I'm assuming a firmware update is required on the lens but curious if anyone else can recreate this or has had this problem fixed (and if so, what was the confirmed cause):
When using live view video on the 5D4, with the Tamron SP 150-600 (mk1) attached, the 5D4's auto focus does not work (no overlay on LCD, no response to touchscreen, no camera-driven focus on lens). When I manually focus I then experience intermittent bursts of erratic exposure and hallucinogenic colour bursts when bright points of light (from, say, a street light at night) hit the sensor.
When using live view stills on the 5D4, the mirror will not stay locked up, it flips up then back down immediately after you hit start, disabling live view immediately.
FWIW I don't get these issues with my other Tamron lens (15-30 2.8 VC) - the video auto focus isn't *particularly* smooth with that, but everything appears to work as it should.
When using live view video on the 5D4, with the Tamron SP 150-600 (mk1) attached, the 5D4's auto focus does not work (no overlay on LCD, no response to touchscreen, no camera-driven focus on lens). When I manually focus I then experience intermittent bursts of erratic exposure and hallucinogenic colour bursts when bright points of light (from, say, a street light at night) hit the sensor.
When using live view stills on the 5D4, the mirror will not stay locked up, it flips up then back down immediately after you hit start, disabling live view immediately.
FWIW I don't get these issues with my other Tamron lens (15-30 2.8 VC) - the video auto focus isn't *particularly* smooth with that, but everything appears to work as it should.