July 23, 2014, 10:43:11 AM

Author Topic: Canon 24-70 f2.8 II. How much AFMA does your copy need? What's acceptable?  (Read 5761 times)

Viggo

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Mine is +1 at both ends, and it was 0 at 35 and 50, and real world shots confirms this as well.

Mine is 2012 edition (with the old style lens cap) and it is much more consistent with sharp results than the 2013 I exchanged due the infamous clicking noise with the zoom ring.

Up close the 24-70 mk2 is noticeably softer than at a meter or more.
1dx, 24-70 L II, 50 Art, 200 f2.0 L

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iso79

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Dumb question but how do I find out how much AFMA my copy needs and how do go about figuring out how much I need to adjust?
5D Mark III | 5D Mark II | 17-40mm f/4L | 24-70mm f/2.8L II | 35mm f/1.4L | 85mm f/1.2L II | 135mm f/2L

TM

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My mark I was horrible with inconsistent focusing. Sold it for a new Mark II and thankfully my copy is consistently sharp and doesn't require micro-adjustmenting.
Canon 5DIII, 5DII,  24mm TS-E II L, Sigma 35mm ƒ1.4, 50mm ƒ1.4, 85mm ƒ1.2 L II, 100mm ƒ2.8 micro, 200mm ƒ2.0 L IS, 16-35 ƒ2.8 L II, 24-70 ƒ2.8 L II, 24-105m ƒ4, 70-200 ƒ2.8 L II, 3x 580exII

Scott_McPhee

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Dumb question but how do I find out how much AFMA my copy needs and how do go about figuring out how much I need to adjust?


YOu need to run it through some form of calibration check - I recommend FoCal as it really makes it very easy, especially if you have never done it before.

Have a look here http://www.reikan.co.uk/focalweb/

Invertalon

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My 24-70 II needs -3W and +1T.

My previous copy needed -2W and +1T (I returned due to decentered element).

scottkinfw

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W= 0
T= -2
For me, it is an amazing lens.
sek
Cameras: 5D III, 5D II, 50D Lenses:  24-70 208 II, 24-105 f4L, 70-200 f4L IS, 70-200 f2.8L IS II, EF 300 f4L IS, EF 400 5.6L, 600EX-RT, ST-E3-RT

Skulker

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My copy of 24-70 f/2.8 II needs -9 at wide end and 0 at tele end on my 5D III.  My Canon 70-200 f/2.8 II needs 0 at either end, and my 100L also needs 0.  Some of my fast primes including 35L, 50L, 85L II range between -1 and -3. 

A brand new Canon 17-40 f/4L I just borrowed needed -6 at wide and 0 at tele. 

-9 seems a tad too much for a $2100 lens, so I'm just wondering what 24-70 f/2.8 II owners have experienced with AFMA (and 5D III)?  Is it worth sending in the lens to Canon while still under warranty for calibration?

Is my copy of 5D III partly at fault here, as the body seems to need Minus AFMA on lenses, never positive.  The body is out of warranty, but should I send in both the 24-70 II and body to Canon for calibration together (does Canon even calibrate a specific lens+body combo?). 

Any help would be appreciated.

As long as you can get it setup what does it matter. Some people seem to get so worked up about the number and dream up reasons to be unhappy.

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drjlo

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My copy of 24-70 f/2.8 II needs -9 at wide end and 0 at tele end on my 5D III.  My Canon 70-200 f/2.8 II needs 0 at either end, and my 100L also needs 0.  Some of my fast primes including 35L, 50L, 85L II range between -1 and -3. 

A brand new Canon 17-40 f/4L I just borrowed needed -6 at wide and 0 at tele. 

-9 seems a tad too much for a $2100 lens, so I'm just wondering what 24-70 f/2.8 II owners have experienced with AFMA (and 5D III)?  Is it worth sending in the lens to Canon while still under warranty for calibration?

Is my copy of 5D III partly at fault here, as the body seems to need Minus AFMA on lenses, never positive.  The body is out of warranty, but should I send in both the 24-70 II and body to Canon for calibration together (does Canon even calibrate a specific lens+body combo?). 

Any help would be appreciated.

As long as you can get it setup what does it matter. Some people seem to get so worked up about the number and dream up reasons to be unhappy.

A lot of the concern is due to future resale value, ease of sale given full disclosure, etc. 

Skulker

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My copy of 24-70 f/2.8 II needs -9 at wide end and 0 at tele end on my 5D III.  My Canon 70-200 f/2.8 II needs 0 at either end, and my 100L also needs 0.  Some of my fast primes including 35L, 50L, 85L II range between -1 and -3. 

A brand new Canon 17-40 f/4L I just borrowed needed -6 at wide and 0 at tele. 

-9 seems a tad too much for a $2100 lens, so I'm just wondering what 24-70 f/2.8 II owners have experienced with AFMA (and 5D III)?  Is it worth sending in the lens to Canon while still under warranty for calibration?

Is my copy of 5D III partly at fault here, as the body seems to need Minus AFMA on lenses, never positive.  The body is out of warranty, but should I send in both the 24-70 II and body to Canon for calibration together (does Canon even calibrate a specific lens+body combo?). 

Any help would be appreciated.

As long as you can get it setup what does it matter. Some people seem to get so worked up about the number and dream up reasons to be unhappy.

A lot of the concern is due to future resale value, ease of sale given full disclosure, etc.

So you,re worried that someone else will be worried that a lens camera combo will be outside limits. Not much chance of that coming true due to manufacturing tolerances.  I for one am very glad AFMA is on my camera.

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