Check price of the Fujifilm 70-300mm and 100-400mm on B&H Photo Video*: - Fujinon XF 70-300mm: https://bhpho.to/3samRMI - Fujinon XF 100-400mm: https://bhpho.to/2F6e09j Today’s Photo Gear Deals & Rebates on B&H: https://bhpho.to/2QvHVZy *Mathieu Gasquet and Heather Broster are participants in the B&H Photo Video affiliate program. If you decide to buy something after clicking the affiliate links above, we will receive a small commission. Text version here: https://mirrorlesscomparison.com/x-mount-lenses/fuji-70-300mm-vs-100-400mm/ My Birds in Flight Test and Ranking: https://mirrorlesscomparison.com/best/mirrorless-cameras-for-birds-in-flight/ Fujifilm X-T4 Birds in Flight Review and Tutorial: https://www.youtube.com/watch?v=5L8Jr0R5wmE Chapters: 0:00 Introduction, size and weight 1:27 Design: XF 70-300mm 2:55 Design: XF 100-400mm 4:50 Optical Quality 7:24 Bokeh 7:56 Other Characteristics 8:33 Autofocus 9:56 Min. Focus and Manual Focus 10:29 Stabilisation 12:34 Teleconverters 14:25 X-T4 and X-S10 16:08 Conclusion