Birds in Vancouver(Great Horned Owl)-Vol.30 温哥华鸟类 (大角鸮)

The Great Horned Owl (Bubo virginianus) is one of the most iconic and powerful raptors in North America, and a year-round resident of the Metro Vancouver region. Instantly recognizable by its prominent ear tufts, piercing yellow-orange eyes, and robust build, it projects an unmistakable sense of authority. Highly adaptable, the Great Horned Owl inhabits forests, wetlands, farmland, and even urban edges. Primarily nocturnal, it relies on exceptional hearing and vision to hunt prey ranging from rodents and birds to rabbits.

大角鸮（Great Horned Owl，学名 Bubo virginianus）是北美最具代表性的猛禽之一，也是大温哥华地区全年可见的顶级捕食者。它以显著的“耳羽”、橙黄色的眼睛和强壮的体型而闻名，外形威严而充满力量感。大角鸮适应能力极强，栖息环境涵盖森林、湿地、农田，甚至城市边缘地带。主要在夜间活动，凭借极其敏锐的听觉与视力捕猎，从啮齿类、小型鸟类到兔子等猎物都在其食谱之中。

 

Great Horned Owl 大角鸮 | Canon R5 + EF 400 5.6L

Canon RF 45mm F1.2 STM 佳能45mm F1.2

Canon RF 45mm F1.2 STM is a recently released affordable large-aperture prime lens. I placed my order immediately after the launch event, and it arrived after nearly a month of waiting. This is my first F1.2 lens, and I decided to test it alongside the RF 50mm F1.8 STM, which has a similar focal length but is smaller and more compact.

佳能 RF 45mm F1.2 STM 是最近发布的廉价大光圈定焦镜头，我在发布会后马上订购，等待了接近一个月后到货。这是我的第一支F 1.2光圈镜头，和我手头定位接近、体积更小的RF 50mm F1.8 STM做一个对比测试。

In terms of size, it is roughly twice as large as the ultra-portable RF 50mm F1.8 STM, yet it remains very lightweight. The aperture is noticeably larger, and once a UV filter is attached, the lens effectively behaves like an internally focusing design.

体积大概比最便携的RF 50 F1.8 STM大一倍，但是重量仍然很轻巧，通光口径明显变大，加一个UV滤镜后相当于内对焦。

Regarding resolution, the image is slightly soft when shot wide open at F1.2. Center sharpness is usable for atmospheric portraits and night street photography where ultimate resolution is not critical, while edge sharpness is noticeably weaker. However, this is not a major concern unless one intends to shoot landscapes wide open. Given that it costs only a fraction of the price, it is unsurprising that it cannot match the image quality of the RF 50mm F1.2L. I have not used the older EF 50mm F1.2L, though it is generally said that this new lens performs slightly better. Once stopped down to F1.8, it becomes difficult to see a clear difference compared to the RF 50mm F1.8 STM. Further stopping down to F8.0 reveals the solid optical performance expected from a prime lens.

分辨率方面，光圈F1.2全开画面稍软，中心画质在氛围人像、夜景街拍这种不追求极限分辨率的场景下可用，边缘比较糊，但不用大光圈拍摄风光的话也无所谓。只有几分之一的价格，画质肯定没有办法和RF 50 F1.2L相比，我也没有用过旧的EF 50 F1.2L，据说新镜头还略好一点。光圈收到F1.8后，和RF 50 F1.8 STM相比，很难看出显著差距了。而再次收光圈到F8.0，体现出了定焦应有的素质。

 

Background blur is clearly more than that F2.8 or F1.8 lenses. At the same time, the 45mm focal length does not completely dissolve the background like fast telephoto lenses do, especially during night shooting where numerous light points remain visible. One thing worth noting is that the bokeh highlights tend to be slightly lemon-shaped rather than perfectly round.

背景虚化显著超过F2.8和F1.8的镜头，同时，45mm的焦距又不像大光圈长焦镜头那样把背景完全模糊，尤其在夜拍时有大量的光斑。但是，值得注意，光斑接近柠檬型而非完美的圆形。

Here are some sample images taken with the EOS RP and EOS R5. Considering the positioning of this lens, it will likely be paired more often with smaller, non-stabilized bodies such as the RP or R8. The lens itself does not feature image stabilization either, but for night shooting this is rarely an issue, as acceptable shutter speeds can be achieved at ISO 400–800. However, the lack of stabilization does make handheld long-exposure shooting difficult. When paired with a full-frame camera for night photography, the lens can produce a very pleasing atmospheric look.

这里是一些样片，分别用EOS RP和R5拍摄，鉴于这颗镜头的定位，可能有更多的人搭配RP/R8这种轻巧、没有防抖的机身来使用，镜头也没有防抖，但夜间安全快门仅需400-800的ISO，完全不需要。但因为没有镜头防抖很难进行手持长曝光等操作。搭配全画幅拍摄夜景，能够取得相当不错的夜间氛围效果。