AZ3 and 90 f10 102 f10
Posted 25 December 2013 - 10:25 AM
Posted 26 December 2013 - 06:32 AM
However in order to limit the vibrations I have to keep the Porta's leg fully retracted and so the long refractor become quite awkward to use.
If you want use the refractor on Planets or double star (a 100mm refractor can provide 160x with ease) I think the upgrade to a SkyTee, or EazyTouch, or Giro would be a worthy investment.
I have a SkyTee and it weights about 10 kg, so it is reasonably transportable while being sturdy enough for a 1 meter long refractor (actually it is my first choice for the 100mm refractor..great scopes means great burden ).
The Giros are much lighter but cost more (you will need also a strong photo tripod).
If you want to minimize the weight maybe you could also look at Skywatcher Maksutov (they are not refractors but, well, they perform in a very refractor-like way).
Posted 26 December 2013 - 08:10 AM
Posted 26 December 2013 - 08:34 AM
The 5mm Planetary is a very good EP, but if you do not have a 6mm maybe I will start from this (if you do not mind about narrow aFOV, a 6mm Plossl or Baader CLassic could be a good choice. Beware of the very low eye relief such EPs have...).
The Skywatcher Maks require not maintenance at all (the Gregorian Maksutov is the most "refractorish" of all the reflector, and its need for collimation check is almost theoretical...not more than that of a refractor, which could lose its collimation too).
Anyway I am too a "refractor guy" and a 100/1000 is a great telescope, and a huge improvement over a 70/500 on planets (while the latter could be a good rich field refractor and for sweep the Milky Way under a very dark sky).
If you are a "do it yourself man" a good idea is to improve the Porta tripod, which is the weak point of a very good light altaz mount.
Posted 26 December 2013 - 04:04 PM
Posted 26 December 2013 - 04:49 PM
If you plan to use the Porta on a concrete surface a good idea is put some rubber pad under its feet.
Posted 27 December 2013 - 04:47 AM