Focal 90-210mm f/4

as it has a maximum aperture of f/4. It is a well-built photo lens with high-quality glass elements and lens coatings to minimize flare and ghosting. The lens has a solid build quality and is designed to last for a long time. The resolution of the lens is excellent, producing sharp and detailed images. The bokeh, or the quality of the out-of-focus areas, is pleasing and smooth, making it a good choice for portrait photography. The lens has no autofocus, so it requires manual focus, which can be challenging for beginners. However, this also makes it a good option for photographers who prefer to have full control over their focus. The lens has a long focal length range, making it versatile for a wide range of photographic applications, from portraits to wildlife photography. The manufacturing time for this lens is not specified. Overall, the Focal 90-210mm f/4 is a good option for photographers who want a high-quality ultra telephoto zoom lens with excellent optics and build quality. There are alternatives available in the market, but this lens is a good choice for those who prefer manual focus and want a solidly built lens with excellent resolution and bokeh.

Optical design

Great choice mainly for good light conditions