Originally posted by KxBlaze I was talking about the latter. I was interested in something that would increase my "macro" capabilities. But I am also curious about a teleconverter that can 2-5x the zoom on a lens so........
Does anyone have experience with using a teleconverter? If so, what was the strength used and how does this affect image quality or how does this affect the over all usage of the lens the converter is attached to?
there are a lot of forum members that have used close up lenses with good results.
they usually come in kits of 3 lenses with varrying diopters +1,+2 and +4 are the most common 3.
the way they work is as follows:
a diopter is 1/focal length (in meters), therefore a 2 diopter lens has a focal length of 500mm and the 4 diopter lens has a focal length of 250mm. 1 diopter is obviously 1000mm or `1 meter
when you attach one of these to the front of the lens, it changes the maximum focusing distance to the focal length of the close up lens,
therefore a 1 diopter lens reduces the infinity focus point ot 1 meter, the 2 diopter to 1/2 meter and the 4 diopter lens to 1/4 meter. since image isze is a function of the ratio of lens to sensor / subject to lens , the closer you get the bigger the image. Its that simple.
Note there are also some very expensive multi element close up lenses, but the low cost set gets reasonable results to let you see if you want to get further into macro