Teleconverters are something I hear many people ask about and something that seems not to be properly understood by many. I think everyone hears about this magical accessory that extends your lens by about 40-100%, but their disadvantages are not as well known. Used correctly and within their limitations teleconverters are an excellent to any photographers kit bag. Teleconverters are an accessory that I have used for several years on a number of different lenses. I reply to many forum questions people ask about teleconverters, this has lead me to write 'A Guide to Teleconverters', you can read in the tutorial section here. You can read all of my tutorials here.