Saxon Mini Dob User manual

Instruction Manual

Sections Page
Setting up your Saxon Mini Dob 2
Caring for and cleaning your
telescope 4
Saxon Mini Dob Accessory Pack 5
Saxon Mini Dob features 1
Operating your Saxon Mini Dob 2
Saxon Mini Dob Specifications 5
WARNING!
• Do not use the telescope to look at the sun without an appropriate solar filter. Looking at or
near the sun can result in irreversible eye damage.
• Do not use your telescope to project an image of the sun onto any surface. The internal
heat build-up from the projection can damage the telescope and any accessories attached
to it.
• Your telescope is a precision optical instrument and should be handled with care at
alltimes.
• Make sure no screws are loose before using your telescope.
• Do not drop or shake your telescope as such impacts may damage or misalign the optics in
your instrument.
• Children should always have adult supervision when using the telescope.

SAXON MINI DOB INSTRUCTION MANUAL | 1
Saxon Mini Dob features
Eyepiece
Focusing wheel
Base
Optical tube
Focuser
Secondary
(Diagonal) Mirror –
inside
Arm
Lock nut
Tube end
Primary Mirror –
inside

2 | SAXON MINI DOB INSTRUCTION MANUAL
Setting up your Saxon Mini Dob
1. Remove the telescope and accessories from the box.
Set the assembled telescope and base on a stable surface.
2. Locate the eyepiece. Loosen the eyepiece lock screws and slide
the chrome barrel of the eyepiece into the focus tube. Tighten the
screws to hold the eyepiece in place.
3. Remove the dust cap on the optical tube before viewing.
Operating your Saxon Mini Dob
Positioning your telescope
You can position your telescope to your desired angle by moving the
optical tube up and down in altitude, or by swiveling the telescope
around the base inazimuth.
To do so:
1. Make sure that the Lock Nut is loosen by turning it counter-
clockwise and holding the Tube End.
2. Adjust the optical tube to point towards your desired object by
moving the Tube End.
3. Tighten the Lock Nut to ensure the telescope stays in position.
It may be necessary to readjust the Lock Nut when accessories are
added to, or removed from the optical tube.

SAXON MINI DOB INSTRUCTION MANUAL | 3
Focusing your telescope
To focus your telescope, simply turn the Focus Knob located directly
below the eyepiece until the image in the eyepiece is sharp.
To focus on an object that is:
1. Further than the you one you are currently observing – Turn the
Focus Knobclockwise
2. Closer than the one you are currently observing – Turn the Focus
Knob counter-clockwise
Ensure that the Focus Knob is not handled roughly as this may result in
the focusing mechanism being damaged.
Calculating Magnification
The magnification produced by a telescope is determined by the
focal length of the eyepiece that is used with it. You can change the
power of the telescope just by changing the eyepiece. To find out the
magnification of your telescope, simply divide the focal length of the
telescope by the focal length of the eyepiece you are going to use. For
example, a 10mm focal length eyepiece will give 30x magnification with
a 300mm focal length telescope:
Magnification = Focal length of the telescope =300mm = 30x
Focal length of the eyepiece 10mm
The Saxon Mini Dob comes with two eyepieces of 20mm and 4mm,
giving you a usable magnification range of 15x and 75x.
Calculating the Field of View
The size of the view seen through your telescope is called the true
(or actual) field of view (FOV). This is determined by the design of
the eyepiece. Determining the FOV is important to estimate the size
of objects you are observing. To calculate the FOV, simply divide the
apparent field of the eyepiece by the magnification. Using the figures in
the previous magnification as an example, if your 10mm eyepiece has
an apparent field of view of 25°, then the true field of view is 0.83° or 49
arc-minutes:
True FOV = Apparent field of view =25° = 0.83°
Magnification 30x

4 | SAXON MINI DOB INSTRUCTION MANUAL
Caring for and cleaning your telescope
To ensure your telescope performs at its best, regular maintenance of
your telescope is recommended.
Remember to replace the dust cap over the end of the telescope
whenever it is not in use. This will prevent dust from settling on the
mirror or lens surface.
You must take care when cleaning the mirror or lens surface, and to
only do so with the appropriate cleaning tools. We recommend using a
combination of the following:
• A soft brush made from camel hair
• A can of pressurized air to remove dust
• Optical cleaning solution and a soft cloth
• Special lens paper
If dust has built up on the optics, remove it with a brush or a
can or pressurized air. Spray at an angle to the glass surface for
approximately two to four seconds. Then, use an optical cleaning
solution and a soft cloth to remove any remaining debris. Low pressure
strokes should go from the center of the lens or mirror to the outer
portion. Ensure that you do not rub in circles.
You can use a commercially made lens cleaner or mix your own.
A good cleaning solution is isopropyl alcohol (60%) mixed with distilled
water (40%).
Clean the eyepieces with the special lens paper. Handle the eyepieces
with care and avoid touching the optical surface.
You may experience dew build-up on the optics of your telescope
during an observing session. You must remove the dew to continue
observing. You can do so by using a hair dryer on low setting or by
pointing the telescope downwards until the dew evaporates.
If moisture condenses on the inside of the optics, remove the
accessories from the telescope. Place the telescope in a dust-free
environment and point it downwards. This will remove the moisture
from the telescope tube.

SAXON MINI DOB INSTRUCTION MANUAL | 5
Saxon Mini Dob Accessory Pack
The Saxon Mini Dob Accessory Pack expands the capabilities of your
Min Dob to enhance the views of your desired land and/or sky objects.
The carry bag provided in the accessory pack makes it easy to carry the
Saxon Mini Dob on your travels!
The Accessory Pack includes:
• 1.25” Super 10mm eyepiece
• 1.25” Super 25mm eyepiece
• 1.25” Moon filter
• 5x24 Finderscope and bracket
• Nylon carry bag
Saxon Mini Dob Specifications
Specifications
Optical design Newtonian reflector
Aperture 76mm
Focal length 300mm
Focal ratio f/4
Optical coatings Coated
Eyepieces – 1.25” barrel 20mm (15x), 4mm (75x)
Apparent FOV – 20mm @ 25° and 4mm
@ 33°
Angular FOV w/20mm eyepiece 1.7°
Linear FOV w/20mm – ft@1000 yards /
m@1000metres
89/29
Limiting stellar magnitude 11.9
Resolution – Raleigh (arc seconds) 1.82
Resolution – Dawes Limit (arc seconds) 1.53
Light Gathering Power 118x
Optical tube length 10.5” (26.7cm)
Telescope weight 2kgs