 |
|
 |
Mostra argomento precedente :: Mostra argomento successivo |
Autore |
Messaggio |
ranton utente attivo
Iscritto: 27 Set 2005 Messaggi: 5484
|
|
Vai ad inizio pagina Vai a fine pagina |
|
 |
ranton utente attivo
Iscritto: 27 Set 2005 Messaggi: 5484
|
Inviato: Sab 28 Lug, 2012 11:14 am Oggetto: |
|
|
Imaging-resource ha pubblicato un test con risultati non proprio scontati, almeno per me:
Autofocus Reality Part 1: Center-Point, Single-Shot Accuracy.
Citazione: | Conclusions.
This really wasn’t a “conclusion” post; our intention was to just demonstrate some autofocus basics that most people know already.
- Live View (contrast-detection) AF on a still target is more accurate than phase-detection AF. It should be so. Contrast detection is using the actual sensor to determine focus; phase detection is not. Overall we found about one shot in ten was out of focus with phase detection.
- Live View AF is as accurate as Roger View MF. You may be better than this, or you may not.
- Phase-detection AF has more shot-to-shot variation than contrast detection. It’s not huge, but it’s real. This shouldn’t surprise anyone. Phase detection was developed for fast AF speed and to detect subject movement. It wasn’t developed to be more accurate.
- Microfocus adjustment pulls good phase-detection AF results up to a par with Live View, but it doesn’t eliminate the small amount of shot-to-shot variation that phase-detection AF has. |
_________________ https://www.flickr.com/photos/ranton/ |
|
Vai ad inizio pagina Vai a fine pagina |
|
 |
|
|
Non puoi iniziare nuovi argomenti Non puoi rispondere ai messaggi Non puoi modificare i tuoi messaggi Non puoi cancellare i tuoi messaggi Non puoi votare nei sondaggi Non puoi allegare files in questo forum Puoi scaricare gli allegati in questo forum
|
|