Optics producer Tamron has issued a product advisory informing customers that three of its E-mount prime lenses endure points that stop them from utilizing autofocus when capturing movies on Sony a7 IV digital camera programs.

The announcement, revealed by Tamron Japan, says the corporate has confirmed its 20mm, 24mm and 35mm F2.8 Di III OSD M1:2 lenses, launched in 2019, have an autofocus subject when paired with Sony’s full-frame a7 IV digital camera system that causes the lenses to change from ‘AF’ to ‘MF’ when capturing films.

Tamron suggests it isn’t certain what’s taking place, however hopes to repair the ‘phenomenon,’ saying ‘We’re presently investigating and can present particulars on the “Assist Info” web page at a later date.’ Primarily based on the issue, it will appear a easy firmware repair might deal with this subject.

You possibly can preserve tabs on the newest bulletins through Tamron Japan’s Assist Info web page.