Purchased the 1.4 teleconverter a while ago and only recently got to give it a bit of a workout with XT-5 and 50-140, 70-300. Purchased the 1.4 teleconverter a while ago and only recently got to give it a bit of a workout with XT-5 and 50-140, 70-300. Purchased the 1.4 teleconverter a while ago and only recently got to give it a bit of a workout with XT-5 and 50-140, 70-300. Purchased the 1.4 teleconverter a while ago and only recently got to give it a bit of a workout with XT-5 and 50-140, 70-300. Purchased the 1.4 teleconverter a while ago and only recently got to give it a bit of a workout with XT-5 and 50-140, 70-300.