thank you Klaus for your fast answer and your precious advices
if i good understand, APG is not able to interpret the different exposures in a RAW file...
it is not possible for me to re-take the pictures
No, no: APG definitely IS able to interprete the different exposures in a RAW file. But i prefer the way i described.
Doing it only in APG in my eyes is too much kind of try-and-error. But it surely works in the end.
tell me if i'm in the wrong way, but the best solution is to generate for exemple 3 or 4 JPG (with different exposures) with a RAW ? and after having 10 pictures for one position and use APG for getting an HDR with more dynamic ?
There is no "best" way globally. There are several ways basing on personal preferences.
I suggest to import the bracketed series into Photomatix, have it made to HDR and use tonemapping. The results you can save as TIFF/8bit or TIFF16bit or as JPGs whatever you like.
The advantage of doing it this way:
1) you have more refined settings for the tonemapping in Photomatix (or Oloneo or other dedicated HDR-processors.
2) you have ONE image per position in the end - which makes it much easier for APG to stitch.
3) you don´t need that much RAM and processor-/graphic speed for the stitch - because you don´t need
to process and stitch THAT much shots in APG.
So the whole process od stitching and editing is easier.
After all it´s kind of matter of taste which way to go. I tried them all very intensely - and decided the one i described works best for me.
PS: when i use RAWs i prefer to use PhaseOne´s CaptureOne for processing the RAWs to TIFFs first before i import the TIFFs into Photomatix for making HDR/Tonemapping.
APG or PTGui also can take RAWs straight. But i realized that processing them first in a dedicated RAW processor is preferable.
The advantage is superb quality. Tge disadvantage is: you have some more steps to do.
Surely it´s more comfortable to use only ONE application for doing it all. But my goal is not to have it comfortable . .