Archived posting to the Leica Users Group, 2014/04/12

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Subject: [Leica] Comparing film and digital resolution
From: hopsternew at gmail.com (Geoff Hopkinson)
Date: Sun, 13 Apr 2014 01:23:40 +1000
References: <37877B71-8223-4F5E-975D-816FAFBF28CA@bex.net> <CAE3QcF5mrnx5Cau6huCntxKk+-ZzOxFY9QXgPU=mOvFQRe+egw@mail.gmail.com> <5349265C.5030503@hemenway.com>

Jim, quite the most inspiring and relevant comment I can ever recall. Well
done.


Cheers
Geoff
http://www.pbase.com/hoppyman


On 12 April 2014 21:41, Jim Hemenway <jim at hemenway.com> wrote:

>
> 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
>>>
>>> _______________________________________________
>>> Leica Users Group.
>>> See http://leica-users.org/mailman/listinfo/lug for more information
>>>
>>>  _______________________________________________
>> Leica Users Group.
>> See http://leica-users.org/mailman/listinfo/lug for more information
>>
>>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information
>


In reply to: Message from hlritter at bex.net (Howard Ritter) ([Leica] Comparing film and digital resolution)
Message from hopsternew at gmail.com (Geoff Hopkinson) ([Leica] Comparing film and digital resolution)
Message from jim at hemenway.com (Jim Hemenway) ([Leica] Comparing film and digital resolution)