500mm Lens

http://cgi.ebay.co.uk/Paragon-500mm-Telephoto-lens-M42_W0QQitemZ290290912199QQcmdZViewItemQQptZUK_CamerasPhoto_CameraAccessories_CameraLensesFilters_JN?hash=item290290912199&_trksid=p3286.c0.m14&_trkparms=72:1690|66:2|65:12|39:1|240:1318

I already hit a fivesome cardinal millimetre Centon mirror lens, but as this uses an M42 mount, I could confiscate a 2X photo convertor and would hit a 1000mm lens, which is what I rattling want. Would that be worth it?

What is the primary features most having a 500m mirror lense as to a 500mm connatural ascent lens?

It is a Ricoh lens. On the exclusive it says “Rikenon Mirror Lens 1:8 f = 500mm 10245.” I conceive it has a separate on the modify that says Hoya 77mm. It’s most 9 1/2″ long. Does anyone hit some aggregation most this lense or the value/cost of it. Here’s a picture:
http://img369.imageshack.us/my.php?image=img6093od5.jpg
Thanks!

500mm Mirror Lens on EOS 5D MkII. Had to hit it and essay it. Didn’t wait much, but its actually ok, more than ok for Video, and exclusive 160 USD. Of instruction you requirement a tripod more pricey than the lens, and a stabilize assistance for focusing. Some scenes from Bali. For those who don’t hit the pick of purchase 36 Rokinons or digit Canon 500L. The footage looks rattling beatific in 1080p.. … eos mkII mk2 rokinon 500mm lense effort bali indonesia canon