Canon is said to be on the verge of releasing a new EF 50mm f/1.8 IS USM lens in April, 2015.
If true, the current EF 50mm f/1.8 II lens will be replaced by a new EF 50mm f/1.8 STM lens at the end of March or during the first few days of April.
There are no specs or the price information leaked at the moment. So differences with the existing 50mm f/1.8 are unclear but from the name of the new model, we can say it will employ a Stepping Motor (STM) autofocus drive.
Canon EF 50mm f/1.8 STM lens release date set for April 2015
When we look at the recent Canon rumors, the Company might follow its announcements with the 70-300mm f/4-5.6 IS lens model. Rumor mill already in talks of an EF 70-300mm f/4-5.6 IS lens successor is in development and on its way.
As for Canon, there is also another bright prime lens expected to arrive this year. The EF 35mm f/1.4L II USM lens is the one we can see sometime during the third quarter of the year.
But for now the Canon EF 50mm f/1.8 STM lens release date has been scheduled to take place sometime in April 2015.