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How to do grain and focal length

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  #1  
Old 11-30-2010, 09:33 AM
taysa taysa is offline
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How to do grain and focal length

Hello,

I love such grain and focal length in B/W pictures. I know this picture might been taken with mamya or similar camera and this is not edited with PS.

But i wonder if its possible to fake such effect really well with PS? I didn't manage to achieve it myself.
Would appreciate all ideas on how to do so. Thanks.

http://imghost.1x.com/38017.jpg
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  #2  
Old 11-30-2010, 09:58 AM
girlsfather girlsfather is offline
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Re: How to do grain and focal length

Quote:
Originally Posted by taysa View Post
Hello,

I love such grain and focal length in B/W pictures. I know this picture might been taken with mamya or similar camera and this is not edited with PS.

But i wonder if its possible to fake such effect really well with PS? I didn't manage to achieve it myself.
Would appreciate all ideas on how to do so. Thanks.

http://imghost.1x.com/38017.jpg
Grain can be simulated with either alien skin or nik software.

Creating a realistic narrow depth of field (of an all sharp photo) is far more complex.
A simple blurred layer with a soft mask would deliver ghosting in the areas where the mask is not solid white or black.
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  #3  
Old 11-30-2010, 10:40 AM
slash-5 slash-5 is offline
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Re: How to do grain and focal length

You can also use gradients on a blur layer to mimic shallow DOF.
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Old 11-30-2010, 10:56 AM
girlsfather girlsfather is offline
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Re: How to do grain and focal length

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Originally Posted by slash-5 View Post
You can also use gradients on a blur layer to mimic shallow DOF.
As I wrote above, this does not produce realistic results...
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Old 11-30-2010, 12:29 PM
slash-5 slash-5 is offline
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Re: How to do grain and focal length

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Originally Posted by girlsfather View Post
As I wrote above, this does not produce realistic results...
Great, provide a solution then.
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  #6  
Old 11-30-2010, 12:34 PM
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Der_W Der_W is offline
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Re: How to do grain and focal length

Use a specialized filter.
In Photoshop the closest would be the "Filter"-"Blur"-"Lens Blur" in which you define your alpha channel as a depth map.

(The alpha channel should have white at far areas, black at near areas, but it really doesn't matter because you can set the focus point anywhere you want.)
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Old 11-30-2010, 01:33 PM
girlsfather girlsfather is offline
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Re: How to do grain and focal length

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Originally Posted by Der_W View Post
Use a specialized filter.
In Photoshop the closest would be the "Filter"-"Blur"-"Lens Blur" in which you define your alpha channel as a depth map.

(The alpha channel should have white at far areas, black at near areas, but it really doesn't matter because you can set the focus point anywhere you want.)
Sadly the Lens Blur seems not to work with smart objects.
Having a complex picture, like a closeup portrait, it demands a good mask to get a believable result. So it seems you have to try and try again...

Also I found the result a bit harsh in the transition.
Using the mask, to hide part of the lensblurred copy helps a bit.
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Old 11-30-2010, 01:58 PM
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Der_W Der_W is offline
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Re: How to do grain and focal length

It works with smart filters, but you have to use "File"-"Scripts"-"Browse"-"PSDIRECTORY\Scripting\Sample Scripts\JavaScript\EnableAllPluginsForSmartFilters.jsx".
(Afterwards you should not mess with your selected channel if you want to keep it as a smart filter, otherwise you'll get into serious problems!)

The results are as harsh as the mask you create, so you might consider blurring the alpha channel in advance ;-).

But you're right, it's quite difficult to get good results with it (not even thinking of perfect ones), but it's definitively better than a Gaussian Blur covered by a mask :-)
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Old 11-30-2010, 02:26 PM
girlsfather girlsfather is offline
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Re: How to do grain and focal length

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Originally Posted by Der_W View Post
It works with smart filters, but you have to use "File"-"Scripts"-"Browse"-"PSDIRECTORY\Scripting\Sample Scripts\JavaScript\EnableAllPluginsForSmartFilters.jsx".
(Afterwards you should not mess with your selected channel if you want to keep it as a smart filter, otherwise you'll get into serious problems!)

The results are as harsh as the mask you create, so you might consider blurring the alpha channel in advance ;-).

But you're right, it's quite difficult to get good results with it (not even thinking of perfect ones), but it's definitively better than a Gaussian Blur covered by a mask :-)
Thanks for the infos about the script-thing!
But being unable to change the mask later, makes it quite useless in my eyes.

The mask was created using a soft brush, blurred 100px afterwards and used gradients\Auto to get 100% black and white.

To see the preview, the mask has to be hidden, but to get better results, I had to activate it on the lensblurred layer. So partially the blur got hidden again...
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  #10  
Old 11-30-2010, 04:50 PM
krypticide krypticide is offline
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Re: How to do grain and focal length

Seems to me the originally quoted picture may have been doctored. The coat seems to be blurred in areas that should be in focus.
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