Edited by betacygni, 23 November 2019 - 12:17 AM.
Need of collimation?
Posted 22 November 2019 - 11:56 PM
Posted 23 November 2019 - 08:50 AM
As the focal length of the eyepieces get shorter, collimation error can be easier to see. Now the common wisdom is that for binowiewers, it is better to get magnification by using amplifiers ahead of the binoviewer than after it, and while there are other good reasons for this, the issue you are dealing with is one of the main reason.
The only way you would know if Televue thinks that the behavior is out of their design spec would be to ask them, and that is what I would do.
Posted 23 November 2019 - 09:03 AM
To check collimation I use the Lunar test as outlined in Post #2.
Before sending therm in for service, make sure the Zoom eyepieces are flush to the BV with no tilt.
Second, check that the 4 screws holding the eyepiece collets to the BV aren't loose.
Finally, there are tiny set screws on the side of the collets that hold the upper part (that turns to tighten/loosen) to the lower part of the collet that is fixed to the BV via the 4 screws mentioned above. Check these also.
If you're really eager to have it fixed and confident in your abilities, here's how you can do it yourself.
Posted 23 November 2019 - 04:26 PM