One "avid Middle-earth fan", who had flown to New Zealand from Australia for the premiere, said their eyes couldn't take everything in, the Sunday Times reported.
Another viewer commented on Twitter that the technique worked well for the snowy mountain shots, but close-up pictures strobed.
Jackson debuted Hobbit footage at the high frame rate the the annual CinemaCon convention in the US earlier this year.
It met a mixed reaction, with some audience members complaining the footage looked too real.
However, it was reported the 48fps footage had improved significantly by the time of the film's premiere in Wellington last Wednesday.
Hollywood producer and director Bryan Singer praised the high frame rate in a tweet sent after the premiere.
"Just saw #Hobbit. Having some serious frame rate envy. Amazing and involving. Loved it! And @ianmckellen118, my friend, you are brilliant!," he wrote.
- Herald Online