Hei!
Ma olen teadlik ISO, ava, säri omavahelistest seostest.
Lihtsalt üle ISO200 selle aparaadiga eriti ei lähe, või olen mina liiga pirtsakas.
Lugesin CHDK manuali ja proovisin mõista, kas saan ehk ava f2.8 peale seada.
Leidsin järgmist:
Override Aperture [Off , 2.77 – 16.00]
For cameras with an actual aperture / iris. mechanism (IXUS / SD models have ND filter). AV in the OVERRIDES on the OSD. This feature allows you to override the camera’s aperture settings. Simply select the desired aperture setting and the camera will use that setting in all auto and manual modes. Please note that the actual aperture values available depend on the camera zoom settings/position.
Ühesõnaga IXUS seerial on avade asemel ND filter mis keeratakse sensori ette:
ND filter state (For cameras with a ND Filter)
When your camera detects a really bright scene, it will swing the ND filter inline with the lens and sensor. This makes the scene look darker and will affect the exposure (but not depth of field like a real aperture / iris would). With the ND filter in, the camera can select a slower shutter speed without over-exposing the entire scene. Also, with the ND filter swung in, the camera will capture an image with an aperture of f/8 - This is an artificial aperture value caused by the ND filter swung in. With CHDK, you can choose to keep the ND filter out, and just select a faster shutter speed to compensate.
Mina saan aru, et rippsilla pildistamisel arvas kaamera heaks ND filter ette keerata koos avaga f8.0 ja kogu lugu.
ND filtri valikud on [Off / In / Out]
Lahendus on vägisi "
Out means the ND filter is kept out."
Ja sellega sunnin kaamerat kiiremat säriaega kasutama
Pean veel seda teooriat katsetama...
Parimat soovides,
-Ilmar-