[meteorite-list] Mystery

From: printshop_at_terra.com.pe <printshop_at_meteoritecentral.com>
Date: Thu Apr 22 10:06:13 2004
Message-ID: <B9E74A62.35DA%printshop_at_terra.com.pe>

Screen resolution for a Macintosh computer is 72 dpi, and for a PC is 75
dpi. You don't need to set the resolution of your image to anything higher
than that. It will not look any better, and if on a web page it will just
take longer to download.

To print an image, set the resolution to double the screen lines (linature)
at which you are going to print (usually 300 dpi is more than enough for
high resolution printing of continuos tone images = photographs) anything
more than that is just a waste.

An image at a resolution of 72 dpi will never print right, that's why web
image are useless for printing. If you want to have the best of both worlds,
display the 72 dpi picture on your web page and link it to a higher
resolution image (the 300 dpi one) that will only load if you click on it.

Meteorites is just a passtime as I walk the arid dessert on the south coast
of Peru hunting for fossils and shark teeths (mainly Megalodon's and Great
White's), my real job is as a graphic designer for commercial printing and
web design.

My 2 cents.

Javier Castagnetto
Lima, Peru

> De: Michael L Blood <mlblood_at_cox.net>
> Fecha: Thu, 31 Oct 2002 11:32:46 -0800
> Para: <SSachs9056_at_aol.com>, <meteorite-list@meteoritecentral.com>
> Asunto: Re: [meteorite-list] Mystery
>
> Hi Steve,
> I have it on good authority a monitor cannot display finer than 72
> dpi. However, you can SET the dpi to anything - and apparently, 300 dpi
> is a good print level IF you are printing - but totally unnecessary for
> web viewing and increasing the dpi WOULD increase download time.
> In my instance, it was gif vs. jpg only. JPG is much faster.
> Someone may know how high is best for printing, but I always assumed
> it was the highest dpi obtainable.
> Best wishes, Michael
>
> on 10/30/02 6:06 PM, SSachs9056_at_aol.com at SSachs9056@aol.com wrote:
>
>> Hi Michael and List,
>>
>> I'm not sure if this will help you or not. The photograph portion of the
>> software I use (PhotoStudio 2000) for my meteorite website gave me the option
>> of scanning photographs anywhere from a 75dpi resolution to 2400dpi
>> resolution. I initially scanned the photos at about 600dpi. Little did I
>> realize until I tried opening the website that it took many minutes for all
>> of the pics to display. Needless to say at 600dpi, the images took up a
>> tremendous amount of real estate. I re-scanned all of the pics again at
>> 75dpi, and there was really no discernible difference in picture quality. The
>> pics loaded up at least 6-7 times as fast, the website was much quicker to
>> display...all was right with the world.
>>
>> Now, I don't a thing about digital cameras but I would surmise that if the
>> cameras allowed the operator to determine the dpi / resolution, a lower
>> resolution might work as long as it does not affect the image quality. Anyone
>> else with a thought on this?
>> My two dpi worth... ;-)
>>
>> Steven L. Sachs
>
> Whenever I feel blue, I start breathing again.
> --
> Worth Seeing:
> - Earth at night from satelite:
> http://antwrp.gsfc.nasa.gov/apod/image/0011/earthlights_dmsp_big.jpg
> - Earth - variety of choices:
> http://www.fourmilab.ch/earthview/vplanet.html
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>
>
>
>
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Received on Thu 31 Oct 2002 09:00:18 PM PST