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Hubble Optics Ultra Light UL 16
Dobsonian
REV: 1.1.5 02-12-2013
Please read these instructions thoroughly before beginning assembly
and subsequent use of the telescope.
1.Unpacking .................................................................................................................. 2
2. Assembly ................................................................................................................... 7
2.1 Install the Secondary Mirror ................................................................................ 8
2.1.1 Install the Secondary to the diagonal holder ................................................. 8
2.1.2 Install the Secondary Mirror Cage ................................................................ 9
2.2 Assembly of the Dobsonian Rocker ................................................................... 14
2.3 Assembly of the Mirror Box .............................................................................. 14
2.3.1 Installation of the Pads and Brass Wires .................................................... 15
2.3.2. Installation of the Lower ALT Bearing Sections ...................................... 16
2.4 Install The Truss Tubes and Secondary Cage .................................................... 22
2.4.1 Installation of the Truss Tubes .................................................................... 22
2.4.2 Installation of the Secondary Mirror Cage .................................................. 24
2.4.3 Installation of the Optional Finder Scope .................................................... 26
2.5 Adjust the Sling .................................................................................................. 27
3. Collimate the Optics. .............................................................................................. 28
4. Care and Maintenance ........................................................................................... 31
4.1 Mirror Storage .................................................................................................... 31
4.2 Mirror Cleaning .................................................................................................. 32
5. Specifications .......................................................................................................... 33
6. Limited Warranty .................................................................................................. 34
7. Technical Support .................................................................................................. 34
WARNING: Never look at the sun with your telescope without a
professionally made solar filter. Permanent eye damage or blindness
could result. Eye damage is often painless, so there is no warning until
it is too late. Children should not be allowed to handle the telescope.
Avoid using the type of solar filter that screws into an eyepiece. They
are susceptible to cracking under the intense heat that builds up near
the focus point, and could cause severe retinal damage. Use only the
type of solar filter that covers the front of the telescope. Also, be sure to
leave the cover caps on the finder scope when solar observing. Better
yet, remove the finder scope altogether when viewing the sun.
instruction manual
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Summary of Contents for Hubble Optics Ultra Light UL 16
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Page 1: Table Of Contents
Hubble Optics Ultra Light UL 16 Dobsonian instruction manual REV: 1.1.5 02-12-2013 Please read these instructions thoroughly before beginning assembly and subsequent use of the telescope. 1.Unpacking ........................2 2. Assembly ........................7 2.1 Install the Secondary Mirror ................8 2.1.1 Install the Secondary to the diagonal holder .......... -
Page 2: Unpacking
Make sure all the parts in the Parts List are present. Be sure to check all boxes carefully, as some parts are very small. If anything appears to be missing or broken, immediately email Hubble Optics for assistance. Box #1, The UL16 main structure... - Page 3 Figure 1: Mirror Box Figure 2:Upper Ring...
- Page 4 Figure 3: Spider Vanes...
- Page 5 Figure 4: Secondary Spider Hub/ Diagonal Support Figure 5: Focuser L Bracket Figure 6: 14 Knob Screws...
- Page 6 Box #2: The primary mirror Qty. Description Primary Mirror...
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Page 7: Assembly
Box #3: Truss Tubes Qty. Description Truss Tubes 2. Assembly Now that you have unpacked the boxes and familiarized yourself with all of the parts in front of you, it’s time to begin assembly. You’ll need a regular screwdriver, a Phillips screwdriver, a set of metric hex keys (1.5,2,2.5,3, 4, and 5mm), two 6-inch (150mm or smaller) adjustable crescent wrenches, and a scissor. -
Page 8: Install The Secondary Mirror
2.1 Install the Secondary Mirror 2.1.1 Install the Secondary to the diagonal holder The Secondary baffle is made of the thin aluminum, please handle the mirror and the baffle with care! First, remove the 5 small side screws holding the secondary baffle. Open the baffle slightly, and carefully slide the secondary mirror into the baffle from the back;... -
Page 9: Install The Secondary Mirror Cage
2.1.2 Install the Secondary Mirror Cage Please note that most screws needed for the installation are already installed on the parts for easy identification. You do not need to have the scope completely set up to carry out this step of assembly. - Page 10 Figure 8:Attach the three spider wings to the spider hub Figure 9: Attach the three spider wings to the upper ring...
- Page 11 Figure 10: Attach the focuser L bracket to the upper ring Figure 11: Attach the focuser to the L bracket...
- Page 12 Figure 12: 3 collimation screws evenly between the vanes Figure 13: Attach the secondary holder with the secondary mirror...
- Page 13 Figure 14: Center the secondary in the focuser drawtube...
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Page 14: Assembly Of The Dobsonian Rocker
2.2 Assembly of the Dobsonian Rocker The UL16 base is shipped assembled. The only thing you need to do is to install the three plastic feet. Make sure to use the wing nuts to lock the three feets. 2.3 Assembly of the Mirror Box... -
Page 15: Installation Of The Pads And Brass Wires
The primary mirror is shipped in its own box to prevent possible damage. Once the primary mirror is installed in the mirror box, there will be no need to remove it until cleaning is necessary. However, for shipping and long-term storage, the primary mirror should be packed tightly in its original packing. -
Page 16: Installation Of The Lower Alt Bearing Sections
Insert the brass wires into the small holes on the support bars, and then bend the head portions to lock the brass wires in the position. Push the brass wires outward into a slight curve to keep the support bars in position. 2.3.2. - Page 17 First make sure that 3 collimation knobs and 3 locking screws are installed, then rest the Mirror Box on its side: Place the two spacers around the ALT bearing installation holes. (Please note that the spacers are already installed).
- Page 18 Then turn around the mirror box to rest it on another side to install another lower ALT bearing section. 2.3.3. Installation of The Upper Lower ALT Bearing Section Place the mirror box onto the Rocker box. Then install and bolt the ALT upper bearings sections one at time to the lower section. Then bolt the two cross tubes to the upper bearing sections.
- Page 19 Figure 15: Tighten the knob screw and pivot screw The mirror box can be stored and transported folded in the following way: 2.3.4 Installation of the Primary Mirror Rotate the two eccentric side pins to make room for the primary mirror. Loosen the locknuts on the top of the mirror clips and turn them aside.
- Page 20 Use a flat head screwdriver to open the split bolts, and insert the sling into the slot. Also loosen the nuts on the two split bolts that hold the sling. Stretch the sling loosely around the two lower side pins. Figure 16: Open the slot Figure 17:Insert the sling...
- Page 21 Figure 18: Lock the mirror box to the rocker with nylon strips Make sure the mirror box is locked with nylon strips to the rocker. Also make sure that the three mirror support bars are evenly placed in the cell. Pick up the mirror and place it into the mirror cell.
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Page 22: Install The Truss Tubes And Secondary Cage
2.4 Install The Truss Tubes and Secondary Cage 2.4.1 Installation of the Truss Tubes The truss tube ends have an asymmetric shape, so they can be connected in the following way to avoid interference with each other. • Make sure that the primary mirror is fully protected with a mirror box cover, which can be as simple as a square cut out of cardboard. - Page 23 Figure 19:Tighten the knob screws...
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Page 24: Installation Of The Secondary Mirror Cage
2.4.2 Installation of the Secondary Mirror Cage Here is the installation procedure: • Make sure that the primary mirror is fully protected with a mirror box cover, which can be as simple as a square cut out of cardboard. • Loosen the wing nuts on all the knob screw as much as possible, but make sure they are still fully engaged on the bolts. - Page 25 Figure 20:Slide in one slot first...
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Page 26: Installation Of The Optional Finder Scope
Figure 21:Then slide in one adjacent slot Figure 22:The slide in other two slots at the same time 2.4.3 Installation of the Optional Finder Scope Use 2 provided (hexagon or cross) socket sunk head screws to mount the finder scope using two of the four finder mounting holes. -
Page 27: Adjust The Sling
2.5 Adjust the Sling After UL16 is fully assembled, the sling must be adjusted. -
Page 28: Collimate The Optics
The primary mirror must be supported in the sling and not by the side pins. Point UL16 about 15º above the horizon, an angle from which your can comfortably reach and adjust the collimation screws. You will need to use two wrenches to adjust the sling. Make sure that the sling is hung through the slot on the left (or right) split bolt. - Page 29 Use a simple collimation cap (or sight tube) for this step. Insert the cap into the focuser, and look through the peephole of the sight tube at the secondary mirror. If you do not have a collimation cap or sight tube, then simply eyeball it from a distance away from the center of drawtube.
- Page 30 Figure 23:The primary mirror is not yet collimated. Figure 24:The primary mirror is collimated by laser collimator.
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Page 31: Care And Maintenance
Step 4: Star-Testing Your Collimation You should always use an artificial star or a real star to verify the collimation of your scope. When collimating UL16 in the horizontal position, you should mount the focuser right on top of the truss tubes! The UL16 is well-engineered to hold its collimation across all positions when the focuser is mounted at this position. -
Page 32: Mirror Cleaning
might be OK, but is not recommended. We highly recommended storing the secondary cage and the mirror box in our optional waterproof Nylon storage bag. Although big enough, do not store the rocker/ground board with the mirrors in the bag for a long time;... -
Page 33: Specifications
Then use a cotton ball, starting at one edge, swab the mirror in one direction, applying no pressure beyond the weight of the cotton itself. Grit is less abrasive wet than dry, so do this step under water if you can. Don't let the surface dry. Turn the cotton over in a backward-rolling motion as you go, so that as soon as a part of it rubs the surface, that part is carried up and away from the glass. -
Page 34: Limited Warranty
7. Technical Support Hubble Optics (Optel Engineering Group Inc.) will provide the support for the basic operations outlined in this document by email. You will receive a response, generally...
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