Moved to Forum: Original Link
Noticed Sydney Trains now allow you to use your Visa, MasterCard and American Express to tap on and off instead of using your Opal card. Been testing it this week and have only been paying $1 per trip. Not sure if it's just for a trial period or a promotion. No idea of ending date. I normally pay $4.40 per trip so $1 is a great price!
Info from opal website:
Contactless payments are now available for standard (peak) Adult Opal fares on Sydney Trains and NSW TrainLink Intercity trains.
If you are catching a train you can now tap on and tap off using an accepted contactless payment card, which means there are more ways to pay for a standard (peak) Adult Opal fare on any train, Sydney Ferries or light rail service within the Opal network.
There’s no need to have an Opal card or wait in a ticket machine queue, just tap on and tap off to pay your Adult fare at an Opal reader with most American Express, Mastercard, Visa credit / debit cards or a smartphone, tablet or wearable device linked to one of these cards.
Contactless fares are now the same price as a standard (peak) Adult Opal fare for the same trip. Opal Daily, Weekly and Sunday travel caps are also applied, making contactless fares more attractive than before.
However some other Opal benefits such as Weekly Travel Rewards, Transfer Discounts, Off-peak train fare discounts, Trip Advantage and free access to Opal Park&Ride carparks are not available with contactless payments.
Being able to pay an Adult fare using cards and devices most people already carry makes public transport more accessible, particularly for tourists and locals who don’t use public transport often enough to need an Opal card. It also offers a handy backup option if you forget or lose your Opal card.
Whether you are heading to the airport, a concert, sporting event or conference or are just want to explore for the day, contactless transport payments mean there’s one less thing to worry about.
From Opal Site, FAQ Number 24