com …oadjustment_art​icle.shtml (external link)

Just thought I'd throw this in because often 50X is impractical for longer lenses.

This is also helpful and it does make a difference.

http://arihazeghiphoto​graphy.com …ment-is-it-always-needed/ (external link)


Image Editing OK

Website (external link) ~ Buy/Sell Feedback

  
  LOG IN TO REPLY
ejenner
Goldmember
Avatar
3,623 posts
Gallery: 66 photos
Likes: 479
Joined Nov 2011
Location: Denver, CO
Post edited 8 months ago by ejenner.
     
Sep 28, 2017 23:54 |  #6

Yes, I must admit I check focus as I shoot and have enough experience to adjust depending on the circumstances and sometimes subject. For initially testing a lens I can tell very quickly and dial something in without a test setup. If you can't get something consistent shooting, then you've probably got other issues.

Second article very good. I should have read that after getting my first long lens. I never realized how bad atmospheric distortions can be.


Edward Jenner
5DIII, 7DII, M6, GX1 II,M11-22, Sig15mm FE,16-35 F4,TS-E 17,Sig 18-250 OS Macro,M18-150,24-105,T45 1.8VC,70-200 f4 IS,70-200 2.8 vII,Sig 85 1.4,100L,135L,400DOII.
http://www.flickr.com/​photos/48305795@N03/ (external link)
https://www.facebook.c​om/edward.jenner.372/p​hotos (external link)

  
  LOG IN TO REPLY
BigAl007
Cream of the Crop
7,697 posts
Gallery: 526 photos
Best ofs: 1
Likes: 1474
Joined Dec 2010
Location: Repps cum Bastwick, Gt Yarmouth, Norfolk, UK.
     
Sep 29, 2017 09:16 |  #7

ejenner wrote in post #18462552 (external link)
Yes, I must admit I check focus as I shoot and have enough experience to adjust depending on the circumstances and sometimes subject. For initially testing a lens I can tell very quickly and dial something in without a test setup. If you can't get something consistent shooting, then you've probably got other issues.

Second article very good. I should have read that after getting my first long lens. I never realized how bad atmospheric distortions can be.


Having been a competitive rifle shooter, usually shooting at longer ranges, I have been fighting with those atmospheric distortions for over 30 years. One really unfortunate problem is that as you improve the quality of the lens the specific distortions caused by the atmosphere actually become more noticeable. So where a cheap lens will just seem to be a little low in contrast etc, the really good quality, expensive, lens will show you what type of distortion you are looking at, in temperatures where you would doubt they could even exist. These effects are also much more pronounced over water, or even wet grasslands. The added water vapour makes the change in refractive index with temperature much larger.

On the bright side, for bird photographers at least, they will be much more evident closer to the ground, and usually once the wind speed gets to about 12 mph they simply can't form. The biggest problem with these effects for a rifle shooter is that they move the location of the image of the target in the same direction as the wind. Often when shooting a smallbore match it will move the image of the target downwind by about as much as the wind will physically move the bullet. This means that you actually have to use twice the correction in order to hit the center of the target. At least as a photographer you don't need to worry about the image not being where you think it is.

Alan


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

  
  LOG IN TO REPLY
gjl711
According to the lazy TF, My flatulence rates
Avatar
54,089 posts
Likes: 1593
Joined Aug 2006
Location: Deep in the heart of Texas
     
Sep 29, 2017 09:34 |  #8

digital paradise wrote in post #18461512 (external link)
...

• Shoot test pictures using the lens(es) you normally use, and at the distances you typically use them. ......

Just thought I'd throw this in because often 50X is impractical for longer lenses.
...

But then again, longer lenses are typically used at more than 50x fl.


Not sure why, but call me JJ.
I used to hate math but then I realised decimals have a point.
.
::Flickr:: (external link)
::Gear::

  
  LOG IN TO REPLY
digital ­ paradise
How do I change this?
Avatar
13,069 posts
Gallery: 10 photos
Likes: 5315
Joined Oct 2009
     
Sep 29, 2017 10:24 |  #9

gjl711 wrote in post #18462728 (external link)
But then again, longer lenses are typically used at more than 50x fl.

This is true however it is still inconvenient. At 560mm I would need 92 feet. I have no facility where I could do this and outdoors is not practical - for me anyway. I'd need roller skates to go back and forth. I'm not 59 anymore :-)

I had a hard time with this for many years. 35 years in print media. If we did not set a gap in the folding component properly it shut a 10 million machine down. The gap had to be 0.0035 = 35 thousands of an inch. I'd question all these different procedures and methods out there. This is precision stuff and even Canon has two different explanations.

Since I adopted FoCal I decided to follow their suggestion. Page 2 describes when a lens settles down. Me thinks 50X is possibly suggested by Canon cover themselves as if not done properly can make it worse. The manual even says not normally needed and can cause AF issues.

http://s449182328.webs​itehome.co.uk …20Test%20Distan​ce_1.1.pdf (external link)

The Distance tool.

http://support.fo-cal.co.uk …tion-target-distance-tool (external link)


Image Editing OK

Website (external link) ~ Buy/Sell Feedback

  
  LOG IN TO REPLY
digital ­ paradise
How do I change this?
Avatar
13,069 posts
Gallery: 10 photos
Likes: 5315
Joined Oct 2009
     
Sep 29, 2017 10:31 |  #10

Forgot to say. Romy Ocon who is member here and at FM who's site name is Liquidstone is a well known and respected birder. He was my BIF mentor except he did not know it ;-)a

He does MFA at MFD. You can't argue with success. At one time someone here mentioned a company in Europe that did MFA with the long primes at around 21 ft. I never did get a follow when I asked more about it.


Image Editing OK

Website (external link) ~ Buy/Sell Feedback

  
  LOG IN TO REPLY
coopernut
Junior Member
20 posts
Likes: 51
Joined Nov 2012
     
Sep 30, 2017 23:46 |  #11

digital paradise wrote in post #18462748 (external link)
The gap had to be 0.0035 = 35 thousands of an inch.

Did you use one to many zeros after the decimal point or did you mean 35 Ten Thousandths? No offense. Just curious mind you.




  
  LOG IN TO REPLY
digital ­ paradise
How do I change this?
Avatar
13,069 posts
Gallery: 10 photos
Likes: 5315
Joined Oct 2009
Post edited 8 months ago by digital paradise. (2 edits in all)
     
Sep 30, 2017 23:51 |  #12

coopernut wrote in post #18463740 (external link)
Did you use one to many zeros after the decimal point or did you mean 35 Ten Thousandths? No offense. Just curious mind you.

It might be 0.035

I looked it up but I may have misread it. Actually now that I look at it typed that is what it said on the gauge. It has been 10 years. Thanks for pointing it out. No offence taken. :-)


Image Editing OK

Website (external link) ~ Buy/Sell Feedback

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

9,228 views & 3 likes for this thread
MicroAdjustment if you need it?
FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
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 possmo
827 guests, 396 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.