Lower right quarter, just right of the vertical stadia below the reticle tree. Looks like bubbles in the glass. I've had this scope for almost three years now and just now noticed this because I rarely shoot below 12X, power setting in the pic is 5X, scope pointed at an off-white door so the glass bubbles hopefully show up better. Now I've looked through this scope below 12X at least a couple times in the past and never noticed them. Leaves me wondering if this is something that can develop over time or something that was always present and I just wasn't paying attention. Anyways, what are your thoughts, advise, opinions, jokes etc..... Send it in and have the manufacturer look at it (Tangent Theta btw) or just live with it like I have been? This isn't a complaint thread, just a mild concern, this scope has served me well.