Id like to start a little poll to see what resolutions are possible for you in LF. It would be interesting to compare what is your peak result under "laboratory conditions" using a test chart and how much of that you can realize in the field. Im aware that almost nobody will shoot test targets in the field, but perhaps you can interpolate from small details how much resultion you usually achieve outdoors or at least if your outdoor shots are nearly as sharp as the test shots or significantly less.

It would be nice of you to use that proposed chart. If that is too much for you, but you would like to attend in the poll anyway, just fill out the fields that you like to.

test shots

peak resolution (lpm):

negative format:

lens used:

aperture used:

exposure time used:

film:

developer:

used light (flash or lamps):


in the field

usually achieved percentage of your peak resolution (only a rough estimation):

usually used lens(es):

usually used apertures:

usually used exposure times:

your standard film:

your standard developer:


prefered light conditions (direct sunlight or shadowed sunlight or dull weather):


Maybe we all could learn something from the contributions. Thanks in advance to all that join in.

Best regards,
Andreas Rudolph




My results:


test shots

peak resolution (lpm): 40 lpm

negative format: 5 x 7 inch

lens used: Symmar-S 5.6 / 210 mm

aperture used: f/22

exposure time used: 20 s up to 2 minutes

film: ADOX / ROLLEI Ortho 25 (effective speed 6 to 12 ASA)

developer: Rodinal 1+200

used light (flash or lamps or daylight): daylight



in the field

usually achieved percentage of your peak resolution (only a rough estimation): 50 % to 80 %

usually used lens(es): Symmar-S 210 mm

usually used apertur(es): f/22

usually used exposure times: 10 to 3 minutes

your standard film: ORTHO films (ADOX / ROLLEI ORTHO 25, ORWO FO1 and FO5)

your standard developer: Rodinal 1+200 (in the tray, intermitted agitation)

prefered light conditions (direct sunlight or shadowed sunlight or dull weather): dull weather or shadowed sunlight