Phyl said:the number of stops you lose is dependant on the length of the tubes. If you bring a tripod to Andy's meeting I can let you sample. I have some that Renee gave to Steve68 (that I haven't remembered to hand off yet) and another one that she gave to me (thanks again, Renee, I love it). You're welcome to play. Some are kenco and one is Nikon.
Absolutely right. i don't like Phyl now. she keeps get all the right answer where I try to charm inPhyl said:And if you're using a tripod to capture the image the loss of light is compensated by a longer shutter time. The only time that loss is signficant is when you're trying to capture fast moving fish, in which case I'd shoot without the tubes and crop the image.