by dave.b » Tue Sep 16, 2014 5:58 pm
If the "old pair zies Jena" are very cheap then it might be worth starring with them. Otherwise, go for the ones designed for night time use as they should be better collimated and have better coatings on the optical surfaces. Watch out for marketing weasle words, such as "coated optics" does not imply "fully coated optics", which means both sides of the lenses and prisms.
BTW, I strongly suggest you get a metal tripod mounting bracket, as hand held viewing is both hard work and unsatisfactory.
Saved B.