Hi Daniel,
Your T 20 seems to work really fine. Don`t know anthing about the Miranda,
but some observations to Flash:
The OM-TTL-metering system is very accurate. When the image is only a
very small amount underexposed the Camera will say under, but you won`t
notice the difference in the image. Especially when a dark (read far away)
background is fooling the average metering system.
When shooting outdoors almost amy flashes don`t reach their nominal-output.
Because it is calculated with a certan amount of room reflections. Another
factor of uncernity is that most flashes give the flash ready LED when the
capacitor
isn`t really 1000aded. Some flashes are ready at 70% max. output while others
wait until
They reached 90%, this depends on the flash. I´m in the habit to wait for
another
few seconds when I´m shooting at the "edge of the flash" .
Frieder Faig
On Fri, Oct 05, 2001 at 10:02:43AM -0600, Daniel J. Mitchell wrote:
> It's green, in case that makes any difference -- anyway, I just acquired a
> T20 flash, so I was playing with it to get an idea of the range.
> Everything's fine there -- but the problem is that the other flash I have
> was obviously never quite doing what I want.
>
> Here's what I see:
>
> T20, f1.4, TTL control, pointing at wall about 2m away. Flash light comes
> on, I take the shot, the green LED flickers to tell me it exposed properly.
> Flash recharges fast, because it didn't need much light.
>
> T20, f1.4, TTL, pointing at wall about 5m away. Same as above, but flash
> takes longer to recharge.
>
> T20, f1.4, TTL, pointing at light; no flash, because it's bright enough
> already.
>
> T20, _f16_, TTL, pointing at wall 5m away -- "UNDER" lights in display,
> flash takes full time to recharge. Fair enough, lens is stopped down too
> much.
>
>
> All that makes sense and is what I'd expect. Here's the weird thing --
> using a 3rd party flash, it seems to all work, _except_ that the green
> 'flash okay' light doesn't light up. Flash is a Miranda "650 OM-dedicated":
>
> 650OM, f1.4, TTL control, wall about 2m away. Flash light comes on, shoot,
> LED just goes out. The weird thing is that the flash recharges fast, which
> suggests that the camera's telling it how long to fire for; it's not giving
> a full dump.
>
> 650OM, f1.4, TTL, wall about 5m away -- same as before, but flash takes
> longer to recharge.
>
> 650OM, f16, TTL, wall 5m away -- 'UNDER' comes on in display.
>
>
> The _really_ weird thing is that if I point at a wall that's just the right
> distance away, using the Miranda flash, the green LED _will_ flicker. It
> just only does it under certain precise conditions.
>
>
> Does anyone have any ideas what might be going on? It appears that both
> flashes work fine (shots taken with the Miranda come out okay, not over or
> under exposed), but for some reason, the green 'flash exposed properly'
> flicker doesn't happen, sometimes, with the Miranda flash. This isn't a big
> deal, I guess, but it's a bit disconcerting to have to guess if I got the
> shot okay, especially when it does sometimes tell me what's going on.
>
> thanks,
>
> -- dan
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