teddib 0 Posted October 1, 2006 OK I know this is probably a bad idea but I am tempted to try it anyway. I have a Canon 1DsMII plus the 100mm/f2.8 USM macro. I have a flat port that works for this combination but if I add the extension ring EF25II things do not fit so well. I am pursuing an adaptor that may work but I may end up making my trip to the far Northern GBR without anything. So here is my question. I do have a domed port for my wideangle lens. The macro fits in this and since the focal distance is fairly long it focuses just fine. What kind of abberation/distortion will I introduce if I attempt to use my macro in a domed port? Just wondering. Tom Share this post Link to post Share on other sites
Paul Kay 65 Posted October 2, 2006 Shouldn't be a problem - I've used a 100 macro behind a dome before now and it worked fine (you'd be hard pushed to tell). Provided you are using smallish apertures (f/16 or smaller) any image curvature shouldn't be significant. Share this post Link to post Share on other sites
teddib 0 Posted October 3, 2006 Thanks for the reply. It is good news that you have tried this. Obviously the rig will be more bulky than optimal but this maybe my only option. Getting psyched for this trip which sounds like it is really out there. I now have to figure if I will only take the still or try to get the video camera along for the flight. Thanks, Tom Share this post Link to post Share on other sites
