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Author Topic: Lens corrections and editing performance  (Read 619 times)
bjanes
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« on: September 14, 2013, 07:27:20 AM »
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I often enable lens corrections on as default in my Lightroom workflow. Yesterday I was processing a 36 MB image and using the healing brush to remove some dust spots in the image. The brush was unusable: it responded very slowly to cursor movements and was erratic, jumping all over the place. A brief Google search revealed that having performed  lens corrections prior to use of the brush can cause such behavior. I turned lens corrections off and the brush performed normally.

I am posting this as a heads up for other users. Have others encountered this problem and what other editing features are affected by prior use of lens corrections. The lens in this case was the Zeiss 130 mm f/2 apo Sonnar on the Nikon D800e. This lens is highly corrected and needs hardly any lens corrections to be performed and I will likely not use corrections with this lens, and I will be checking to see if this problem occurs with other lenses.

Best regards,

Bill
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Malco
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« Reply #1 on: September 14, 2013, 08:05:54 AM »
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It happens with any lens and is a known problem as far as I am aware.
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stamper
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« Reply #2 on: September 14, 2013, 08:13:51 AM »
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A lot depends on your computer specs.Windows 7 32 gig ram.!7-3370 cpu@ 3.4 GHz. Lens profile enabled and processing files from a d600 approx 24mbs no problem. 36 mbs is more than most photographers process?
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bjanes
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« Reply #3 on: September 14, 2013, 08:36:32 AM »
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A lot depends on your computer specs.Windows 7 32 gig ram.!7-3370 cpu@ 3.4 GHz. Lens profile enabled and processing files from a d600 approx 24mbs no problem. 36 mbs is more than most photographers process?

My computer is midlevel in performance as shown below from the Lightroom system info listing:

Lightroom version: 5.0 [907681]
Operating system:  (Build 9200)
Version: 6.2 [9200]
Application architecture: x64
System architecture: x64
Logical processor count: 8
Processor speed: 2.6 GHz
Built-in memory: 24567.1 MB
Real memory available to Lightroom: 24567.1 MB
Real memory used by Lightroom: 316.3 MB (1.2%)
Virtual memory used by Lightroom: 285.0 MB
Memory cache size: 36.6 MB
Maximum thread count used by Camera Raw: 4
System DPI setting: 96 DPI
Desktop composition enabled: Yes
Displays: 1) 1920x1200

Performance in Photoshop is good, but in general Lightroom is a bit sluggish, especially on startup.

Bill

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Vladimirovich
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« Reply #4 on: September 14, 2013, 08:50:58 AM »
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A lot depends on your computer specs.Windows 7 32 gig ram.!7-3370 cpu@ 3.4 GHz. Lens profile enabled and processing files from a d600 approx 24mbs no problem. 36 mbs is more than most photographers process?
"32 gig ram.!7-3370 cpu@ 3.4 GHz." is more than most photographers use.
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Vladimirovich
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« Reply #5 on: September 14, 2013, 08:52:35 AM »
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I often enable lens corrections
now image that users of certain systems have no luxury to switch optics correction off (thank you, Adobe).
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