First, let me apologize for generalizing when I coined the term "Lens Lust Disease". After further study, there appears to be two distinctly different diseases related to lenses. Lens Acquisition Disorder The poor souls suffering from LAD are doomed. There is no cure for their compulsion to collect glass. The only possible way to mitigate the destructive effects of their disease (marital problems, bankruptcy) is to divert their direction to older, MF lenses. Lens Lust Disease LLD seems to have its roots in a quest for the ultimate image quality. The victims often sell lenses to fund their next purchase (which clearly dinstinguishes them from the LAD crowd, who wouldn't dream of selling a lens). This swapping practice reminds me of drivers flipping from lane to lane on a highway during rush hour, looking for an advantage. But there isn't a meaningful one to be had. The significant gain is in learning the characteristics of a lens, and getting the most out of it, as Chris101 has demonstrated with his gallery of images from the oft maligned 24-120VR. http://radio.weblogs.com/0101365/stories/2004/09/07/photosTakenWithThe24120vrN.html LLD isn't any more curable than LAD, but it can be put into remission by any new technique or equipment that gets the patient better pics. Since illumination is key to image quality, lighting gear becomes the equivalent of methadone as a treatment for heroin addicts. For example, last weekend I was obsessing about adding the 105/2 DC to my camera bag, but my light tent kit arrived from BH Photo on Tuesday, and my LLD symptoms have completely vanished! The kit consists of a rip nylon light tent, two background sweeps (one black and one white), a pair of adjustable 6 foot light stands, two reflectors, and a couple of 250W photo bulbs... all for less than the cost of a Sigma 70-300 zoom! Here's what it looks like. I bought it for product photography, and it's made my current pay job a cinch. It works equally well for floral macros and closeups. View attachment 12381 And the light stands can be used to mount my pair of slave flashes for hummingbird pics. View attachment 12382 It'll take me weeks to explore this new gear and get back to lusting for that 105/2 DC. Maybe I can pay down my credit card in the interim... or maybe I'll just buy some softboxes for my strobes .