hector_evans Posted March 17, 2008 Share Posted March 17, 2008 Am I supposed to <br><br>a) mount the tube on body first, and then mount the lens on the tube? <br><br>or<br><br>b) mount the tube on the lens first, and then mount the assebly on the body?<br><br>And what if I do it the wrong way? I remember reading something in the instructions that came with my Kenko extension tubes, but I can't find them!<br><br>Thanks Link to comment Share on other sites More sharing options...
tommyinca Posted March 17, 2008 Share Posted March 17, 2008 It doesn't matter. If it is the same lens on the body, I tends to put the tube on the body first (to protect the mirror and sensor from dust). If not, the lens first. Link to comment Share on other sites More sharing options...
mark_chappell Posted March 17, 2008 Share Posted March 17, 2008 Doesn't matter, as Tommy says. Link to comment Share on other sites More sharing options...
geoff_foale Posted March 17, 2008 Share Posted March 17, 2008 While I can't see the difference, Canon do state that their tubes should be mounted firstly onto the lens and then the lens plus tube onto the body. Disassembly is the reverse. Kenko is probably the same. Perhaps some kind person will give us the reason why. Link to comment Share on other sites More sharing options...
mark_chappell Posted March 17, 2008 Share Posted March 17, 2008 <I>Perhaps some kind person will give us the reason why.</i><P> The only thing I can think of is in the unlikely event that you trigger the shutter with only a tube mounted, you might get an error that wouldn't occur if nothing was mounted. I've been mounting and unmounting tubes and extenders for years in mostly random order -- must have done it thousands of times -- and have not had a single problem. Caveat: I got consistent ERR99 warnings when I had a heavy camera hung from a stack of Kenko tubes, which visibly flexed under the load. But that was independent of the order in which tubes, lens, and camera were attached. Link to comment Share on other sites More sharing options...
hector_evans Posted March 17, 2008 Author Share Posted March 17, 2008 Thanks to all for your responses. Link to comment Share on other sites More sharing options...
lester_wareham Posted March 18, 2008 Share Posted March 18, 2008 "I got consistent ERR99 warnings when I had a heavy camera hung from a stack of Kenko tubes, which visibly flexed under the load." Yes my set were so loose they would dismount the lens without warning nearly causing the loss of a 300 f4 IS on one occasion. I soon changed to a stack of Canon tubes. The lockup securely and have no flex or rotation. There is a tendency to try and save money on tubes, there just air right! However it does seem the Canon ones are made much more accurately. Link to comment Share on other sites More sharing options...
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