Wedding Advice

It depends on exactly what 'auto' you mean .... If its ' Green Mode' auto then surely that would be hard to recommend, at least for something important like this (you lose all control... No exposure or flash compensation, no ISO , aperture or shutter speed control).

P mode might be useful so long as you are quick to chimp and make EC and hyper-shift adjustments. I'm wondering about 'auto-iso' for this event (accessed via Tav mode) .... You can set your limits in the control panel (eg ISO 200-3200) , then just concentrate on aperture and shutter, which you could use to control DOF depending on focal length and controlling movement.

P-TTL flash will automatically adjust output to match your changing settings (including the auto iso changes) and you have flash compensation if needed.

I would agree with Nigel about not recommending green mode. You would have no control over too many elements, might as well take a decent point and shoot as do that. Use the mode that you are most familiar with. Don't sell yourself short. You have some very nice shots in your p/f. Try and have some sort of plan of how the day will go, times, travelling, venue, meals, speeches and of course the b & g. If you haven't already done so I'd fine tune your lenses, don't want to end up with perfectly exposed and composed shots only to find that the focus is slightly off. And try and enjoy the day, (try) )
Derek.

Yes I agree, I was playing around with Green mode and am not happy with the high ISO.

Tav is dangerous in a fast moving situation, if it suddenly becomes too bright you may have a lot of ruined shots (RAW or not) before you remember to check, as the camera can't shut down.
You're probably right about Green. it can be a bit dumb, but if you're in a tizz due to the pressure, it could be better than going to pieces with the compositions etc. A good photo is a good photo whatever the camera

As far as I recall the ISO range limits apply equally to green mode and Tav, so you can still take that degree of control even in green mode .... You access the auto-iso range easily from the control panel (info button when in rec mode) and its among the top I think. But I agree with others that there is not enough control in green mode over the other essential aspects (exposure and flash compensation have got to be two crucial ones here) to make it a serious option.

Mark, I take the point about Tav, but we have the choice to go as low as iso 100 in our range setting which should keep brightness in check don't you think ( assuming the shutter time value is under wraps( .... Perhaps the answer is to decide on an absolute minimum shutter time (eg 1/60th) and make sure you never go below it ?

No, you step outside the church where you've been on f3.5 and 1/60th TAV and bam! everything is massively over-exposed. Even on an overcast day that would be 2 stops over. Fatal with a wedding dress.
So you're back to hurriedly twiddling dials, whilst running backwards and composing shots, because the couple forgot everything you told them about slowing down

Doesn't sound like much fun!

I have been watching a photographer who shoots many high end weddings etc with film and digital he uses program mode on his digital, so as not to miss the shot of the moment.

Yes I've set my Zed up to have various goto 'User' modes for different situations.
It's definitely the way to go, if you're disciplined enough (I still manage to forget )