The Sony KD-55XE9305 returned different lag times depending on whether the incoming signal was 1080p or 2160p. With a HD Linker device upscaling the 1080p output from our Leo Bodnar tester to 4K, input lag measured 25ms (which is very responsive) in both SDR and HDR modes. However, sending a 1080p video signal to the TV bumped input lag up by one frame to 42ms, presumably due to the set’s internal upconversion.
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