Hey All, Have a few questions about some of the lenses that I have. One is a JCPenny 80-200 3.9, one is an Auto Vivitar telephoto 135 2.8 and the other is a Tokina SZ-X 35-70 3.5-4.6. On the JCPenny (larger one), there is a red arc with an R next to it. It gets wider (only to the right) as the zoom goes in (80 is larger than 200). The ft measurements are also in red, but not sure if it is related. The arc goes towards the top of the picture. Sorry for the fading, these are OOC jpegs, and it is very sunny right now. On the Vivitar, the aperture dial turns two ways. They both start at 2.8, but one has a setting for 4, then has 5.6 in orange. The other way has 2.8 (but smaller), and then 5.6 is the next step. From 8-22, they perform the same on either side. On the Tokina, there are two aperture dials, right on top of each other. They rotate together (not preset), and there is a smaller marking to the right of it. I think this is so you can tell the aperture when zoomed in (but the bottom row isn't offset at all). If so, I would think that the bottom row would start at 4.6 and go up from there, so I can tell at each end of the zoom. On the focus rail, there is a white line, as well as two red lines that are marked 35 and 70. When I have it set on 35 or 70, does it measure off the red line or the white? If the red, when exactly do I use the white (guessing around 55-60mm, as that is the smallest it gets).