JohnRLewis 0 Posted November 12, 2004 I just placed an order for a Canon 100mm f/2.8 USM Macro, and a Canon 15mm f/2.8 fisheye. I will soon be purchasing housing and ports from Ikelite for my digital rebel. I was wondering how the Ikelite 5508.45 Manual Focus port works. The lens has a fulltime manual focus overide feature. Does that mean I can use this lens in this port as an autofocus, and overide it as needed? The information on the port up at ikelite claims that AF/MF and ratio switches can not be operated. What does that really mean? Am I better off just buying the 5505.45 autofocus flat port? Share this post Link to post Share on other sites
james 0 Posted November 12, 2004 Hi John, Yes, you can insert the lens into the port in autofocus mode, and the built-in collar will slide onto the focus ring. You can use the focus knob on the front to over-ride the autofocus if you want. It's pretty cool. Cheers James Share this post Link to post Share on other sites
segal3 0 Posted November 12, 2004 Always run this lens in AF mode. The 100mm USM macro allows you to make manual focusing adjustments *at all times*, without having to worry about stripping gears or anything of that sort. Ratio switches simply set a limit on the near focusing distance...you won't want to bother with these since you'll be shooting macro anyway. Does that mean I can use this lens in this port as an autofocus, and overide it as needed? Exactly. Am I better off just buying the 5505.45 autofocus flat port? No. Unless you really want to save $20-30 or something like that... ~Matt Segal Share this post Link to post Share on other sites