I recently purchased some Closeup filters to go with my Nikon D40x. Closeup filters are an inexpensive way of getting good macro pictures of plants, insects etc. The other option is to buy a dedicated macro lens which start from £150. These closeup filters only cost me £12 from Ebay and fit on to your existing lens to produce a similar effect.
A limiting factor in any lens when you try to take macro (closeup) photos is the focusing distance. A 55-200mm telephoto lens is very good at bring distant objects closer and in more detail but they generally have a minimum focus range of 1 metre.
When I apply a closeup filter to my 55-200mm lens it shifts the focusing range so that I’m no longer able to focus on infinity (distance objects) but I am now able to focus much closer than 1 metre. Applying the +1 filter allowed me to focus down to about 20 cm, which is a big difference. Now the set that I bought has a +1 +2 +4 and +10 filter. As you can imagine the higher the number the much stronger the filter will be and the closer you can get to your subject. You can get to the stage where your still focus only 1cm away. But… as with many things, there is a drawback. The drawback with applying a stronger closeup filter is that your depth of field (the amount that is in sharp focus, click here for more information) is limited.
Here are some pictures that I taken in my garden showing how affective a closeup filter is and what results you can get from them.
Enjoy and thanks for reading my article. 
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Well done I see you have the proboscis getting the nectar
They are really cool. I love macro photos