mawz wrote:
Be careful, there are two different 28/2.8 AI-S designs and you only want the later one with the 0.2m close focus.
The first production batch of 28/2.8 AI-S had the AI optical formula and shares the mediocre performance of that lens.
There is one version only of the AI-S 28/2.8, with 8 elements in 8 groups design: http://www.photosynthesis.co.nz/nikon/lenses.html#28
It has a CRC design, and focuses down to 20 cm.
The previous version, focusing at 30 cm instead, was AI (not AI-S), with 7 lenses in 7 groups, even if the maximum aperture was marked in orange.
The AI version misses the notch above lens locking cut out.
To learn the difference between AI and AI-S lenses, click here.
Jun 22, 2020 at 08:43 AM
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