[Leica] Comparing film and digital resolution

[jim at hemenway.com (Jim Hemenway)]

Reminds me of:

"While you and i have lips and voices which
are for kissing and to sing with
who cares if some one eyed son of a bitch
invents an instrument to measure Spring with?"
      e e cummings

Jim, "go take some photos" Hemenway



On 4/12/14 12:52 AM, Geoff Hopkinson wrote:
> Howard yes no maybe depends and yes you have too much time on your hands 
> ;-)
>
> This might be of interest 100% (pixel for pixel on your screen) crop
> http://www.pbase.com/hoppyman/image/155191481
>
>
> Cheers
> Geoff
> http://www.pbase.com/hoppyman
>
>
> On 12 April 2014 14:14, Howard Ritter<hlritter at bex.net>  wrote:
>
>> As my work schedule slows down towards retirement, I seem to have way too
>> much time on my hands. So I decided to pursue a question I've been
>> wondering about for a long time. I got out some cameras and lenses and a
>> couple rolls of film and shot some photos of the house across the pond,
>> scanned the film, and cropped down to the small central portion of the
>> images to compare. I'd read that the best general-pupose emulsions resolve
>> as high as 150 line pairs/mm, which corresponds to 300 pixels/mm, or 7200 
>> x
>> 10800 pixels in a FF sensor. That's around 80 Mpx, which is also in the
>> same range for estimates of the information content that I've seen quoted
>> for 35mm film. This led me to expect that digital would fall short of 
>> film,
>> which puzzled me a bit as I have been not at all impressed by the 
>> technical
>> performance of the slides and negs I've been scanning.
>>
>> I picked Fujicolor 200 and Tri-X to compare with the D800, M typ 240, M8,
>> and NEX-7, 35mm lenses for the FF cameras, and 24mm for the M8 and NEX-7. 
>> I
>> also shot the same scene with both the M8 and NEX-7 at 35mm so I could
>> compare performance at the same image scale on the sensor.
>>
>> Suffice it to say that I was surprised by the results, linked below. Sure
>> wish I could try Panatomic-X!
>>
>>   http://gallery.leica-users.org/v/hlritter/Res+Test+Crops/
>>
>> I was also surprised to discover that even the highest pixel-count FF
>> sensor yet available does not match the capabilities of the lenses we use.
>> I've posted to that effect before, but here are the images to illustrate
>> the point.
>>
>> Comments and corrections of my misconceptions invited&  appreciated.
>>
>> --howard
>>
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>>
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