I was about to suggest the same as Stig for LCD lighting. :-) There's really only one way to check for preflash. Do a couple of shots with the camera away from your face.
Another test you could do is to shoot a series of the same scene at different apertures. If the histogram creeps gradually down into shadow as you stop down, the flash delivers the same output regardless of camera setting and is broken. Btw, when my flash was faulty, it refused to do P-TTL at one particular zoom setting, but working almost as expected (slight underexposure) at other zoom settings. Took some testing to figure that one out... Don't give up until you've made heads and tails of what goes on, Igor! :-) Jostein 2009/12/7 Stig Vidar <[email protected]>: > Light in LCD: Its the same on my K-7. I think it is synchronized with the > light in the lcd on the camera. Try to turn of the light in the custom menu. > > Exposure: Your *istDS have a base iso of 200 and your K-7 a base iso of 100. > When testing, do you have both cameras on the same iso value? Diffusors and > bouncing are stealing a lot of light. Are you sure your flash is powerful > enough. Try increasing ISO. I am almost always using ISO 200 to ISO 400 when > using a flash. > > My own impression is very good results with this flash on K-7. > > Stig Vidar Hovland > > ________________________________________ > Fra: [email protected] [[email protected]] på vegne av Igor > Roshchin [[email protected]] > Sendt: 7. desember 2009 05:44 > Til: [email protected] > Emne: AF 540 FGZ - I am totally confused -- need help from K7+AF540FGZ owners > > I am totally confused... > I am still trying to figure out how AF 540 FGZ is supposed to work > with K-7. > > I see several strange things: > 1. When the flash is mounted on K-7, whenever the camera is in the > metering state, the green back light on the flash stays on, > and I cannot turn it off by pressing the "light" button. > > I just found that the only way to turn off that light on the flash while > K-7 is in the metering state is to have K-7 in M,B, or X mode, > switch the flash into A-mode, and push the button "light" to switch > of the light. > > This is not how the flash behaves on *ist DS. > > Could somebody please confirm whether K-7 + AF540FGZ indeed behave > this way? > > 2. AF540FGZ in P-TTL modem, when the flash is directed at > the object, produces shots that are between -0.5 to -1 stop > underexposed, if at a distance of more than 3m (10ft) > Using a reflector (I've been using the > Lightsphere Cloud ),- doesn't seem to provide adequate metering: > all shots are 1-2 steps underexposed. > Using the bounce card on the flash also leads to great underexposure, - > even within a rather small room (I tested in the bedroom). > > Using the same flash with *istDS produces very consistent results > with and without Lightsphere Cloud. > > Can anybody confirm that the combination of the AF540FGZ and > some type of reflector on K-7 produces different > metering? > Thank you in advance! > > I suspect if something is wrong with the K-7 (or the flash?), > and I need to exchange them for a proper unit, while I can. > > With all of that I seem to be able to confirm that there is preflash. > My eye cannot notice it, but I confirmed that I can see a flash > through the viewfinder, which, if I am correct, indicates the preflash > happens (i.e. it happens before the mirror is down). > When I am shooting in the A mode of the flash, I don't seem to > see the flash through the viewfinder. > > > Igor > > PS. On top of all that, the flash head has a problem that it does > not go into the full straight position. Weird... > I'll need to exchange it, - but I am still trying to figure out > if I should do the same with the body. > > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- http://www.alunfoto.no/galleri/ http://alunfoto.blogspot.com -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
