Nikon Z TELECONVERTER TC-1.4x

I mounted this on my 400mm lens for a soccer match and the extra reach was exactly what I needed without losing much sharpness. The autofocus stayed quick enough to track players running across the field.

The 1.4x converter holds focus surprisingly well even in dim light, and the extra reach made a real difference on a cloudy day photographing herons from a distance. Build feels solid and weather-sealed, which gives me confidence when the drizzle starts.

Used it for a weekend of birding and the autofocus stayed snappy even at 560mm equivalent. The extra reach turned distant specks into frame-filling shots I'd normally have to crop heavily. It's compact enough to leave attached in my bag, which makes me grab it way more often.