The gears are as follows and contain all set screws and show only signs of normal use/wear unless noted below:
18656- this is an older gear for a Nikon 200mm micro lens focusing- had it custom made by Aquatica and it is not anodized (still silver) 3" inner diameter (id)
18672- for Nikon 15mm f/3.5 Manual Focus 2 5/8" id
18674-for Nikon 20mm AF lens focusing 2 3/4" id
18675--this is the 2/3 wrap variety (not a complete circle like the others) and fits the Nikon 24-50 zoom lens- a killer lens for fish close-ups that can be found on ebay at a reasonable price and uses the same ext ring as the 105mm macro- gear is 2 13/16" id
I also have an 18619 aperture gear that was used for Aquatica 5 and later housings- consider it an extra freebee from this fall clean-out effort.
a google search may bring up other uses for these that I dont know of- $55 takes them all with shipping included to US addresses- if overseas, add $10 to cover extra postage.
