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Frequent Contributor
Posts: 28
Registered: ‎07-23-2013

How to calibrate the Canon Canon EF 180mm f3.5L Macro USM AutoFocus Telephoto

I am curious how to calibrate the Canon Canon EF180mm f3.5L Macro USM AutoFocus Telephoto using the Datacolor Spyder Lenscal?  The instructions say to multiply the mm by 25 to get the length to set the Lenscal away from the lens in order to perform the calibration.  However, for this lens that would be a huge distance away and not the distance I shoot at with this lens.  Any help here is much appreciated.

 

thanks!

Canon EOS 5D Mark III SLR
Canon EOS 7D Digital SLR
Canon EOS 50D Digital SLR
Canon EF 24-105mm f/4 L IS USM
Canon EF 16-35mm f/2.8L II USM
Canon MP-E 65mm f/2.8 1-5x Macro Photo Macro
Canon EF 180mm f3.5L Macro USM AutoFocus Telephoto
Canon EF 70-200mm f/2.8L IS II USM
Canon EF 70-200mm F/4L USM
Canon EF 50mm f1.4 USM
Canon EF 85mm f/1.8 USM
Canon EF 100-400mm f/4.5-5.6L IS USM Telephoto Zoom
Canon Extender 1.4 III
Quantaray 18-200mm 1:3.5-6.3
Sigma 105mm 1:2.8 DG Macro
Sony Rx100
Sigma 150-600mm F5-6.3 DG OS HSM | C
Esteemed Contributor
Posts: 2,502
Registered: ‎02-17-2016

Re: How to calibrate the Canon Canon EF 180mm f3.5L Macro USM AutoFocus Telephoto

I can only tell you what Bob Atkins says:

"The lens testing chart I'm going to use can be printed on 4x6 card. Now a 4x6 target isn't very big, so the idea is to print a number of them and place them in the center and at the corners of a larger chart. For APS-C sensor cameras I usually place them on a 15"x22" background and if that fills the frame, the magnification of the system will be around 1:25 which for a number of reasons is a good number to show the typical performance of a lens. If you were doing lens testing using a full frame DSLR, you'd put the targets at the center and corners of a 24" x 36" rectangle to get the same magnification ratio."

 

I don't know *why* a factor of 25 is desireable, but it seems to be. It is probably a good compromise between near field and infinity field.

VIP
Posts: 9,578
Registered: ‎12-07-2012

Re: How to calibrate the Canon Canon EF 180mm f3.5L Macro USM AutoFocus Telephoto

"The instructions say to multiply the mm by 25 to get the length to set the Lenscal away from the lens in order to perform the calibration."

 

That is roughly 15 feet.  That is a problem?

EOS 1DX and 1D Mk IV, along with, a lot of other stuff.
Honored Contributor
Posts: 6,546
Registered: ‎08-13-2015

Re: How to calibrate the Canon Canon EF 180mm f3.5L Macro USM AutoFocus Telephoto


@tdehan wrote:

I am curious how to calibrate the Canon Canon EF180mm f3.5L Macro USM AutoFocus Telephoto using the Datacolor Spyder Lenscal?  The instructions say to multiply the mm by 25 to get the length to set the Lenscal away from the lens in order to perform the calibration.  However, for this lens that would be a huge distance away and not the distance I shoot at with this lens.  Any help here is much appreciated.

 

thanks!


The Dot Tune method recommends 50x the focal length.  

If you want to calibrate at your typical shooting distance, then by all means do it.  It is always best to set an AFMA under actual shooting conditions, including lighting conditions.

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"I don't rent software. I use Photoshop CS6, ACR 9.8 and Lightroom 6.8 ."
Frequent Contributor
Posts: 28
Registered: ‎07-23-2013

Re: How to calibrate the Canon Canon EF 180mm f3.5L Macro USM AutoFocus Telephoto

I never said 15 feet is a problem. The lens is a macro lens and I am typically no further away form my subject than 4.5 feet...sometimes closer.
Canon EOS 5D Mark III SLR
Canon EOS 7D Digital SLR
Canon EOS 50D Digital SLR
Canon EF 24-105mm f/4 L IS USM
Canon EF 16-35mm f/2.8L II USM
Canon MP-E 65mm f/2.8 1-5x Macro Photo Macro
Canon EF 180mm f3.5L Macro USM AutoFocus Telephoto
Canon EF 70-200mm f/2.8L IS II USM
Canon EF 70-200mm F/4L USM
Canon EF 50mm f1.4 USM
Canon EF 85mm f/1.8 USM
Canon EF 100-400mm f/4.5-5.6L IS USM Telephoto Zoom
Canon Extender 1.4 III
Quantaray 18-200mm 1:3.5-6.3
Sigma 105mm 1:2.8 DG Macro
Sony Rx100
Sigma 150-600mm F5-6.3 DG OS HSM | C
Honored Contributor
Posts: 6,546
Registered: ‎08-13-2015

Re: How to calibrate the Canon Canon EF 180mm f3.5L Macro USM AutoFocus Telephoto


@tdehan wrote:
I never said 15 feet is a problem. The lens is a macro lens and I am typically no further away form my subject than 4.5 feet...sometimes closer.

Typically when I use that lens, my rig is mounted on a tripod, and I am focusing manually, using Live View at 10x zoom.  I rarely shoot macro photos handheld using auto focus.  When I do, it is typically bees polllnating flowers.

 

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"I don't rent software. I use Photoshop CS6, ACR 9.8 and Lightroom 6.8 ."
Frequent Contributor
Posts: 28
Registered: ‎07-23-2013

Re: How to calibrate the Canon Canon EF 180mm f3.5L Macro USM AutoFocus Telephoto

I never stated I am using the lens hand held....
Canon EOS 5D Mark III SLR
Canon EOS 7D Digital SLR
Canon EOS 50D Digital SLR
Canon EF 24-105mm f/4 L IS USM
Canon EF 16-35mm f/2.8L II USM
Canon MP-E 65mm f/2.8 1-5x Macro Photo Macro
Canon EF 180mm f3.5L Macro USM AutoFocus Telephoto
Canon EF 70-200mm f/2.8L IS II USM
Canon EF 70-200mm F/4L USM
Canon EF 50mm f1.4 USM
Canon EF 85mm f/1.8 USM
Canon EF 100-400mm f/4.5-5.6L IS USM Telephoto Zoom
Canon Extender 1.4 III
Quantaray 18-200mm 1:3.5-6.3
Sigma 105mm 1:2.8 DG Macro
Sony Rx100
Sigma 150-600mm F5-6.3 DG OS HSM | C
Highlighted
Esteemed Contributor
Posts: 4,917
Registered: ‎11-13-2012

Re: How to calibrate the Canon Canon EF 180mm f3.5L Macro USM AutoFocus Telephoto

See Item 2 fom Canon AFMA guide. If most of your use is at macro distances calibrate at that distance.

 

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John Hoffman
Conway, NH

1D X, Rebel T5i, Many lenses, Pixma PRO-100, MX472, LRCC
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