Bo-Ming,
  You might want to try the contrast control function with one 360FGZ
  wireless unit, if you need that uniform lighting in depth. Also, I
  don't know what camera you are using, but note that MZ-S and later
  bodies do a much better job of flash metering with their P-TTL mode.
  Former MZ/Z either overexposed the foreground or underexposed the
  background, depending on the subject position in the frame.
  Finally, I doubt the IS will make any difference at f45 and above
  1/15. It just won't compensate for the people movements. You might
  as well try a tripod setup to judge the outcome.

  Servus,  Alin

Bo-Ming wrote:

BMT> I am tempted to buy a used Canon 28-135 IS and borrow a Canon but before 
BMT> I do so I wish to hear your opinions whether this is a stupid idea.

BMT> I have been doing bounce flash indoors a lot using a shoe-mounted flash. 
BMT> I started out with f/5.6 at 1/30 on ISO 800 film rated at 400 or 500, 
BMT> and got nicely illuminated pictures. Ambient light is only 1 or 2 stops 
BMT> below flash light. However, there was once I get blurred images. I 
BMT> wasn't sure whether it was my handshake or people moving, but it is not 
BMT> possible to handhold a 45mm lens at 1/30 and expect sharp results. So I 
BMT> switched to 1/60 last time. There was also not enough depth of field 
BMT> sometimes so I used f/8. My flash can still output that much power. My 
BMT> images came back not very satisfactorily. While the near objects are 
BMT> still nicely illuminated, the far objects are completely dark. I used to 
BMT> get at least some detail off the far objects.

BMT> As you can see, I am torn between a handholdable shutter speed, depth of 
BMT> field, and ambient lighting. Would an IS lens take the first one out, so 
BMT> that I can use an even slower shutter speed such as 1/15 and capture 
BMT> ambient light while keeping the aperture small for depth of field ? 
BMT> Obviously this can only help my hand shake but not people moving.

BMT> Or, should I "just do it" and use 1/15 since the far objects are out of 
BMT> focus and the near objects are mostly illuminated by flash at a speed of 
BMT> around 1/500 ? This might result in a sharp image with a blurry trail, 
BMT> though, if the flash light does not greatly outshine the ambient light, 
BMT> which seems to defeat the original purpose of capturing ambient light 
BMT> using a slow shutter speed.

BMT> Any comments ? I don't want to go Canon because of IS... I didn't 
BMT> realize there is any use for IS/VR until now.

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