Okay, so it seems that many forum members suffer from various forms of GAS (Gear Acquisition Syndrome), some worse than others. The onset of GAS can be gradual in some cases or almost instantaneous in others, but the most common form of GAS is brand-name GAS - in particular brand-name lens GAS. In the process of collecting lenses from OEMs (Original Equipment Manufacturers) like Nikon, Canon, Leica, Olympus, Pentax, etc there appears to be a side effect of acquiring (whether by design or accident - henceforth to be known as accidental GAS or unintentional GAS) lenses from more obscure sources. While it is generally accurate to say that the lenses from the OEMs are superior, there are more than a few lenses from third-party sources that have become legendary themselves and some that may never get a mention but sometimes just plain surprise you by actually being pretty good. So before I waffle on too much, this is an image thread for the lens brands that have been forgotten, or perhaps never known in the first place - the less fortunate, the mongrels, the lenses from the other side of the tracks, the lenses-of-which-we-do-not-speak. Please feel free to add your Vivitar, Sigma, Tamron, Tokina, Soligor, Panagor, Kenlock, Sirius, Spiratone, Cobra, Zykkor, etc photos and give these lenses a voice!