Further to the "donut bokeh" concern, here's a brief discussion of it, along with an image illustrating same:
frank theriault wrote: > Hi, Marnie, > > One thing that I don't think has been mentioned about mirror lenses, is that the >bokeh tends to look like little round donuts, due (I suppose) to the little round >mirror (or whatever it > is) on or near the front element of the lens. I assume it's that mirror that sort >of "folds the light" back into the lens (note the very imprecise technical language >here), thus allowing > the lens to be compact and light compared to a "normal" lens of that focal length. > > You might want to search the 'net for some images taken with a mirror lens, to see >if that "donut" bokeh bothers you before you buy one. Or maybe someone here has some >images they could > send you or post a link to. > > cheers, > frank > > [EMAIL PROTECTED] wrote: > > > Not sure if a reflex lens is the same as a mirror lens. > > > > They have one going on ebay right now, a Pentax 1000. Aperture is controlled by >neutral density filters. > > > > I've been noticing in my ebay searching that if one wants a lens that is 500+ or >higher one has to get a mirror or reflex lens. And they all say the aperture is >controlled by filters. > > > > Seems weird. But if one wants to get really close closeup wild life shots I can >see the need. > > > > Not in the market for one now, btw. > > > > But I am guessing that with a long, long lens that one can't have an aperture ring. > > > > Anyway, how does a reflex lens work? Gap in my knowledge. > > > > Doe aka Marnie > > -- > "The optimist thinks this is the best of all possible worlds. The pessimist fears it >is true." -J. Robert > Oppenheimer -- "The optimist thinks this is the best of all possible worlds. The pessimist fears it is true." -J. Robert Oppenheimer
