Crossroads
Suspended / Banned
- Messages
- 532
- Name
- Ray
- Edit My Images
- Yes
However, unlike a DSLR the A7 has contrast-based AF to work with still, which will work at any f stop as long as it has sufficient light. In fact A7r users do this all the time, since they have no PDAF anyway.Well I do think from a sharpness perspective the IQ difference would be acceptable. But as you rightly said, the AF would need to work.
1.4x is better than no TC at all.![]()
Actually, I'll take that one step further and point out that if you have live view effect on in the settings, you will AF at whatever the aperture is set at in-camera anyway - the lens doesn't open up to AF. So, the camera is already fully capable of auto-focussing at f8 and beyond. I can't tell if it's using the PDAF sensors when doing so or not, but the camera can clearly manage it however it does so.
TL;DR - 1.4x and 2x teleconverters are entirely practical from an autofocus point of view.

