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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 01 Feb 2018 (Thursday) 19:19
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Backfocus with new Canon 85mm f/1.4L?

 
Thorsten
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Feb 01, 2018 19:19 |  #1

My new 85/1.4L just came in, and it back focuses a bit. It is noticeable when taking head shots and focusing on the eye, and I confirmed it with my Spyder LensCal. I had to dial in AF fine tune of -5, then it's pretty spot on. Did anybody else experience this with this lens? All my previous lenses did not need any fine tune.


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Canon 5D3, 80D, 24 IS, 35L, 50/1.8 STM, 85/1.8, 100L, 135L, 400/5.6L, 16-35/4L, 70-200/4L IS, Rokinon 12/2.8

  
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s2kennyc
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Feb 01, 2018 22:44 |  #2

Seems reasonable. This is pretty much the reason why Canon added microadjustment capabilities on their cameras.

-5 doesn’t seem like much at all if it’s now giving you spot on results.


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Thorsten
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Feb 02, 2018 18:59 as a reply to  @ s2kennyc's post |  #3

Thank you! I was a bit worried that I needed to tune it, but it looks it's working good with that.


Thorsten (external link)
Canon 5D3, 80D, 24 IS, 35L, 50/1.8 STM, 85/1.8, 100L, 135L, 400/5.6L, 16-35/4L, 70-200/4L IS, Rokinon 12/2.8

  
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chuckmiller
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Feb 03, 2018 15:06 |  #4

When the range is 40 ticks (20+/-) needing 5 doesn't seem like much. I have maybe 1 lens where the MFA stayed on 0. It would seem uncomfortable to need 19 or 20 but if that nails it then what would it matter.




  
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artsf
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Feb 12, 2018 15:04 |  #5

which camera body are you using it with?
I rented the new 85mm and it was spot on. But all my lenses are spot on with 5div. Same lenses required various degree of AFMA on 6d.




  
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Thorsten
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Feb 20, 2018 01:33 |  #6

Thank you all! Sorry for my delayed response, we were on a trip. My camera is a 5D3. Thank you for letting me know not to worry too much! So far the lens is working out ok with the AFMA of -5. I had dialed in this value after tests with my focus test tool. Interestingly, with real subjects that are close by (portraits), I see little difference in the focus results when I turn AFMA off entirely. But when the subject is farther away, then it shows that focus is spot on only with -5, and not with 0.


Thorsten (external link)
Canon 5D3, 80D, 24 IS, 35L, 50/1.8 STM, 85/1.8, 100L, 135L, 400/5.6L, 16-35/4L, 70-200/4L IS, Rokinon 12/2.8

  
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Backfocus with new Canon 85mm f/1.4L?
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