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Canon 24 -70 F2.8 V2

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Old 02-07-2012, 06:03 PM
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skydog skydog is offline
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Canon 24 -70 F2.8 V2

How do you read these graphs? I see a difference..what does it mean? Is the difference that significant...more technical specs than reality?
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Old 02-07-2012, 09:56 PM
ItsOscar ItsOscar is offline
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Re: Canon 24 -70 F2.8 V2

More technical than anything you would be able to notice with the naked eye. I have the same lens.
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Old 02-08-2012, 12:44 AM
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Nasturtium Nasturtium is offline
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Re: Canon 24 -70 F2.8 V2

scroll down to how to read an MTF chart
http://www.luminous-landscape.com/tu...ding-mtf.shtml

basically it shows sharpness & contrast at different zooms/f-stops

HTH Nancy
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Old 02-08-2012, 05:24 AM
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Re: Canon 24 -70 F2.8 V2

Thanks Nancy
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Old 02-09-2012, 09:59 PM
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Re: Canon 24 -70 F2.8 V2

I also found this:

All you really need to know is this....

The left hand vertical line measures the amount of light getting through the lens. No lens can let 100 percent of the light through. But the closer to the top of the chart the lines are, the more light gets through. The more light, the better.
The horizontal line measures represents the center of the lens to the outside edge. So all the way to the left means dead in the middle of the lens, and all the way to the right is the outside edge.
The higher up the chart the thick lines are, the higher the contrast. Meaning more clarity.
The higher up the chart the thin line are, the sharper the lens will be.
The black lines show the lens wide open while the blue lines show the lens stopped down to f/8.
Anything above an 8, or the second horizontal line from the top, is considered excellent.

Using that information, we can see that this lens is super sharp at wide open at all focal lengths. That is hard for a variable zoom lens to do. This is going to be one amazingly sharp lens.
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