Rudi,
Sorry for the late post and thanks for the extension tube suggestion. I loved Roger C.'s tulip taken with the 500D so much I didn't even click on the tube option.
Eland, I simply searched B&H and, not finding the 500D in 67mm, just assumed it must be an "off" size. Being new to photography (30 years snapshot hero, one year serious), I find I learn every time I post. This is sooo great! Thanks for the common thread size list, it is now in my permanent folder.
Rudi, in regard to the 70-200mm f4 lens. I bought it with the D30 from Canoga but never used it much. I was shocked to discover a 4.98 rating @ photographyreview.com and a 4.1 rating @ photodo.com and decided I needed to dig this thing out of the bag and see what all the excitement was about.
On the D30 the 70mm is really 112mm on the short end so it really has a special application launch window for my needs. I photographed a 4x4 rock crawling championship this last weekend and forced myself to use the 70-200 as much as possible to answer both our questions. Many shots were "crop challenged" with only 30 feet distance_to_subject but the quality was fantastic. I found that by using a lens that 1.) is classified as L and 2.) is rated so high across the board, I shot with a lot of confidence and expectation. Confidence must be an important part of my need because, instead of the usual 10 to 20 percent "keeper" ratio I have come to expect, I came away with more "great" images of the same subjects than I know what to do with. The 70-200 just keeps cranking the same consistency shot after shot.
I am terrible at hand held shots as I tend to move away from the subject as I press the button. I shoot a gun the same way and can't believe I survived Vietnam!8)
(They gave me a BIG gun that shot VERY fast to compensate.) The 70-200 is a lot like this. I shot TV @ 500 just in case and most 200mm shots came out great.
In summary, now that I have used this lens, it is the best value for the price in this range. I will never part with it. I only wish I had a Canon film body to try some slides as I understand this is where it really shines.