Tele Vue / Meade laser test: question

[cyber3d]

Hi newbe here.

Can someone confirm an experiment I just made on a Meade 2x telextener (tele extender) and a Tele Vue 4x Powermate?

I placed a laser collimator into the barlow and observed a nicely formed laser point exiting the lens. Then I placed the same laser collimator into the Tele Vue 4x Powermate and the laser point was totally elongated revealing almost 3 distinct points in a straight line (fairly close together but most definitely elongated).

[Chronos]

I assume you are fining tuning your collimation
See: http://www.cameraconcepts.com/barlowed%20laser%20collimation.pdf

[chemisttree]

Confirm what? That you were experimenting with barlows?

Anyway, do you think you might see miscollimation more easily with a 4X or a 2X barlow? What do you think is the source of your miscollimation? Have you tried rotating the laser in the fixture?

[cyber3d]

Actually no.
I just got the powermate but noticed my eye was really getting tired compared to the Barlow. The power difference could not account for that, right?

So, as an experiment, I inserted the laser into each and observed the output against a clean wall. I was surprised to see how distorted the beam was with the powermate. Could the optics be out of wack?

I was hoping someone could try it on their powermate.

Victor

[cyber3d]

I was just curious. I did rotate the laser and it is definitely the powermate and not the laser.

I'm not saying this is a scientific bench test. I'm just curious if others see the same results.

Victor

[Chronos]

That was my suspicion, just didnt want to ruin the fun exploring options. It's all about learning.