| Component |
Description |
Photo |
|
| Tube |
The tube is a 50 inch long cylinder that is 10 inches in diameter
with a wall thickness of 0.094 inches. Unfortunantly, it is not
preceisely circular, varying by perhaps an eighth of an inch
in its diameter. Irrigation tubing is not perfect, it comes
scratched and is not as round as would be nice. If anything else
were available, I would use it, but this is the best available to
me. It is made of aluminium. |
 |
|
| Focuser |
The focuser is very nice. It came from JMI (an NGF-DX3),
and is made of black anodized aluminium. The crayford design
is smooth and backlash free. This is an excellent piece and
highly recommended. |
 |
|
| Primary Mirror |
The primary mirror is the heart and soul of any telescope
and here I made no comprimises. I didn't grind my own mirror (or
it's quality would probably be laughable), but rather I contacted
Zambuto Optics. The mirror's quality is as close to perfect
as I could ever need. Additional information is avaliable in this
specification sheet that I
received with the mirror. Coating was done at QSP optical. |
|
|
| Mirror Cell |
Like the telescope tube, I wasn't so sure about this piece.
The mirror cell looks okay, and will probably work perfectly. It
does not use the 3-point flotation design. It rests the mirror
on three cork pads and then holds it in place with rubber-coated
brass clips. I intend to add nylon screws along the edges to
prevent lateral shift of the mirror in the cell and to prevent
the mirror from rubbing against the aluminium frame of the cell.
Also, the bolts that came with the cell were not long enough for a
standard 10" diameter tube. All things considered though, this
cell should work well, and is not as irritating as the imperfect
tube. |
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|
| Secondary Mirror |
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|
| Spider and Diagonal Holder |
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| Dobsonian Mount |
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