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Customers most agreed on the following attributes:
from Seattle on 12/26/2011
Comments about Blue Fireball Blue Fireball 2" Eyepiece Extension Tube with 35, 50, or 80mm Extension:
I use both the 35 and 50mm extension tubes with my refractors which are very useful when using EPs that require substantial backfocus (eg Vixen LVWs). Using the extensions provides the ability to focus on very close-up terrestrial targets that would otherwise be too close to obtain focus without the extension. And having the brass compression ring puts them in with higher end ewuipment.
from Iowa on 12/26/2011
Comments about Blue Fireball Blue Fireball 2" Eyepiece Extension Tube with 35, 50, or 80mm Extension:
This tube has two set screws that tighten down against the brass compression ring inside which gives added security to your eyepiece or diagonal. I only wish it had a rubber grip strip,then it would be perfect!
from Clarksburg, NJ on 12/19/2011
Comments about Blue Fireball Blue Fireball 2" Eyepiece Extension Tube with 35, 50, or 80mm Extension:
This is a beautifully machined piece of hardware. The no mar eyepiece holding, and the quality of finish make this a great value. The 35mm was just the ticket,for making my Meade 56mm parfocal with the Celestron Ultima LX series.
from Uvalde, Texas on 11/7/2011
Comments about Blue Fireball Blue Fireball 2" Eyepiece Extension Tube with 35, 50, or 80mm Extension:
Great product just remember that additional in-focusing path is required
from Roermond, NL on 11/6/2011
Comments about Blue Fireball Blue Fireball 2" Eyepiece Extension Tube with 35, 50, or 80mm Extension:
Easy to use, straight forward and good length for getting scope into focus.