Is the Nikon 85mm f/1.8 G Worth It for Your 105mm f/2.5 AI-s Lens?

The Nikon 85mm f/1.8 G and the 105mm f/2.5 AI-s lenses are both high-quality options in their respective categories. Deciding whether to purchase the 85mm f/1.8 G can be a tough decision when you already own the 105mm f/2.5 AI-s. In this article, we will explore the key factors to consider and help you determine if the 85mm f/1.8 G offers value for your photography needs.

1. Focal Length and Field of View

Firstly, let's discuss the focal lengths of both lenses. The 85mm f/1.8 G offers a slightly narrower field of view compared to the 105mm f/2.5 AI-s. The field of view difference is minimal, but it is noticeable. For most photographers, the 105mm provides a versatile focal length that is ideal for a wide range of subjects, including portraits, landscapes, and action shots. The 85mm can be more suitable for specific scenarios where a slightly narrower field of view is beneficial, such as in studio setups or when working with a tight space.

2. Maximum Aperture and Light Absorption

The maximum aperture of the 85mm f/1.8 G is slightly wider than that of the 105mm f/2.5 AI-s, which means the 85mm can allow more light into the camera. This can be a significant advantage in low-light situations, as it can help achieve faster shutter speeds, resulting in sharper images and better low-light performance. However, it's important to note that both lenses are quite capable in low-light conditions, and the difference in light absorption is not as dramatic as you might think. The 105mm f/2.5 AI-s lens is still very effective in low-light scenarios, making it a solid choice.

3. Image Quality and Sharpness

When it comes to image quality and sharpness, both lenses are considered excellent. The 105mm f/2.5 AI-s is notoriously well-regarded for its optical performance and can deliver sharp images across the board. The 85mm f/1.8 G, on the other hand, is also known for its exceptional sharpness and clarity, especially when used at larger apertures. Both lenses are capable of producing high-quality images, but the choice might come down to personal preference and specific shooting requirements. If image sharpness and quality are your top priorities, both lenses would be a great choice.

4. Auto-Focus Capability

One key difference between the two lenses is the presence of auto-focus (AF) in the 85mm f/1.8 G. While the 105mm f/2.5 AI-s lacks AF, the 85mm f/1.8 G offers this capability. Auto-focus can be incredibly useful, especially when you need to follow a moving subject or shoot in fast-paced environments. However, if you are comfortable with manual focus, the savings in cost could be better spent elsewhere. The 105mm f/2.5 AI-s is still a very capable lens without AF and can perform excellently in many scenarios.

5. Studio and Critique Scenarios

In certain studio scenarios, the 105mm f/2.5 AI-s might require intermediate apertures to achieve the desired results, especially if there are strong background highlights that cannot be eliminated. The 85mm f/1.8 G's wider aperture could be beneficial in such cases, providing more control over the bokeh and potentially better results. Additionally, the slightly wider field of view of the 85mm f/1.8 G might be more appealing from an artistic standpoint in some studio setups.

In conclusion, if your primary concerns are low-light performance and auto-focus capability, the Nikon 85mm f/1.8 G could be worth the investment. However, if you prioritize versatility, image quality, and are comfortable with manual focus, the 105mm f/2.5 AI-s remains a solid and cost-effective choice.

Ultimately, the decision comes down to your specific needs and preferences. If you're unsure, it might be helpful to test both lenses side by side and see which one feels more natural and beneficial for your photography style.