Hey Trevor, You did not say which lenses you intend to use them on. For the 300 3.8, 400 2.8, they work great. If you intend to use them on a f4 or 5.6 zoom, don't bother. Yes you get more folcal length, but rarely will it be nice and sharp. The Kenko products are OK but again, you get what you pay for. My suggestion is to rent the kit you want first and see if you like what you see and then decide. Les -----Original Message----- Foto/SFX, San Jose, CA 408-835-1184 http://www.aviationphotographers.org/, http://www.fencecheck.com http://www.myspace.com/fotosfx, http://www.portfolios.com/profile.ht...=14627.baldwin |