Hi: Right now I have a Maxxum 7, but my 70-300mm lens is a Quantatay (Tech 10 MX AF) and it won't work right. I asked customer support and they said I needed a ROM IC chip? Does anyone know where to get this item, how much it would be and who could install it? Or, should I just buy a new lens---I am definitely an amateur so I truthfully don't need the top of the line. Thanks for any information, Amanda --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.782 / Virus Database: 528 - Release Date: 10/22/2004