Checking histograms, like Mark suggested is a good idea, but quite a time comsuming procedure. Anyway, take a look at this: http://www.luminous-landscape.com/tutorials/understanding-series/understandi ng-histograms.shtml
I guess your Sigma lens has an aperture ring. Use it, or make sure to keep track of the aperture indication in the veiw finder :-). If your Sigma lens is the 3.5-5.6 version (not the 2.8), you should use TTL flash (I guess the RTF always does?) because this lens narrows the aperture (down to 5.6). Remember that the light reduces to the power of 2 of the distance to the subject and the aperture gets smaller at the same time, while zooming in. So, the RTF may not reach far enough for the 50mm setting, thus getting under exposured frames. I never really could understand all the discussions about exposure problem with a flash and the *ist D. Althoug my Pentax AF280T slightly overexposes at lager apertures, the Metz 32 Z-2 and the Pentax AF500FTZ delivers correctly exposed images at a rate fo perhaps 95% of the time. I get usable photgraphs all the time with the *ist D, unless I overexpose by underestimating very small, brigt spots in the frame. Some times I "underexpose" deliberatly to avoid or lower the risk of burned out high lights. If you shoot RAW, there should be reasonable latitude for adjusting in a good RAW converter? Jens Bladt mailto:[EMAIL PROTECTED] http://hjem.get2net.dk/bladt -----Oprindelig meddelelse----- Fra: Mark Roberts [mailto:[EMAIL PROTECTED] Sendt: 8. november 2004 21:54 Til: [EMAIL PROTECTED] Emne: Re: shot first event with *istD... "Amy Hughes" <[EMAIL PROTECTED]> wrote: >Unfortunately almost everything turned out underexposed. I previewed >every shot on the screen and they looked fine there. What do you mean by "previewed"? Did you check the histogram or just look at the photo? The histogram is how you determine whether the shot was really exposed correctly. >Grrrr. Maybe I need >to take a laptop to check the images. I can fix the exposure with >acceptable results in PS. I shot everything RAW. Good call for the circumstances :) -- Mark Roberts Photography and writing www.robertstech.com
