Thanks Jens, makes sense. Don
> -----Original Message----- > From: Jens Bladt [mailto:[EMAIL PROTECTED] > Sent: Sunday, February 12, 2006 9:06 AM > To: [email protected] > Subject: RE: Super A and fill-in flash? > > > I must admit that I most often use this technique when using a Metz flash. > Many Metz flashes have the ISO scale connected to the electronics. > > Anyway, it's the oldest trick inthe book: Working the flash at higher ISO > setting than the film, to reduce flash output. > When the AF280T is NOT in TTL-mode, it uses its own sensor. > If you set ISO to 400 when using a 100 ISO film, and use the recommended > aperture, the flash output will be 2 stops below, what the film requiers. > > This small test shows what I am talkning about (TTL,falsh at actual speed, > falsh at higher speed). > > I know it's not necesary to change the ISO setting on THIS > PARTICULAR flash > unit, but it's still recommendable - so you wont forget what you > are doing: > > http://www.flickr.com/photos/bladt/sets/72057594063145224/ > > > What you normally would do to obtain flash compensation is this: > 1. Set the camera according to the ambient light. Preferably in > manual mode. > (I normally use manual mode for all flash photography). > 2. Set the flash to a higher ISO. Two stops is fine (Double the ISO value > TWICE: i.e. 400 for a 100 film). > 3. Shoot at the aperture recommended by the Flash, shutter speed according > to the chosen aperture. > > This way the flash output will be two stops below a normal flash shot. > The image will be correctly exposed, but the shadows, created by > the ambient > light, may lighten up a little. > > Regards > > Jens Bladt > http://www.jensbladt.dk > > -----Oprindelig meddelelse----- > Fra: Don Sanderson [mailto:[EMAIL PROTECTED] > Sendt: 12. februar 2006 13:39 > Til: [email protected] > Emne: RE: Super A and fill-in flash? > > > Jens, how do you 'let the flash believe that the ISO setting is higher'? > I've always just stopped down a stop or two from what the flash recommends > and compensated with shutter speed. > I don't believe I've ever seen a flash whose sensor is linked to ISO in > auto mode. > > Don > > > -----Original Message----- > > From: Jens Bladt [mailto:[EMAIL PROTECTED] > > Sent: Sunday, February 12, 2006 3:41 AM > > To: [email protected] > > Subject: RE: Super A and fill-in flash? > > > > > > Yes, in a way. If the camera is set to underexpose by three > stops - that's > > what it will do. > > The flash will then try to give enough light for F.8. If you are > > out doors, > > only the closest part of the image will get light enough for > f8. The rest > > will be under exposed by three stops. In doors (short distances) you may > > very well be right. > > But three stops is too much to be named "fill flash". This is > more likely > > one or two stops. Fill in flash is for harsh light conditions > > where you want > > to open up the shadows on the subject. You do this by adding a > litle extra > > light from a flash - perhaps a stop or two less, than you would > use if the > > scenery was dark. > > > > For fill flash I don't use TTL. In stead I use the built-in > flash sensor - > > letting the flash believe that the ISO setting is higher - one or two > > stops - than it actually is. > > Regards > > Jens > > > > Jens Bladt > > http://www.jensbladt.dk > > > > -----Oprindelig meddelelse----- > > Fra: Vic Mortelmans [mailto:[EMAIL PROTECTED] > > Sendt: 12. februar 2006 11:12 > > Til: pentax epostlijst > > Emne: Super A and fill-in flash? > > > > > > Hallo, > > > > I own the Super A (with TTL-flash) and the AF280T. The manual of this > > camera says: "In metered manual mode, speeds slower than 1/125 sec. stay > > as are when the dedicated flash recycles. Choosing any slow speed, you > > can enjoy existing light photography with flash fill-in." > > > > So when I put the camera on 'M' and select an aperture like f/8 and a > > speed like 1/30 in some environmental light condition where this would > > cause an underexposure of 3 stops, I would expect the flash to just give > > the necessary light to make this a good exposure. > > > > Is this actually what the camera does? > > > > I notice that the flash fires when the shutter opens, so in any way, it > > won't take into account the 'available light' hitting the film during > > exposure. > > > > Groeten, > > > > Vic > > > > > > > > >
