Altair Astro Lightwave 66-how to mount red dot finder

[uk_friendly_fire]

Just purchased a S/h scope OTA - can't find any screw mount for a finder red dot/scope on tube. 

How does it mount?

Also is there such a thing as a user/service manual for this OTA as the rotating focus has a couple of rough points on rotating?

Thanks in advance

[RobertI]

Might be worth posting a picture of the scope?

[uk_friendly_fire]

51 minutes ago, RobertI said:

Might be worth posting a picture of the scope?

 

[RobertI]

Looks like it’s the single bolt just ahead of the OTA - nicely demonstrated in the following review of the scope. HTH.

 

 

Edited February 10 by RobertI

[RobertI]

2 hours ago, uk_friendly_fire said:

Also is there such a thing as a user/service manual for this OTA as the rotating focus has a couple of rough points on rotating?

Do you mean the focus knobs or the rotating focus assembly (which allows the orientation of the camera/eyepiece to be changed)?. If the latter then, the friction can be adjusted by loosening/tightening the three grub screws. I also found a very light greasing of the threads also worked wonders to smooth the action. I’m afraid I can’t help regarding the focuser. 

[uk_friendly_fire]

8 hours ago, RobertI said:

Do you mean the focus knobs or the rotating focus assembly

It's the latter. How should the three adjustment screws be set? Is it just trial and error?

[uk_friendly_fire]

Thanks Robertl you answered both my posts with the video.

[John]

I have a similar arrangement on my Altair 70mm Starwave. There has been a little trial and error getting the tension of the 3 recessed screws right. I want to be able to rotate the focuser reasonably smoothly when the larger screw is loosened but don't want it to sag. Some times rough spots are created if one or more of the screws are overtightened at some point and dig pits into the flange that they bear against.

 

[uk_friendly_fire]

There seems to be a washer maybe a teflon washer sandwiched between the rotating parts do you know of a source for these parts?