orion shorty with pental xl 7mmPosted By James DellaPenna |
Ralph,
I don't know the focal length of a Burgess 127. If it's an f/10 1200mm you are already at 171x using just the 7mm XL. This puts you near the "practical" limit of power for planetary objects. The Shorty is going to double that to 343x which might be O.K. on star clusters or galaxies under exceptional viewing conditions. On the other hand, if the scope is an f/5 or f/6 it may work O.K.
I don't know the focal length of a Burgess 127. If it's an f/10 1200mm you are already at 171x using just the 7mm XL. This puts you near the "practical" limit of power for planetary objects. The Shorty is going to double that to 343x which might be O.K. on star clusters or galaxies under exceptional viewing conditions. On the other hand, if the scope is an f/5 or f/6 it may work O.K.