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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 12 Dec 2012 (Wednesday) 09:56
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So my 50L just arrived...

 
yoon395
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58 posts
Joined Apr 2007
Location: Silver Spring, MD
     
Dec 13, 2012 17:41 |  #16

Just went through some calibration on a used 50L I purchased (older date code if that matters) and after a couple different object tests it seemed I needed about -15/-16 adjustment to get it sharp @ f/1.2. I'm not concerned with that at all, as long as I'm getting a sharp image in the end.
I remember reading a blog article (on LensRentals I believe) that talked about how even top-grade cinema lenses needed calibration based on each individual body, so I don't think it's unreasonable to have to make micro-adjustments on these lenses.


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sol95
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661 posts
Joined Jul 2008
Location: Sydney, Australia
     
Dec 13, 2012 18:38 |  #17

chugger93 wrote in post #15357429 (external link)
Do most of you who own this lens, find yourself needing to MA it? I shot with it at 0, and it was off. F/1.4, 1 foot away or so, which I know is near MFD.

You do realise the 50L focus shifts by design? It's usually between f2.0-f4.0 at MFD, but could be an issue at f1.4


Bodies: 5D mk III
Lenses: 50 f/1.2L | 85 f/1.2L II | 100 f/2.8L IS Macro | 17-40 f/4.0L | 24-70 f/2.8L II | 70-200 f/2.8L IS II
Accessories: 430EX II | TC-80N3 M43: Olympus E-PM1 | Olympus m.Zuiko 14-42 II R | Panasonic 14 f/2.5 | Panasonic 20 f/1.8 | Olympus m.Zuiko 45 f/1.8

  
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linh811
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551 posts
Joined Dec 2009
Location: Spring, TX
     
Dec 14, 2012 01:06 |  #18

I had to MA mine, differently for the 2 different bodies I have.


7D || 5D2 || three 580exII's | 430exII | 24L II | 50L | 100L macro | 70-200/2.8L IS | 24-105L | canon 50/1.4 | canon 17-55/2.8 | Sigma 35/1.4 |Sigma 50/1.4 | Tamron 24-70/2.8 VC |Pocket Wizard Plus II. slingpro 100 and 200, and a million other accessories I can't even remember.

  
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SiaoP
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Location: Bay Area
     
Dec 20, 2012 17:32 |  #19

chugger can you explain your setup configuration for doing the MA? I think if you went through the trouble of getting another lens and the MA value is still similar, then you should just be content and keep it. As long as it's within bounds of the MA I wouldn't bother since the body has to be calibrated as well.


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newmandoyle
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Location: Bucks County, PA
     
Dec 21, 2012 16:45 |  #20

Judging by your results (not with just this lens), perhaps it is an issue with your Focal setup. I found that having good constant lighting and a solid tripod is key to getting good results. I calibrated my 50L with Focal at the recommended distance (2.5 meters) and it only required a +2 MFA adjustment. Overall, I felt I had a sharp copy without any calibration. The 50L is an awesome lens and I am sure you will love it once you get it calibrated.


5D3 |16-35L|24-70Lii|70-200Lii|Σ50A|100-400Lii
EOS M|m22|m15-85|

  
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AbPho
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Dec 21, 2012 17:09 as a reply to  @ post 15363584 |  #21

I manually micro adjust all my primes. If the camera has that feature you might as well use it and get the most out of your lens. Faster aperture primes need this more since the DOF is so shallow and critical focus is more important.

I use a 24x16" canvas print that I have of one of my shots. Camera on tripod controlled by PC running EOS utilities. Distance to target is 35x focal length.

As long as you can MA the lens then who cares if it is -20 or +20. Once you can't adjust any more then I would send the lens and camera in for calibration. You would be best off sending all your gear in at once. Otherwise any other lens might be screwed.


I'm in Canada. Isn't that weird!

  
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So my 50L just arrived...
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