Moose may need 300 dpi at 3 feet but I think the rest of us could get by
with much less at that distance. According to the math here
<http://www.ndt-ed.org/EducationResources/CommunityCollege/PenetrantTest/Introduction/visualacuity.htm>
it's about 95 dpi at 3 feet. The same math says about 285 dpi at 1 foot.
Chuck Norcutt
On 10/25/2010 4:01 PM, John Hudson wrote:
> If viewed at 30 feet 260 ppi would be overkill. If viewed at 6 feet or less
> 260ppi might be enough but likely not. Viewing distance matters.
>
> If the 100cm x 80cm image was intended for up close viewing, say three feet,
> more like 300 ppi might be advisable.
>
> Saying that he generated a 100cm x 80cm image means not much unless there is
> some indication of the level of detail that is evident from whatever viewing
> distance is chosen.
>
> jh
>
>
>
> ----- Original Message -----
> From: "Ken Norton"<ken@xxxxxxxxxxx>
> To: "Olympus Camera Discussion"<olympus@xxxxxxxxxxxxxxxxx>
> Sent: Monday, October 25, 2010 3:33 PM
> Subject: Re: [OM] (OT) G12 vs OM Film
>
>
>> Which is a load of bogus crud. What happens when you scale the image
>> to the equivalent of, say, 260 ppi? Does the image turn to junk? Of
>> course not.
>>
>> AG
>>
>> On Monday, October 25, 2010, John Hudson<OM4T@xxxxxxxxxxx> wrote:
>>>
>>> ----- Original Message -----
>>> From: "Dawid Loubser"<dawidl@xxxxxxxxxxx>
>>> To: "Olympus Camera Discussion"<olympus@xxxxxxxxxxxxxxxxx>
>>> Sent: Monday, October 25, 2010 8:43 AM
>>> Subject: Re: [OM] (OT) G12 vs OM Film
>>>
>>>
>>>>
>>>> As a test, I have had made (some years ago) a ~ 100cm x 80cm high
>>>> quality print
>>>> of this image (not otherwise great, but technically at the limits of
>>>> what was achievable
>>>> in 2002 with a compact digital camera):
>>>>
>>>> http://fc06.deviantart.net/fs10/i/2006/115/3/b/Progressive_by_philosomatographer.jpg
>>>
>>> Interesting:
>>>
>>> What was the pixels per inch resolution of the file that was sent to the
>>> printer ?
>>>
>>> As I understand it 300 ppi is adequate for a high quality close up, say a
>>> viewing distance of 36" or less, but less than 300 ppi will suffice the
>>> further away one is from the print.
>>>
>>> jh
>>>
>>> --
>>> _________________________________________________________________
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>>>
>>
>> --
>> Ken Norton
>> ken@xxxxxxxxxxx
>> http://www.zone-10.com
>> --
>> _________________________________________________________________
>> Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
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>>
>
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