That is a bizarre lens. Thanks for all the info Fred! I put on my daughters 3D glasses, and it really does look 3D! I prefer stereo over QDOS. I also now know that I have the 3rd version 70-210. Thanks again Fred, Steve Larson Redondo Beach, California "Everyone has a photographic memory. Some just don't have film."
Fred wrote: > [was: Vivitar Series One 28/1.9 PK for $60?] > > >> there is at least another rare VS1 zoom - the 70-210/2.8-4 QDOS > >> novelty. > > > What`s the deal on this lens, I have a 70-210/2.8-4 (used it > > tonight as a matter of fact), is the QDOS a different beast, or is > > it just hype? I seem to remember one on ebay, was it a 3D claim? > > Well Steve, there are five VS1 70-210 lenses altogether, as far as > I can tell. First, there have been four "regular" VS1 70-210 > lenses: > > 1. The first 70-210/3.5 version, with 67mm filter threads, and with > two obvious "prongs" used to shift into macro mode. > > 2. The second 70-210/3.5 version, with 62mm filter threads. > > 3. The first 70-210/2.8-4 version (and third 70-210 version), with > multiple DOF lines fanning out toward the zoom/focus ring. > > 4. The second 70-210/2.8-4 version (and fourth 70-210 version), > with multiple DOF lines fanning out toward the aperture ring. > > But, then, there is also the QDOS version, which appears to be > identical to #4, except for the additional hardware to provide the > QDOS 3D effect to images (which can be enabled and disabled by > sliding a switch on the barrel near the mount, sort of like the > Manual-Auto switch on some of the newer Takumar screwmount lenses. > > A side view of the lens - > http://www.cetussoft.com/pentax/vqdos/vqdosside.jpg > > A front view of the lens - > http://www.cetussoft.com/pentax/vqdos/vqdosfront.jpg > > The slide switch set for normal lens use - > http://www.cetussoft.com/pentax/vqdos/vqdosnormpos.jpg > > A view from the rear of lens when set for normal use - > http://www.cetussoft.com/pentax/vqdos/vqdosrearn.jpg > > The slide switch set for QDOS use - > http://www.cetussoft.com/pentax/vqdos/vqdosqdospos.jpg > > A view from the rear of lens when set for QDOS use - > http://www.cetussoft.com/pentax/vqdos/vqdosrearq.jpg > > The two manuals supplied with lens (one of which is just the > "regular" (fourth) VS1 70-210 manual) and the front and back of the > cardboard-framed viewing glasses also supplied (not shown are the > plastic QDOS "sunglasses style" viewing glasses and the plastic QDOS > "clip-on style" viewing glasses also provided) - > http://www.cetussoft.com/pentax/vqdos/vqdospaper.jpg > > A photo taken using the QDOS setting (which won't make a whole lot > of sense when viewed without a clear piece of red glass or plastic > in front of your left eye and a clear piece of blue glass or plastic > in front of your right eye) - > http://www.cetussoft.com/pentax/vqdos/vqdos01.jpg > > Weird, eh? Just like ol' 3D comic books - <g>. > > Fred >
