Pitanje ostaje
ALI JOJ - IZVINJAVAM SE - napravio sam opasan lapsus u pisanju poruke, sad to vidim - nije 2.5 sec već 1/2.5 !!!!!!!!!!!!!
Na to sam i mislio - oprostite ako ste se čudili tolikoj razlici a ja vas izazvao greškom u pisanju.
A ja se čudim što se vi toliko čudite
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Dakle 1/2.5 = 0.4 naspram 1/8 = 0.125 - na ovom rezultatu sam i bazirao pitanje
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I da vam kažem da sam do nekakvog odgovora došao googlovanjem:
http://www.olegnovikov.com/technical/primevszoom.shtml
Izdvajam:
"In many cases, if a ffl lens and a zoom lens have the same maximum aperture,
the ffl lens might actually be faster than the zoom lens. This happens due
to the fact that f-stops are actually about geometry, i.e. about the
geometric relationship between the focal length and the size of diaphragm
opening, while actual light transmission values are measured in t-stops
(which are not shown on most lenses) - and two lenses do not necessarily
transmit the same amount of light at the same f-stop! In other words, all
lenses have the same f-stops, but at the same aperture they might transmit
different amount of light due to the light transmission losses, which
results from lens internal light reflections and absorptions."
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Za ovakvim sam odgovorom tragao. Precino tehnički.
On uporedjuje dakle prajm sa zum objektivima ali verujem da je korisno zapaziti taj sasvim logičan parametar "t-stop"
Naime - sad predpostavljam da se razlikuju sočiva kod kompaktnog i dslr aparata možda i u tom "t-stop" parametru.
Da li ima te mogućnosti? Ostaje mi samo da se čudim istovetnosti Minolte i a610.