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| sent on September 29, 2024 (12:32) | This comment has been automatically translated (show/hide original)
How wonderful! SPECTACULAR Che meraviglia! SPETTACOLARE |
| sent on September 29, 2024 (18:27) | This comment has been automatically translated (show/hide original)
Very beautiful. Good evening Molto bella. Buona serata |
| sent on September 29, 2024 (19:02) | This comment has been automatically translated (show/hide original)
hello Nino thanks! thanks to you too Daniele bye ciao Nino grazie! grazie anche a te Daniele ciao |
| sent on October 05, 2024 (21:00) | This comment has been automatically translated (show/hide original)
A classic, but really great shot, great colors and brightness Un classico, ma scatto davvero eccezionale, ottimi colori e luminosità |
| sent on October 06, 2024 (12:22) | This comment has been automatically translated (show/hide original)
Super Icelandic classic, always a beautiful sight; there was an aperture f/16 instead of f/22 to avoid diffraction, so even with a double time the water was fine... ;-)
Hello, Alberto Super classico islandese, sempre un bel vedere; ci stava un diaframma f/16 invece che f/22 per evitare la diffrazione, tanto anche con un tempo doppio l'acqua veniva bene…
Ciao, Alberto |
| sent on October 06, 2024 (12:29) | This comment has been automatically translated (show/hide original)
Very nice congratulations good Sunday Molto bella complimenti buona domenica |
| sent on October 06, 2024 (13:30) | This comment has been automatically translated (show/hide original)
Alessio and thealby thank you for your appreciation!
Alberto thanks for the suggestion, I will deepen this problem of diffraction that was unknown to me until now Alessio e thealby vi ringrazio per l'apprezzamento!
Alberto grazie per il suggerimento,approfondirò questo problema della diffrazione che mi era sconosciuto fino ad ora |
| sent on October 06, 2024 (14:01) | This comment has been automatically translated (show/hide original)
In practice, it is not that closing the diaphragm more and more consequently increases the depth of field and therefore the sharpness of the shot... There is a physical limitation due to the diffraction of light through the aperture blades of the optics, and it also depends on the density of the sensor. As a very general rule, it's a good idea not to go beyond f/11 for an APS-C sensor and f/16 for a full-frame sensor. However, I recommend that you mount the camera on a tripod and take the same shot with the same lens and the same parameters, changing only the aperture from time to time (and consequently compensating for the exposure time at the same ISO): by analyzing the comparison shots on the PC you will be able to determine which is the aperture beyond which the image is less sharp, a sign that the phenomenon of diffraction is intervening.
Hello, Alberto In pratica, non è che chiudendo il diaframma sempre di più aumenta di conseguenza la profondità di campo e quindi la nitidezza dello scatto… C'è un limite fisico dovuto alla diffrazione della luce attraverso le lamelle del diaframma dell'ottica e dipende anche dalla densità del sensore. Come regola molto generale, è buona cosa non spingersi oltre f/11 per un sensore APS-C e f/16 per un sensore full-frame. Io però ti consiglio di montare la macchina su cavalletto e di fare lo stesso scatto con la stessa ottica e gli stessi parametri cambiando di volta in volta solo il diaframma (e di conseguenza compensando il tempo di esposizione a parità di ISO): analizzando sul PC gli scatti a confronto sarai in grado di determinare qual è il diaframma oltre il quale l'immagine risulta meno nitida, segno che sta intervenendo il fenomeno della diffrazione.
Ciao, Alberto |
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