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Re: [OM] how many megapixels here?

Subject: Re: [OM] how many megapixels here?
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Tue, 01 Dec 2009 09:45:21 -0500
I forgot to say that I'd be interested in the answer too if you ask him.

Chuck Norcutt


Chuck Norcutt wrote:
>  From the artist's page it appears to me that he's shooting with a 
> Mamiya 645 (just a guess based on what appears to be the sweeping curve 
> from pentaprism to eyepiece on that camera).  The camera takes various 
> digital backs which are available in 22, 28, 33 and 56 MP sizes with 
> prices ranging from $3700 to $30,500.  My guess is that he'd have to 
> sell an awful lot of prints to justify that 56 MP back.  So, I'm 
> guessing it's 33 MP or smaller.  These sensors are 4:3 ratio just like 
> 4/3 sensosr.
> 
> The 33 MP sensor is 6726 x 5040 pixels.  Over 40" 6726 gives you only 
> 168 pixels/inch.  Not much relative to a desired level of maybe 240 ppi 
> for a large print.  So I think you're looking at a ressed up image but 
> it looks good because it's very clean... no grain and no noise from 
> those still big pixels.  The 56 MP sensor is 9288 pixels on the long 
> side which would give 232 pixels per inch.  That's a lot closer to what 
> would be considered high quality for a large print.  But I think that 
> sensor is just too expensive and probably not used here.
> 
> Why not send him a note and ask?
> 
> Chuck Norcutt
> 
> 
> John Hudson wrote:
>> See this photo
>>
>> http://www.novascotiaphotos.com/frmpage/00269.html
>>
>> Taken across water the camera is ~ 1.5 to / 2 kilometers from the buildings 
>> in the distance.
>>
>> The camera is digital, likely a DSLR.I have no information concerning the 
>> focal length of the lens or the brand of the camera.
>>
>> I have seen a framed print of this image. The exposed part of the print 
>> measures 40" x 25". When viewed at 12" the level of detail in the entire 
>> photo is simply amazing.
>>
>> >From the photographer's web site, the gross measurements of the print 
>> >appear 
>> to be 48" x 22".
>>
>> Every single window frame, whether a whole window or part of a window, is 
>> clearly visible and discernable in the two storey sun lit building to the 
>> left of the light house. Each segment of the light dome of the lighthouse is 
>> clearly visible and discernable likewise.
>>
>> Can anyone with experience of making big digital prints give an opinion as 
>> to the possible megapixel size of the in-camera image from which this image 
>> could have been taken. Would the Olympus E3 be capable of producing this 
>> level of detail.
>>
>> Just curious.
>>
>> John Hudson
>>
>>
>>
>>
>>
>>
>>
>>
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>> The message was checked by ESET Smart Security.
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>>
>>
>>
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