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So, I've been scouring the internet looking for cheap alternatives for the Pentax 50-135, and I have came across a few little gems. I've found a sigma 75-200 f3.8 and a fast 135mm lens, but have became fixated on this lens, the Tamron Adaptall-2 AF 28-105 f2.8, which you can read about in this forum (
Tamron Adaptall-2 SP AF 28-105mm f2.8 LD IF Aspherical (176A) Lens Reviews - Tamron Adaptall Lenses - Pentax Lens Review Database). So my question is, after hours of research, I have come up empty handed and am wondering if this lens can possibly even exist? Thanks in advance!