If your sky is good & dark, you should be able to pick out Centaurus A in your 30mm finder, just. I'm not just saying this, I've seen it in a 30mm finder myself.
You'll also be able to make out M104, the Sombrero galaxy, and M83 galaxies in your 30mm finder too. These two can be seen in good binos, like your 47mm, from suburban skies if the light pollution isn't extreme. Again, this is from experience from my home in Sydney.
HOWEVER, this I achieved last year from Sydney's east, and one year down the track, I haven't been able to repeat this things have got so bad,
. One year! In Hobart, you'll have no problem