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Occasional Contributor
Posts: 9
Registered: ‎07-02-2020

Re: 70-200 f2.8L photos too soft

Just saw your previous post. I did upload the raw files but I think google photos converted them to jpg. How do I upload raw files on this forum? I tried that but the site complained that they are too big.
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Posts: 13,025
Registered: ‎12-07-2012

Re: 70-200 f2.8L photos too soft

Yes they would be so that is out.  You need something like Dropbox.

 

However form the sample, I did get to see in PS, your lens looks just fine. Don't go beyond 100% in viewing.  That is a critical viewing level for sure. If you shoot Raw format none of your camera settings are applied to the Raw file.  Always do a lens correction and a small amount of sharpening.  Less is more. I always do a levels adjustment in PS, too.  But that is mostly it.

 

There are similar adjustments in DPP4.

EOS 1DX and 1D Mk IV and several lenses!
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Occasional Contributor
Posts: 9
Registered: ‎07-02-2020

Re: 70-200 f2.8L photos too soft

I do shoot only raw. It’s possible google photos stripped out all the meta data.

Thanks for assuring me that the lens is ok 😃. This thing has been stressing me out.
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Posts: 10,382
Registered: ‎08-13-2015

Re: 70-200 f2.8L photos too soft

[ Edited ]

@Ray-uk wrote:

Trying to assess sharpness by viewing at 200% is a complete waste of time because the software is just spreading the pixel information over a larger area than the natural resolution, there is no point in going above 100%.


That is both true and not true at the same time.  I lot depends upon the size of your screen, so let's assume a 15" laptop. 

 

"Trying to assess sharpness by viewing at 200%, on a 15-inch 2K display, is a complete waste of time". Now, this is TRUE!  A 2K display is your typical 1920 x 1080 Full HD display resolution.

 

I use a laptop with a 15" 4K display.  The display has a resolution of 3840 x 2160.  When I open a photo in most appplications, the image is typically displayed "fit" to the size of the window displaying it.  

 

Zooming to "100%" means use one display pixel per image pixel. In other words, display the image at a 1:1 ratio between display pixels and image pixels.  When I change the image from "fit" to "100%", the display does not change very much.  I am sill looking at most of an 20MP image.

 

If I want to actually "zoom in" on an image for a magnified view, then I need to select 200% or more to see a "magnified" view.

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"Doctor told me to get out and walk, so I bought a Canon."
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Posts: 13,025
Registered: ‎12-07-2012

Re: 70-200 f2.8L photos too soft

"That is both true and not true at the same time." 

 

Of course a better monitor is better. But at 100% you are still at pixel level at least in PS. I don't know what editor or viewer you use.

I have a 32" monitor and PS opens up a full Raw file at 25% from the 1DX.

If you increase to more than one 100% you are asking the computer guess. A Raw file can only reproduce an image at the resolution it was taken at. If you blow it up the image further than 100%, it will try to do it. However, what you see will be a best guess. Your computer will try to show the current pixels replicated outwards. Each pixel will be surrounded by replicas of itself. This will make your picture look blurry.  100% is 100%.

 

To the OP don't do that!

EOS 1DX and 1D Mk IV and several lenses!
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Posts: 10,382
Registered: ‎08-13-2015

Re: 70-200 f2.8L photos too soft


@ebiggs1 wrote:

"That is both true and not true at the same time." 

 

Of course a better monitor is better. But at 100% you are still at pixel level at least in PS. I don't know what editor or viewer you use.

I have a 32" monitor and PS opens up a full Raw file at 25% from the 1DX.

If you increase to more than one 100% you are asking the computer guess. A Raw file can only reproduce an image at the resolution it was taken at. If you blow it up the image further than 100%, it will try to do it. However, what you see will be a best guess. Your computer will try to show the current pixels replicated outwards. Each pixel will be surrounded by replicas of itself. This will make your picture look blurry.  100% is 100%.

 

To the OP don't do that!


You're talking about pixel binning.  When I zoom to 200%, the number of pixels needed to display the image is doubled in along horizontal and vertical axis.  This means four display pixels, 2 x 2, are used to display one image pixel.  No image processing required.

 

I have a couple of 27" 1920 x 1080 monitors, too.  Images do look bad when I zoom past 100%. 

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"Doctor told me to get out and walk, so I bought a Canon."
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Posts: 13,025
Registered: ‎12-07-2012

Re: 70-200 f2.8L photos too soft

OK then you are not actually viewing at 100% pixel level.  That was my point.

EOS 1DX and 1D Mk IV and several lenses!
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