Pentax Rear Converter-A 2X-S  type_Adapters and 250mm lenses

and 250mm lenses

One of Nikon's best manual focus bodies

A well made tripod that will almost certainly last longer than the social acceptability of referring to an inanimate object of commerce as a "Sherpa

good shutter speeds

the D700: worth a look

Pentax Rear Converter-A 2X-S &nbsptype_Adapters and 250mm lensesThe Pentax Rear Converter A 2X S is a 2x teleconverter compatible with most Pentax K mount lenses. Pentax says it's not compatible with its 15mm f3. 5 lenses or the 24 35mm f3. 5 zoom, and there may be a few others out there, too, so check your lens instruction manual to be sure. In excellent condition, with clean glass and only minor cosmetic wear.