Originally posted by Adam MF mirror lenses are practically useless except for moon shots, (but very fun) IMHO. I've got both the 1000mm/11 and the 400-600mm/8-12, neither of which have produced anything reliable compared to regular tele lenses.
If you can get your hands on an AF mirror lens, then you might be in business.
I wholeheartedly disagree. A good mirror lens will be very sharp and can produce excellent images. You just need to be aware of the donaut shaped background blurr and the slightly lower contrast, than a comparable refracting lens.
Bad mirror lenses will produce rubbish images, but the same is true for bad refracting lenses. Good mirror lenses seem to include the Tamron Adaptall modells, the diminutive Tokina 500/8 (I've used that for many years with film) and often those by the camera makers. Very intersting are the solid-cats by Vivitar, if you get one.
But none of these good mirrors (and I did not even mention the two Zeiss Mirrotars) are not that cheap, but compare favouriably pricewise with good refracting lenses.
Usually I would only recommend 500mm mirrors, as the 1000mm mirrors are hard to use without a massive tripod setup. One would need a tripod setup several times as expensive as the lens (the Russion 1000/11 are quite good) to achieve anything useable.
Ben