I never heard of this, but I'm sure somebody here will chime in. I'm now a little curious myself.It's mentioned in the D-Flash manual as a way to check exposure without wasting film. There are no pictures nor discussion of it that Google or Kagi can find, which is wild, and I can't imagine how it would work.
Does anyone know anything about this thing, or even better, have pictures?
Wild. So it’s just a test target for the OTF sensor. I was imagining you somehow looked through it.
I never use
I don't understand what do you do with it.
In the studio work with multiple lights, you can take a few test shots without film to determine the range and power that the TTL flash would use before the session so you don't run out of range. Normally you would use manual flash power with a flash meter.
In daylight fill flash use, you can take a few tests shots with different aperture settings to see what power was needed on the flash when using TTL mixing with ambient.
You could also test with a Polaroid.
I always wondered if this would match up to actual film. This would sure help if you were doing some sort of macro work. Probably would need fancier flash. The flash is almost certainly Sunpak, it's a nice flash, I never use (but I'm ready!)
I am still puzzled. What is it that tells you what the range and power is required i.e what actually indicates what the film will record. I take it that what looks like a small grey card inside the back is just that - a small grey card - so it is not that which tells you anything
All the e-bay advert talks about is that it checks for vignetting and for that you use holes in the corners so that bit knd of makes sense but not the rest
Thanks
pentaxuser
Color neg emulsion brightness can differ from color transparency emulsion. And dependent upon brand of film, too.
It would be simple to use a 135 canister with emulsion leader sticking out, and compare its brightness vs. what looks to be 18% midtone (seen in post #7) of the Hassy or knockoff unit.
I am still puzzled. What is it that tells you what the range and power is required i.e what actually indicates what the film will record. I take it that what looks like a small grey card inside the back is just that - a small grey card - so it is not that which tells you anything
All the e-bay advert talks about is that it checks for vignetting and for that you use holes in the corners so that bit knd of makes sense but not the rest
Thanks
pentaxuser
It doesn't actually tell you anything.
It simply permits the TTL flash metering system to work the same way as it would with film.
And that metering system, and the feedback systems built into, are what tell you things - primarily about whether the flash(es) employed have sufficient power to be able to illuminate the subject sufficiently.
Essentially, it allows the TTL flash metering system to give you a go/no go result, without having to waste any film.
In the studio work with multiple lights, you can take a few test shots without film to determine the range and power that the TTL flash would use before the session so you don't run out of range. Normally you would use manual flash power with a flash meter.
In daylight fill flash use, you can take a few tests shots with different aperture settings to see what power was needed on the flash when using TTL mixing with ambient.
You could also test with a Polaroid.
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