"It's just like 35 millimetre; it's being phased out," Mrs Simpson said.
The new gear will cost the about $70,000 and the trust is part-way there with a $10,000 grant from Powerco and $10,000 from its own fundraising.
Mrs Simpson hadn't put a time frame on when the money needed to be raised by but "the sooner we get it done the sooner the community can reap the benefits of it".
A stockdrive and further fundraisers had been planned to get the remaining money.
"I think once we're on digital [the new system] we'll be fine for quite some time."
Mrs Simpson said the theatre was important to the town and the money was well worth it to get it up to date.
"It's a beautiful environment with a lot of history. We are a small town and it's a place people can get together and have a good time.
"There's a lot of memories," she said.