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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 06 Dec 2010 (Monday) 10:32
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Two lenses w/ high Microadjust #s

 
Daedalus34r
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Dec 06, 2010 10:32 |  #1

on my 50D, ive noticed that two of my lenses, the 17-55 and 50 prime, require about +17 to be perfectly sharp wide open. The difference is considerable when comparing it to the zero level in the microadjust menu.

I have not taken the time to check my other lenses, but since two lenses require the same high degree of correction, could there be something wrong with my camera body?


BODY :: EOS 7D, EOS 50D
GLASS :: 17-55 f/2.8 , 50 f/1.4 , 70-200 f/4L IS, 150 f/2.8 EX Macro , 10-20 f/4-5.6 EX , 30 f/1.4 EX
EXTRAS :: 430EX II , Kata R-103 Bag , Tenba Messenger Bag :: WISH LIST :: 100 f/2
Sigma 150mm f/2.8 Macro Review

  
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musashi
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Dec 06, 2010 10:36 |  #2

Daedalus34r wrote in post #11404108 (external link)
on my 50D, ive noticed that two of my lenses, the 17-55 and 50 prime, require about +17 to be perfectly sharp wide open. The difference is considerable when comparing it to the zero level in the microadjust menu.

I have not taken the time to check my other lenses, but since two lenses require the same high degree of correction, could there be something wrong with my camera body?


on your 17-55, the +17, is it on the wide end or tele end? just asking coz on mine at 17 i need it at +5, but at 55 i need it at +15. i am seriously contemplating bringing it in to canon service center to get calibrated. probably after the holidays so i still have something to take family pics with.


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EL_PIC
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Dec 06, 2010 10:45 |  #3
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musashi wrote in post #11404137 (external link)
on your 17-55, the +17, is it on the wide end or tele end? just asking coz on mine at 17 i need it at +5, but at 55 i need it at +15. i am seriously contemplating bringing it in to canon service center to get calibrated. probably after the holidays so i still have something to take family pics with.

And thats the problem with MA ...
besides focal length, it will also vary w f stop, lighting, and subject.
Canon cant help with all those variables either.
MA was created by Canon Marketing to reduce camera and lens returns.
It came out with all those Mkiii problems.


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Daedalus34r
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Dec 06, 2010 10:48 |  #4

musashi wrote in post #11404137 (external link)
on your 17-55, the +17, is it on the wide end or tele end? just asking coz on mine at 17 i need it at +5, but at 55 i need it at +15. i am seriously contemplating bringing it in to canon service center to get calibrated. probably after the holidays so i still have something to take family pics with.

I tested this at 55mm f/2.8. When shooting at 17mm i find the focus to be spot on with acceptable sharpness.


BODY :: EOS 7D, EOS 50D
GLASS :: 17-55 f/2.8 , 50 f/1.4 , 70-200 f/4L IS, 150 f/2.8 EX Macro , 10-20 f/4-5.6 EX , 30 f/1.4 EX
EXTRAS :: 430EX II , Kata R-103 Bag , Tenba Messenger Bag :: WISH LIST :: 100 f/2
Sigma 150mm f/2.8 Macro Review

  
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pyrojim
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Dec 06, 2010 10:52 |  #5

EL_PIC wrote in post #11404178 (external link)
And thats the problem with MA ...
besides focal length, it will also vary w f stop, lighting, and subject.
Canon cant help with all those variables either.
MA was created by Canon Marketing to reduce camera and lens returns.
It came out with all those Mkiii problems.


Well that is one way to look at it. I think it would be better worded as to ensure maximum accuracy.

It would be interesting to see if one could program the camera to vary the micro adjustment profile with focusing distance.


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V-Wiz
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Dec 06, 2010 10:58 |  #6

My 50mm 1.8 needed +18, The 24-105 was spot on (0).


Gripped 5D Mark II l 24-105 F/4 L l 70-200 F/4 L l Tokina 12-24 F4 l 50mm 1.8 l Sigma 600 Mirror l B+W KSM CPL l B+W 6stop ND filter l Hitech 0.6 GND l YN-468 Flash l Kenko Pro 300 1.4 TC l Induro Tripod, Vanguard 250 Ballhead.

  
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musashi
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Dec 06, 2010 11:03 |  #7

EL_PIC wrote in post #11404178 (external link)
And thats the problem with MA ...
besides focal length, it will also vary w f stop, lighting, and subject.
Canon cant help with all those variables either.
MA was created by Canon Marketing to reduce camera and lens returns.
It came out with all those Mkiii problems.

So youre trying to say that instead of MA, ill be better off bringing it in for calibration? I didnt even try different f-stops. Just my normal shooting distance, not mfd.


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led ­ hed
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Dec 06, 2010 11:04 |  #8

my 17-55 IS needed +9
mt 7-200 MKII IS is fine at 0.

so ya, canon should have programmed the software to be able to MFA at different focal lengths.

cuz my 17-55 IS and 7D will be going in for calibration.


Rob - "a photographer is a painter, in a hurry!"
Canon 7D ~ Canon EF 70-200mm f/2.8L IS MKII ~ Canon EF-S 17-55mm f/2.8 IS ~ Canon EF 50mm f/1.8 II ~ Canon 430EX ~ Canon EF 2.0X III Telephoto Extender ~ Canon SX230 HS

  
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musashi
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Dec 06, 2010 11:42 |  #9

led hed wrote in post #11404295 (external link)
my 17-55 IS needed +9
mt 7-200 MKII IS is fine at 0.

so ya, canon should have programmed the software to be able to MFA at different focal lengths.

cuz my 17-55 IS and 7D will be going in for calibration.


thanks. im doing the same after the holidays.


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number ­ six
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Dec 06, 2010 14:50 |  #10

Daedalus34r wrote in post #11404108 (external link)
on my 50D, ive noticed that two of my lenses, the 17-55 and 50 prime, require about +17 to be perfectly sharp wide open. The difference is considerable when comparing it to the zero level in the microadjust menu.

I have not taken the time to check my other lenses, but since two lenses require the same high degree of correction, could there be something wrong with my camera body?

Yep. But check your other lenses - better to have more data.

My 50D was a Canon refurb and was calibrated in the process, I figure. All my lenses microadjust to +- 3 or less. My 17-55 is +1 at 55 mm and 0 at 17 mm.

Bear in mind that microfocus adjustment is a software function useful for fine-tuning lenses, but it won't compensate fully for a body or lens that needs mechanical alignment.

Still, if you can get your lenses adequately adjusted at all focal lengths with MFA, you don't really have a problem. But if it were mine I'd have the body adjusted by Canon.

-js


"Be seeing you."
50D - 17-55 f/2.8 IS - 18-55 IS - 28-105 II USM - 60 f/2.8 macro - 70-200 f/4 L - Sigma flash

  
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Daedalus34r
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Dec 06, 2010 15:51 |  #11

number six wrote in post #11405413 (external link)
Yep. But check your other lenses - better to have more data.

My 50D was a Canon refurb and was calibrated in the process, I figure. All my lenses microadjust to +- 3 or less. My 17-55 is +1 at 55 mm and 0 at 17 mm.

Bear in mind that microfocus adjustment is a software function useful for fine-tuning lenses, but it won't compensate fully for a body or lens that needs mechanical alignment.

Still, if you can get your lenses adequately adjusted at all focal lengths with MFA, you don't really have a problem. But if it were mine I'd have the body adjusted by Canon.

-js

yea i remember my 70-200 being crazy sharp, but it could also be that f/4 gives me a wide margin of error with a larger focus plane. I'll see what my macro and uwa focus tests give me

How much does it cost for canon to check it out?


BODY :: EOS 7D, EOS 50D
GLASS :: 17-55 f/2.8 , 50 f/1.4 , 70-200 f/4L IS, 150 f/2.8 EX Macro , 10-20 f/4-5.6 EX , 30 f/1.4 EX
EXTRAS :: 430EX II , Kata R-103 Bag , Tenba Messenger Bag :: WISH LIST :: 100 f/2
Sigma 150mm f/2.8 Macro Review

  
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number ­ six
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Dec 06, 2010 16:09 |  #12

Daedalus34r wrote in post #11405697 (external link)
yea i remember my 70-200 being crazy sharp, but it could also be that f/4 gives me a wide margin of error with a larger focus plane. I'll see what my macro and uwa focus tests give me

How much does it cost for canon to check it out?

I have no real experience with Canon service. I sent them a 30D for an estimate and was quoted $180 plus shipping. I think that's their minimum. I decided to use the loyalty program instead of repairing the 30D.

-js


"Be seeing you."
50D - 17-55 f/2.8 IS - 18-55 IS - 28-105 II USM - 60 f/2.8 macro - 70-200 f/4 L - Sigma flash

  
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Hobbes330i
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Dec 06, 2010 17:26 |  #13

Daedalus34r wrote in post #11405697 (external link)
How much does it cost for canon to check it out?

If the lens and camera are within their warranty periods, it should be free. You may have to pay for shipping to their facility.


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Daedalus34r
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Dec 07, 2010 14:33 |  #14

Hobbes330i wrote in post #11406207 (external link)
If the lens and camera are within their warranty periods, it should be free. You may have to pay for shipping to their facility.

They aren't unfortunately, if anyone has quoted prices for lens alignment, please do share :)


BODY :: EOS 7D, EOS 50D
GLASS :: 17-55 f/2.8 , 50 f/1.4 , 70-200 f/4L IS, 150 f/2.8 EX Macro , 10-20 f/4-5.6 EX , 30 f/1.4 EX
EXTRAS :: 430EX II , Kata R-103 Bag , Tenba Messenger Bag :: WISH LIST :: 100 f/2
Sigma 150mm f/2.8 Macro Review

  
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number ­ six
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Dec 07, 2010 15:23 |  #15

Daedalus34r wrote in post #11411736 (external link)
They aren't unfortunately, if anyone has quoted prices for lens alignment, please do share :)

Once again, I have no personal experience. But those POTNers who have sent lenses in for repair or alignment seem to have paid about $120 as the basic labor charge.

But it sounds as if your problem is the body, right?


"Be seeing you."
50D - 17-55 f/2.8 IS - 18-55 IS - 28-105 II USM - 60 f/2.8 macro - 70-200 f/4 L - Sigma flash

  
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Two lenses w/ high Microadjust #s
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