Archived posting to the Leica Users Group, 2014/04/12
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]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 >