There is no cap on the number of bonus points you can get as long as you transfer before 30 June 2019.
DBS has introduced Qantas Frequent Flyer as a partner not too long ago, and now they are offering a promotion, offering an additional 20% bonus points for all conversions made from now until 30 June 2019.
DBS points need to be converted in blocks of 5,000 points for 10,000 Qantas points, with no cap on how many points you can transfer in each transaction. Note that the conversion fee of $26.75 will apply for each transfer.
The 20% bonus points will be credited on the 14th of each subsequent month. For instance:

Good redemption rates for Australia, Emirates
With Singapore Airlines devaluing their miles earlier this year, Qantas Frequent Flyer is now competitive in the redemption rates.
For instance, it will cost you 60,000 Qantas points for a one-way business class ticket to Sydney, as compared to Singapore Airlines’ 62,000 miles.
At the time of writing, there is also no easy way to redeem for Emirates flights and there is also a clear lack of credit card partners to credit miles into Emirates Skywards.
Qantas’ partnership with Emirates means that you can use your Qantas points to redeem for Emirates services anywhere on its network.