I have an old (20 years) russian MTO-500, F100-300 and an old 500mm Beroflex. The F100-300 is the best (it has some CA which can be removed with adobe raw). The beroflex is not that bad and very cheap, price/performance maybe unbeatable :) my old MTO is the worst. It's not very sharp and the bokeh is like any other mirror (rings). Focusing is very difficult. The more recent 500 and 1000 should be better.
On 2/6/06, Godfrey DiGiorgi <[EMAIL PROTECTED]> wrote: > Most of the shorter, inexpensive lenses in this class aren't worth > the money. Some of the Russian 500 and 1000mm lenses are good deals, > but I haven't kept up with them enough to know which. > > I'd say that even the much-maligned Pentax F100-300/4.5-5.6 that I > bought for less than $85 used would be a better performer. Stop it > down two-three stops and it returns a surprisingly nice image, even > with a 2x teleconverter, eg:
