Effective f = (M + 1) x f
Where M = Image size / Subject Size, { 1 / 2 in your case), and f is f stop
from lens.
So if lens is at f16 at full extension then effective f stop =
(.5 + 1) x 16 = f24. Use that for GN calculations.
Don't know if the T32 will tilt down enough to provide coverage.
olympus@xxxxxxxxxxxxxxx wrote:
>
> if i have a t32 sitting on top of a 1n and use the 50/3.5mac, will the
> flash cover subject? all the way till 1:2 or approx how far? is the
> aperture cals just like gn/distance or is there some other loss from lens
> extension?
>
> /Acer V
> --
> dum spiro, spero
> http://student.ucr.edu/~siddim01
>
>
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