After reading Bruce Fraser's entire book on sharpening I reduced the
content to a couple simple ground rules.
1) First resize the image to the desired print size at given resolution
2) View the resized image on screen at 25-30% ** of its full size
3) While viewing the image at this size sharpen until the image looks
just slightly crunchy (ie, just slightly oversharpened)
Viewing at 25-40% compensates for the difference in screen and print
resolution. Making the image just slightly crunchy compensates for the
slight softening effect of the print process.
** The actual rule for viewing percentage on screen is:
screen resolution/print resolution
If you have a 90 ppi screen and 300 dpi print you get
90/300 = 0.3 or 30%
Most monitors today are about 90ppi. I use 300 dpi for print
so do typically use 30% for viewing
Works for me
Chuck Norcutt
Jim Nichols wrote:
> Hi Carlos,
>
> Thanks for your comments. I have, in the past, had a tendency to
> oversharpen. Since I became aware of that, I have tried to limit sharpening
> to what I perceived to be absolutely necessary.
>
> Jim Nichols
> Tullahoma, TN USA
> ----- Original Message -----
> From: "Carlos J. Santisteban" <zuiko21@xxxxxxxxx>
> To: <olympus@xxxxxxxxxxxxxxxxx>
> Sent: Tuesday, December 15, 2009 6:02 AM
> Subject: Re: [OM] IMG: LE1CA Photo
>
>
>> Hi Jim and all,
>>
>> From: "Jim Nichols" <jhnichols@xxxxxxxxxxxxx>
>>> Focusing ease seems to be a function of focal length, with the 60mm
>> focusing with ease, and the 28mm more of a challenge, >particularly in low
>> light.
>>
>> As expected on a matte field without focusing aids. As you already know,
>> with rangefinders it's just the opposite: I find my Bessa-T unnecessarily
>> accurate while focusing the 21mm F4...
>>
>>> The linked image is one of my first with the 28.
>>>
>>> <http://gallery.leica-users.org/v/OldNick/Table+Top.jpg.html>
>> Despite not being state-of-the-art, the "old" E-1 may provide quite
>> acceptable high-ISO performance -- it does have a film-grain-like noise
>> that
>> seems more acceptable to me. Your sample proves that.
>>
>> By the way, I usually find your pictures somewhat oversharpened (to my
>> taste). Maybe you're compensating some "fuzzyness" in your system, or is
>> it
>> some issue with the web gallery?
>>
>> However, this last one was (like most of your pics) a very pleasant image.
>> Thanks for sharing.
>>
>> Cheers,
>> --
>> Carlos J. Santisteban Salinas
>> IES Turaniana (Roquetas de Mar, Almeria)
>> <http://cjss.sytes.net/>
>> --
>> _________________________________________________________________
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>> Themed Olympus Photo Exhibition: http://www.tope.nl/
>>
>>
>
>
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