The Sigma 30mm f/1.4 DC DN Contemporary lens is an excellent choice for photographers looking to capture stunning images in low-light conditions and achieve beautiful bokeh effects. With its large f/1.4 aperture, this lens allows for faster shutter speeds and better performance in dimly lit environments. The lens is designed for APS-C and Micro Four Thirds cameras, offering a versatile focal length that is perfect for portraits, street photography, and everyday shooting. The lens also features a stepping motor for fast and quiet autofocus, making it ideal for both stills and video recording. One downside to consider is that the lens may exhibit some chromatic aberration and distortion at wide apertures. However, these issues can be easily corrected in post-processing. Overall, the Sigma 30mm f/1.4 DC DN Contemporary is a fantastic lens for photographers seeking professional-quality results without spending a fortune.

The Tamron 18-200mm f/3.5-6.3 Di II VC is a versatile all-in-one zoom lens that covers a wide range of focal lengths, making it perfect for travel and everyday photography. Its compact and lightweight design makes it easy to carry around, while the Vibration Compensation (VC) system ensures sharp and blur-free images even in low-light conditions. The lens features a minimum focusing distance of 0.5m, allowing you to capture stunning close-up shots. The 7-blade circular aperture creates beautiful bokeh, adding an artistic touch to your images. However, the variable aperture of f/3.5-6.3 means that it may not be the best choice for low-light situations or fast action photography. But for those looking for an affordable and versatile lens that can handle a variety of shooting scenarios, the Tamron 18-200mm f/3.5-6.3 Di II VC is an excellent option.

The Canon EF-S 10-18mm f/4.5-5.6 IS STM is a versatile wide-angle lens that is perfect for capturing stunning landscapes, architecture, and interior shots. Its compact and lightweight design makes it an ideal travel companion, and the built-in Image Stabilization (IS) system helps to minimize camera shake for sharper images. The lens features a stepping motor (STM) for smooth and quiet autofocus, making it suitable for both still photography and video recording. The optical design includes one aspherical element and one ultra-low dispersion element, which help to reduce chromatic aberrations and improve overall image quality. While the maximum aperture of f/4.5-5.6 may not be ideal for low-light situations, the lens still offers excellent performance and value for its price. If you are looking for an affordable wide-angle lens to expand your creative possibilities, the Canon EF-S 10-18mm f/4.5-5.6 IS STM is a great choice.

The Nikon AF-S DX NIKKOR 35mm f/1.8G is a versatile prime lens that offers excellent performance at an affordable price. With its large f/1.8 aperture, this lens is perfect for low-light shooting and creating beautiful background blur (bokeh) in your portraits. The 35mm focal length is ideal for street photography, capturing natural-looking images with a slightly wider perspective than the standard 50mm lens. The lens is designed for Nikon DX-format cameras, providing a 52.5mm equivalent focal length on a full-frame camera. The Silent Wave Motor (SWM) ensures fast and quiet autofocus, making it suitable for both stills and video shooting. One downside is that this lens is not compatible with full-frame Nikon cameras, but for DX-format users, it is a fantastic option that offers great value for money.

The Sony E 50mm f/1.8 OSS is a compact and lightweight prime lens that offers excellent image quality and performance at an affordable price. With its large f/1.8 aperture, this lens is perfect for capturing stunning portraits with beautiful background blur (bokeh) and low-light photography. The Optical SteadyShot (OSS) image stabilization helps to minimize camera shake, ensuring sharp images even in challenging lighting conditions. The fast and silent autofocus system makes it ideal for both stills and video shooting. However, this lens is designed specifically for Sony E-mount cameras with APS-C sensors, so it may not be compatible with all camera models. But for those with compatible cameras, the Sony E 50mm f/1.8 OSS is a fantastic choice for capturing stunning images without breaking the bank.