I usually use Optec autofocuser motors for my scopes. This time (probably by mistake) I bought a Pegasus Focus cube 3 to place on my AskarFRA300 for traveling trips. I already have one problem as there is a significant gap between the L-bracket extension and the base of the telescope. I am clearly doing something wrong. There is no way to
Any suggestions?
Bruce
📷 IMG_4498.jpeg
Loosen the screws and it will fall down into place. It’s a rail-type system, meaning the adjustments are variable (they slide up and down into any position).
If the focus cube is in the way (preventing the sliding of the bracket), remove it and install the brackets first. Then install the cube to the brackets.
Bruce,
This may sound like a silly question but did you consult the manual? I found it comprehensive, covers the installation quite well and offers advice how to prevent damage to the motors.
From what I see on your image, there is enough leeway to slide the L-bracket closer to the base of the telescope.
Warm regards,
Yanko
Looking at it again, you don’t need to remove the Cube. Just loosen the four screws going into the cube and let the entire bracket(s) slide down.
Tommy Mastro · Mar 14, 2026, 06:25 PM
Loosen the screws and it will fall down into place. It’s a rail-type system, meaning the adjustments are variable (they slide up and down into any position).
If the focus cube is in the way (preventing the sliding of the bracket), remove it and install the brackets first. Then install the cube to the brackets.
I tried adjusting ti and also removing the cube and installing the bracket first- which I can. However, it is then impossible to attach the cube to the other part of the bracket because the screw heads prevent it from making a flush connection.
lunohodov · Mar 14, 2026, 06:28 PM
Bruce,
This may sound like a silly question but did you consult the manual? I found it comprehensive and covers the installation quite well and offers advice how to prevent damage to the motors.
From what I see on your image, there is enough leeway to slide the L-bracket closer to the base of the telescope.
Warm regards,
Yanko
Yes- I did.
Bruce Donzanti · Mar 14, 2026, 06:38 PM
I tried adjusting ti and also removing the cube and installing the bracket first- which I can. However, it is then impossible to attach the cube to the other part of the bracket because the screw heads prevent it from making a flush connection.
You have the brackets upside down. Flip them over. The screw heads should lye inside the recess on the bracket.
You’ll notice when you look carefully, one side of the bracket has a recess rail (a grove for the screw head to sit inside of it. While the other side does not have this recess.
Tommy Mastro · Mar 14, 2026, 06:41 PM
Bruce Donzanti · Mar 14, 2026, 06:38 PM
I tried adjusting ti and also removing the cube and installing the bracket first- which I can. However, it is then impossible to attach the cube to the other part of the bracket because the screw heads prevent it from making a flush connection.
You have the brackets upside down. Flip them over. The screw heads should lye inside the recess on the bracket.
Tommy Mastro · Mar 14, 2026, 06:43 PM
You’ll notice when you look carefully, one side of the bracket has a recess rail (a grove for the screw head to sit inside of it. While the other side does not have this recess.
My brain is what is upside down! Thank you very much- got it to work!
Glad to help. I only knew because I mounted one last night and started to do the same thing, then realized it had to go the other way.