Most of the gigs I've shot recently either had decent lighting, or were small acoustic/small band shows so I've not used this technique as yet. But tomorrow I'm shooting a fairly energetic metal band in a venue I've not shot in before. So, I think I might try this technique and wanted to ask here if I'm thinking it out correctly.
Venue is small, no idea of lighting, no pit so I will be in the crowd and side of stage, no 3 song rule and I should be able to use flash ( but intend to check with the band first ).
My understanding of Shutter drag with rear curtain flash is I shoot at say 1/60 or lower to capture movement and the flash will pop at the end of the shot freezing the action at that point. So for instance the guitar player is head swaying and I open the shutter and then the flash pops and stops him with perhaps head/hair/guitar movement captured as a blur but the final part of the exposure stops the action and is lit by the flash.
Am I wrong in that assumption and what shutter speeds would be best to use?
I'll be taking my 60d, and mounting my Sigma 30mm f/1.4 and perhaps my 50mm f/1.8
For non flash shots ( depending on the lighting ) I try to shoot at 1/100 sec min, as close to f/ 2.8 as I can get and let the ISO float up to a max of 3200.
When I switch to using rear curtain flash I plan on trying maybe ISO 1600 max, and upping the f stop to maybe 2.8 or more and seeing how long the shutter needs to be.
Is this a good approach to this technique and do you have any suggestions I could use?
Thanks in advance