You have no wide angle AOV lens...so in a wedding/ reception setting, you may be too close to capture the entire group in the limited shooting space from which you need to stand.
- With 45mm, at a shooting distance of 10' the FOV is scarcely 5.2' x 7.6' seen in frame...you would be cutting off bottoms of legs or top of heads and still not fitting more than about 4-5 people horizontally!
- You would need to be 15' away with 45mm FL to capture 8' x 12' within the frame.
My experiemce with weddings is that 28mm FL provides good WA capability without you running the risk of 'induced perspective distortion' of body parts exaggerated in size by being at too-close shooting distances while shooting people.
28mm FL allows 10' shooting distance while capturing just over 8' x 12' area in the FF frame. Try to stay 10' away, no matter what FL you use, to avoid induced perspective distortion!!!
Left photo, the induced perspective distortion exaggerates the size of my right hand...rightmost photo my right hand is NOT so much larger that my left hand! Same FL for all shots (FL is
NOT the cause!), but a more reasonable shooting distance shows hands about the same size.
Ample-bodied women hate seeing their upper arm closest to the camera exaggerated in size, it makes them look fatter; men dislike the beer gut made larger, too. Other body parts can be similarly affected by too close shooting distance.
Otherwise, 45mm and 85mm both are probably sufficient, in both AOV and speed of fastest aperture, particularly with the high ISO capability of the digital camera.
An issue may be that things are getting somewhat dim in the sunset light, as sunset is about 6:10-6:15pm in Virginia in October. And if you try to shoot dance floor shots indoors, things get very dim on the dance floor (by planned low light). My suggestion is to get yourself some supplementary light source, either battery powered LED or a speedlight (and learn to use it before the wedding day!!!)