[D700guy]

Hi. I have used a 500mm mirror lens before on a film camera, so am familiar with some of the limitations of such lenses, but never fully tried it out due to cost of film etc..

My question is, in the digital world, is a mirror lens still useful / worth buying for grabbing quite far away distances? Certainly can't afford £5000 for a Nikon prime 500mm, and would be considerably smaller which is useful when going on holiday. Is a x2 adaptor worth bothering with to get double everything (1000mm f16)?

The camera I use is Nikon D700, so it should be capable of good images, but also show weaknesses of a lens.