I recently attended a model photo shoot sponsored by Sigma. They had 8 backdrops set up. 4 of the setups were continuous daylights with large soft boxes. 3 of the setups were tungsten. The 8th setup was strobe for shooting with their Sigma SD1 Merrill. I was disappointed that the setups were like this. The lighting was such that I had to shoot ISO 800 with lens wide open to get a decent shutter speed. If I am shooting wide open I want it because that's the depth of field I want, not just so I can get a good shutter speed. I asked one of the PROs that was there to help if she shoots like this professionally. As expected she told me she uses strobes for better control and lower ISO. I know part of the reason is it is difficult to allow 80 or 100 photographers to use strobes with their own cameras but I also think part of it is to sell people on their Sigma SD1 Merril. Each shooting setup had 12 to 15 photographers crowded in front of the model pushing trying to get the best spot for the capture. When those less experienced photographers get home and look at their photos at ISO 800 wide open and compare with the images shot on the Sigma at ISO 100 f\9 they will see a big difference and think they want to switch to the Sigma SD1.
Sigma had several lenses we could barrow. I barrowed the Sigma 70-200mm f/2.8 EX DG OS HSM. Seems like a nice lens for the price but as I go through the images I feel that the focus was not consistent.
The models themselves were great. Beautiful and good at posing in many different ways. Here are a few of mine from the shoot.

IMG-0743 by clemmb60, on Flickr

IMG-0522 by clemmb60, on Flickr

IMG-0435 by clemmb60, on Flickr

IMG-0328 by clemmb60, on Flickr

IMG-0136 by clemmb60, on Flickr

IMG-1174 by clemmb60, on Flickr

IMG-0954 by clemmb60, on Flickr
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