carpenter wrote:
Great help Dave, Thanks.
When you are shooting with tubes (which is new to me) do you lose any sort of quality by using more than one?
When shooting with a 100mm and tubes, how close would one need to be to the subject (let's say it was a bug) to attain a nice tight shot?
OK - tubes won't lose you any optical quality at all as there is no glass! It's just a tube filled with air. With my Sigma 150mm, at 1:1 on the focus ring, I'm around 20cm from the end of the lens to the subject distance wise. The 100mm variants will be around 5cm closer. The tubes will allow you to get a bit closer, and slightly more magnification, I'm not sure how much closer as in all honesty I haven't tried using tubes with my Sigma 150mm. I'm sure there's a mathematical formula out there somewhere, but I have no idea where
My advice is to stick to a lens by itself, without tubes, get the focusing part down to pat. Depending upon how steady you are, it might take a week or two, or 3-6 months like it has with myself. Don't expect every shot to be a winner. Once you've got things like sharpness (eyes) down to pat, then concentrate on techniques such as getting the film plane to help maximise the DOF of your subject. Things like composition. Bokeh and backgrounds, etc.
In short, practice, practice, practice. Learn to walk before running. Once you've the basic things like that down to pat, then start experimenting with things like tubes/bellows etc. Don't get too disappointed, it all takes time and practic to start getting great shots (at least from my experience).
Oh, and most of us here do crop our images to get in closer. I have a 1D, 4mp, so cropping is a bit more riskier for myself, those with more modern cameras that have 8mp etc are better to crop with imho. The 1D's issues are banding, a bit noisier than newer models, and slight cropping issues from time to time, so they do sometimes hinder myself. If you've running a Rebel XT or 20D/30D/5D etc etc you shouldn't have any real issues with cropping, just make sure to nail exposure and focus.
Hope this helps.
Dave