Originally Posted by wjlapier
The Chinese hood for the 28 S mount looks very close to thickness as the Yama.
Left, the regular tilted-vented hood - which is 100% similar to the Yama hood - on the W-Nikkor-C 35mm f/2.5. Right, the tilted-vented hood designed for wide-angle lenses on the W-Nikkor-C 28mm f/3.5.
The latter is 10mm shorter and 10mm wider.