The Nikon 105mm F2.8 AIs Micro-Nikkor lens replaced the decade-old earlier Nikkor classic Micro-Nikkor 105mmf/4.0s. Nikon 105mm F2.8 AIs Micro-Nikkor lens has a full stop faster in its maximum aperture and thus bringing it close to be a all round telephoto-Macro lens. It was debuted as a Ai-S native Nikkor and its immediate benefit is enabling many MF.AF Nikon SLRs be able to use in multi-exposure modes such as Programmed AE and Shutter Priority AE as long as the aperture is stopped down to its minimum aperture at f/32.
The manual-focus Nikon Micro-NIKKOR 105mm f/2.8 has excellent optics and mechanics. It is at least 90% as good as today’s newest 105mm lenses wide-open, and at least as good stopped down. Unlike the newest lenses, it is manual-focus only, which is ideal for macro work.