I've been hearing a lot about how older lenses from 60's and 70's can have an affect on the look of the image. Whenever someone is asking for advice on how to get some sort of a retro look, people among other things mention old lenses. My oldest camera is an old 70's practica SLR, and I've made a lot of pictures with it, but I have never had a chance to compare it with my newer cameras from 90's, because it has been broken for some time. Besides the different flare type, I really don't know what I should be looking for when trying to indentify a signiture look of such old lenses. So does anyone have an example photo when such features are clearly visible, or better yet a side by side comparison with new lenses. If not, I would appretiante if you could tell me in words, what kind of effect do old lenses have on images?