Review on Canon RF 100-400mm f/5.6-8 IS USM Lens in Black by Iyaan Betrann ᠌

I thought for a long time whether or not to take this lens for shooting birds - I chose between it and the tamron / sigma 150-600. Tamron rented it for a drive: pumped up the bitsukha, cursed the focusing mechanism and handed it back to the store. Then I thought, maybe save up and take the RF 100-500? In search of an answer, I watched a video of one photographer who had a similar choice, and he asked himself: "Will 100-500 make me much happier than 100-400?" So I thought and took 100-400. I shoot almost always at the very far end, only occasionally "folding" up to 300 mm, when some brave chaffinch decides to come closer. From 100 to 300 I don’t shoot at all. Canon would have made some democratic fix 400 mm, if not 2.8, but something like 4-5, so that it would be smaller and cheaper in size - I would immediately take it by selling this one. In general, I realized that 400 mm is the golden mean for shooting birds. You can also consider 600, but these will already be different sizes and prices, and physics begins to intervene, so it’s better to carefully reduce the distance to the object yourself - on tiptoe or frozen. I am attaching examples of photos of birds in different weather conditions. Filmed with RP. Robin - ISO 1600. Tap dance - 3200.