slide it once again over the Ramsden lens which, when the glue has dried,
should lie flush with the outside edge of the ring. Take care not to get any
glue on the surface of the lens. Leave to dry.
Step 36
Remove the small disc from the centre of the 15mm eyepiece base
diaphragm [F4] and fold the six tabs to the front. As a trial run slide the
diaphragm, hexagon first, into the end of the eyepiece shaft [F1] which has
no grey tab markings. Push it in until the tabs are flush with the edge of the
shaft. The opening in the diaphragm should be a good 7mm from the edge
of the shaft. Glue the diaphragm in this position.
Step 37
Glue the tabs of the eye lens mounting to the other end of the shaft
with the eye lens mounting tabs on the outside covering the grey markings
and the eye and Ramsden lenses inside the shaft. Leave to dry. The 15mm
eyepiece is now finished.
Step 38
Fold and glue the eyepiece shaft 28mm [F5] to form a hexagonal
tube, black side inward.
Step 39
Remove the small disc from the centre of the mounting for the
Ramsden lens of the 28mm eyepiece [F6]. Fold the six tabs to the front.
The shape that results is an open hexagonal “chamber” with black walls on
the inside only and a hexagonal “floor” with a hole which is black on both
sides. Now take the lens with f=49mm. This will be the Ramsden lens.
Place it on the outside “floor” of the mounting with the curved side against
the hole and directly in the middle. Here you will find marking cuts to help
you centre it. Glue it in this position. Leave to dry.
Step 40
Slide the lens mounting [F6], Ramsden lens first, into the end of
the eyepiece shaft [F5] which has the grey tab markings, until the mounting
tabs are flush with the edge of the shaft. Glue the mounting in this position.
Step 41
Remove the small disc from the centre of the eye lens mounting
[F7] and fold the six tabs to the back. Take the last lens with f=30mm: this is
the eye lens of the 28mm eyepiece. Glue it with its flat side against the
unprinted black surface of the eye lens mounting centring it exactly over the
pupil. Take care again that no glue is squeezed onto the centre of the lens
when it is pressed onto the card. Leave to dry.
Step 42
Place the eye lens mounting at the same end of the eyepiece shaft
as the Ramsden lens mounting. The curved sides of the eye lens and
Ramsden lens are thus facing each other. Glue the tabs of the eye lens
mounting to the eyepiece shaft.
Step 43
Remove the centre disc from the mounting for the Huygens lens of
the 28mm eyepiece [F8] and fold the six tabs to the front, so that you have
an open, hexagonal, black chamber. Take the lens with f=65mm. This is the
Huygens lens. Glue it with the curved side against the outside of the
chamber floor, once again, exactly centred over the pupil. Leave to dry.
Step 44
Slide the mounting [F8], lens first, into the open end of the
eyepiece shaft [F5] so far that the tabs are flush with the edge of the shaft.
Glue in this position.
Now all the optical components of the telescope are finished and you can
try out the different eyepieces. They should be able to move easily into the
eyepiece connector but also be able to remain stationary in any position. If
necessary you can glue small pieces of paper to the inside of the connector
to create a little bit more friction.
Note for people wearing glasses: It may be necessary in some cases to
shorten the eyepieces so that they can be pushed further into the eyepiece
connector so that you can focus when wearing your glasses.
The image is focused by moving the eyepiece in the eyepiece connector.
For nearer terrestrial objects it must be pulled out further than for
astronomical objects. Amazingly one can no longer see the secondary
mirror in the image. The reason for this is that the light from a distant object
coming through the telescope opening falls on every single point of the
main mirror in the same way and from there is directed onto the secondary
mirror. If part of the opening is covered, as is the case with the secondary
mirror, the image remains unchanged. But it becomes somewhat darker
because now only part of the main mirror is being used for gathering the
light.
WARNING: Never point your telescope at the sun without the
sun-filter on its opening.
Step 36
Remove the small disc from the centre of the 15mm eyepiece base
diaphragm [F4] and fold the six tabs to the front. As a trial run slide the
diaphragm, hexagon first, into the end of the eyepiece shaft [F1] which has
no grey tab markings. Slide it so far until the tabs are flush with the edge of
the shaft. The opening in the diaphragm should be a good 7mm from the
edge of the shaft. Glue the diaphragm in this position.
Step 37
Glue the tabs of the eye lens mounting to the other end of the shaft
with the eye lens mounting tabs on the outside covering the grey markings
and the eye and Ramsden lenses inside the shaft. Leave to dry.
The 15mm eyepiece is now finished.
Step 38
Fold and glue the eyepiece shaft 28mm [F5] to form a hexagonal
tube, black side inward.
Step 39
Remove the small disc from the centre of the mounting for the Ram-
sden lens of the 28mm eyepiece [F6]. Fold the six tabs to the front. The
shape that results is an open hexagonal “chamber” with walls black on the
inside only and a hexagonal “floor” with a hole which is black on both sides.
Now take the lens with
f=49mm. This will be the Ramsden lens. Place it on
the outside “floor” of the mounting with the curved side against the hole and
directly in the middle. Here you will find marking cuts to help you centre it.
Glue it in this position. Leave to dry.
Step 40
Slide the lens mounting [F6], Ramsden lens first, into the end of the
eyepiece shaft [F5] which has the grey tab markings, until the mounting tabs
are flush with the edge of the shaft. Glue the mounting in this position.
Step 41
Remove the small disc from the centre of the eye lens mounting
[F7] and fold the six tabs to the back. Take the last lens with
f=30mm, this is
the eye lens of the 28mm eyepiece. Glue it with its flat side against the
unprinted black surface of the eye lens mounting centring it exactly over the
pupil. Take care once again that no glue will be squeezed into the centre of
the lens when it is pressed on the card.
Leave to dry.
Step 42
Place the eye lens mounting at the same end of the eyepiece shaft
as the Ramsden lens mounting. The curved sides of the eye lens and Ram-
sden lens are thus facing each other. Glue the tabs of the eye lens mounting
to the eyepiece shaft.
Step 43
Remove the centre disc from the mounting for the Huygens lens of
the 28mm eyepiece [F8] and fold the six tabs to the front, so that you have an
open, hexagonal, black, chamber. Take the lens with
f=65mm. This is the
Huygens lens. Glue it with the curved side against the outside of the cham-
ber floor, once again, exactly centred over the pupil. Leave to dry.
Step 44
Slide the mounting [F8], lens first, into the open end of the eyepiece
shaft [F5] so far that the tabs are flush with the edge of the shaft. Glue in this
position.
Now all the optical components of the telescope are finished and you can try
out the different eyepieces. They should be able to move easily in the eye-
piece connector but also be able to remain stationary in any position. If nec-
essary you can glue small pieces of paper to the inside of the connector to
create a little bit more friction.
Note for those wearing glasses: It may be necessary in some cases to shorten
the eyepieces so that they can be pushed further into the eyepiece connec-
tor.
The image is focused by moving the eyepiece on the eye piece connector.
For nearer terrestrial objects it must be pulled out further than for astronomi-
cal objects. Amazingly one can no longer see the secondary mirror in the
image. One can explain this because the light from a far distant object com-
ing through the telescope opening falls on every single point of the main
mirror in the same way and from there is directed onto the secondary mirror.
If part of the opening is covered, as is the case with the secondary mirror,
the image remains unchanged. But it becomes somewhat darker because
now only part of the main mirror is being used for gathering the light.
WARNING:
Never point your telescope at the sun without the sun-filter on it.
The Sights
In order to be able to point the telescope quickly to a particular object there
are two sights that are known by the technical term ”diopter”.
Step 45
Remove the small squares from the two halves of the front sight
[G1]+[G2]. Fold the foot tabs to the front and glue both halves together with
the unprinted sides facing. After drying, glue the foot tabs of the finished
sight onto the marked position in the middle of the mirror segment not far
from the main mirror.
Step 46
Repeat with the two halves of the rear sight [G3] and [G4] and glue
them onto the marked position in the middle of the sight segment of the main
body.
Warning:
Never look at the sun through the sights.
The Mounting
With every hand held telescope with over 8-10 times magnification, the im-
age is unsteady because the small movements of the arm and hand are
magnified. Therefore the main body of this telescope is fixed to a table mount-
ing. It is called a Dobson mounting after its inventor. It is also called an azi-
muthal mounting and allows the main body to be rotated horizontally by 360
degrees and vertically by over 90 degrees. It consists of a base plate, right
and left supports (which are connected via a bridge) and their lateral sup-
ports. The semi-circular cut-outs at the top of the supports are the holders
for the axles that can be found on either side of the telescope. The degree
scales on the axle covers show the angle of inclination between the axis of
the telescope and the base.
Step 47
Glue the unprinted sides of the top and bottom of the base plate
[H1] and [H2] together. Press the base plate whilst drying to ensure it is flat.
Step 48
Fold the foot tabs and the inner half of the bridge of the inner right-
hand support [J1] to the front.
Step 49
Fold the two foot tabs of the outside right-hand support [J2] to the
front and glue it exactly on the back of the inside support [J1]. The inner half
of the bridge and the tabs remain unglued. Make sure it dries flat.
Step 50
Repeat for the left hand side supports [J3] and [J4] which are mirror
images of the right hand side. Assemble in the same way.
Step 51
Place the two supports next to each other so that the unprinted
halves of the bridge are uppermost and butt neatly up against each other
without any gap. Join them with a piece of sticky tape. This joined inner side
of the bridge should now be identical to the outside front of the bridge [J5]
(without its glue tabs).
Step52
Position the two supports on the markings of the base plate [J1]+[J2]
with the foot tabs spread apart. The unprinted side of the bridge is facing
outwards as are the grey markings on the two supports. Position the sup-
ports so that they are parallel to each other and centred on the base plate.
The foot tabs are equidistant to the edge of the base-plate and only the
markings for the front of the bridge remain open. Glue in this position.
Step 53
Bend the foot tabs of the front part of the bridge [J5] to the front and
the two side tabs to the back. Glue it to the unprinted side of inner bridge.
The foot tabs should butt up to the foot tabs of the side supports and be
glued into position. The side tabs should also be glued to the side supports.
Step 54
Take the front piece of the right hand side buttress support [K1] and
fold the two grey tabs and the triangular tab, to which the smaller tab is
attached, to the back. All the other folds are to the front. Fold all the grooves
of the rear piece of the right hand side buttress [K2] to the front.
Step 55
The folds divide [K2] into 3 parts, one of which is shorter than the
others and has a stepped top. [K1] has an identical mirror image part with a
small grey area at the bottom. These two should be glued together back to
back keeping the foot tabs unglued. The long tab on the front piece should
be glued to the back of the rear piece. Finally fold the two sides outwards so
they make a 60 degree angle between them and glue the tab on the small
triangular cover piece to the back of the rear piece leaving the pointer trian-
gle free (see photograph).
Step 56
After drying, try to position the right-hand buttress support without
any glue against the right hand support. The foot tabs should fit exactly over
buttress support
The Sights
In order to be able to point the telescope quickly to a particular object, there
are two sights that are known by the technical term “diopter”.
Step 45
Remove the small squares from the two halves of the front sight
[G1]+[G2]. Fold the foot tabs to the front and glue both halves together with
the unprinted sides. After drying, glue the foot tabs of the finished sight onto
the marked position in the middle of the mirror segment not far from the
main mirror.
Step 46
Repeat with the two halves of the rear sight [G3] and [G4] and glue
them onto the marked position in the middle of the sight segment of the
main body.
Warning: Never look at the sun through the sights.
Step 36
Remove the small disc from the centre of the 15mm eyepiece base
diaphragm [F4] and fold the six tabs to the front. As a trial run slide the
diaphragm, hexagon first, into the end of the eyepiece shaft [F1] which has
no grey tab markings. Slide it so far until the tabs are flush with the edge of
the shaft. The opening in the diaphragm should be a good 7mm from the
edge of the shaft. Glue the diaphragm in this position.
Step 37
Glue the tabs of the eye lens mounting to the other end of the shaft
with the eye lens mounting tabs on the outside covering the grey markings
and the eye and Ramsden lenses inside the shaft. Leave to dry.
The 15mm eyepiece is now finished.
Step 38
Fold and glue the eyepiece shaft 28mm [F5] to form a hexagonal
tube, black side inward.
Step 39
Remove the small disc from the centre of the mounting for the Ram-
sden lens of the 28mm eyepiece [F6]. Fold the six tabs to the front. The
shape that results is an open hexagonal “chamber” with walls black on the
inside only and a hexagonal “floor” with a hole which is black on both sides.
Now take the lens with
f=49mm. This will be the Ramsden lens. Place it on
the outside “floor” of the mounting with the curved side against the hole and
directly in the middle. Here you will find marking cuts to help you centre it.
Glue it in this position. Leave to dry.
Step 40
Slide the lens mounting [F6], Ramsden lens first, into the end of the
eyepiece shaft [F5] which has the grey tab markings, until the mounting tabs
are flush with the edge of the shaft. Glue the mounting in this position.
Step 41
Remove the small disc from the centre of the eye lens mounting
[F7] and fold the six tabs to the back. Take the last lens with
f=30mm, this is
the eye lens of the 28mm eyepiece. Glue it with its flat side against the
unprinted black surface of the eye lens mounting centring it exactly over the
pupil. Take care once again that no glue will be squeezed into the centre of
the lens when it is pressed on the card.
Leave to dry.
Step 42
Place the eye lens mounting at the same end of the eyepiece shaft
as the Ramsden lens mounting. The curved sides of the eye lens and Ram-
sden lens are thus facing each other. Glue the tabs of the eye lens mounting
to the eyepiece shaft.
Step 43
Remove the centre disc from the mounting for the Huygens lens of
the 28mm eyepiece [F8] and fold the six tabs to the front, so that you have an
open, hexagonal, black, chamber. Take the lens with
f=65mm. This is the
Huygens lens. Glue it with the curved side against the outside of the cham-
ber floor, once again, exactly centred over the pupil. Leave to dry.
Step 44
Slide the mounting [F8], lens first, into the open end of the eyepiece
shaft [F5] so far that the tabs are flush with the edge of the shaft. Glue in this
position.
Now all the optical components of the telescope are finished and you can try
out the different eyepieces. They should be able to move easily in the eye-
piece connector but also be able to remain stationary in any position. If nec-
essary you can glue small pieces of paper to the inside of the connector to
create a little bit more friction.
Note for those wearing glasses: It may be necessary in some cases to shorten
the eyepieces so that they can be pushed further into the eyepiece connec-
tor.
The image is focused by moving the eyepiece on the eye piece connector.
For nearer terrestrial objects it must be pulled out further than for astronomi-
cal objects. Amazingly one can no longer see the secondary mirror in the
image. One can explain this because the light from a far distant object com-
ing through the telescope opening falls on every single point of the main
mirror in the same way and from there is directed onto the secondary mirror.
If part of the opening is covered, as is the case with the secondary mirror,
the image remains unchanged. But it becomes somewhat darker because
now only part of the main mirror is being used for gathering the light.
WARNING:
Never point your telescope at the sun without the sun-filter on it.
The Sights
In order to be able to point the telescope quickly to a particular object there
are two sights that are known by the technical term ”diopter”.
Step 45
Remove the small squares from the two halves of the front sight
[G1]+[G2]. Fold the foot tabs to the front and glue both halves together with
the unprinted sides facing. After drying, glue the foot tabs of the finished
sight onto the marked position in the middle of the mirror segment not far
from the main mirror.
Step 46
Repeat with the two halves of the rear sight [G3] and [G4] and glue
them onto the marked position in the middle of the sight segment of the main
body.
Warning:
Never look at the sun through the sights.
The Mounting
With every hand held telescope with over 8-10 times magnification, the im-
age is unsteady because the small movements of the arm and hand are
magnified. Therefore the main body of this telescope is fixed to a table mount-
ing. It is called a Dobson mounting after its inventor. It is also called an azi-
muthal mounting and allows the main body to be rotated horizontally by 360
degrees and vertically by over 90 degrees. It consists of a base plate, right
and left supports (which are connected via a bridge) and their lateral sup-
ports. The semi-circular cut-outs at the top of the supports are the holders
for the axles that can be found on either side of the telescope. The degree
scales on the axle covers show the angle of inclination between the axis of
the telescope and the base.
Step 47
Glue the unprinted sides of the top and bottom of the base plate
[H1] and [H2] together. Press the base plate whilst drying to ensure it is flat.
Step 48
Fold the foot tabs and the inner half of the bridge of the inner right-
hand support [J1] to the front.
Step 49
Fold the two foot tabs of the outside right-hand support [J2] to the
front and glue it exactly on the back of the inside support [J1]. The inner half
of the bridge and the tabs remain unglued. Make sure it dries flat.
Step 50
Repeat for the left hand side supports [J3] and [J4] which are mirror
images of the right hand side. Assemble in the same way.
Step 51
Place the two supports next to each other so that the unprinted
halves of the bridge are uppermost and butt neatly up against each other
without any gap. Join them with a piece of sticky tape. This joined inner side
of the bridge should now be identical to the outside front of the bridge [J5]
(without its glue tabs).
Step52
Position the two supports on the markings of the base plate [J1]+[J2]
with the foot tabs spread apart. The unprinted side of the bridge is facing
outwards as are the grey markings on the two supports. Position the sup-
ports so that they are parallel to each other and centred on the base plate.
The foot tabs are equidistant to the edge of the base-plate and only the
markings for the front of the bridge remain open. Glue in this position.
Step 53
Bend the foot tabs of the front part of the bridge [J5] to the front and
the two side tabs to the back. Glue it to the unprinted side of inner bridge.
The foot tabs should butt up to the foot tabs of the side supports and be
glued into position. The side tabs should also be glued to the side supports.
Step 54
Take the front piece of the right hand side buttress support [K1] and
fold the two grey tabs and the triangular tab, to which the smaller tab is
attached, to the back. All the other folds are to the front. Fold all the grooves
of the rear piece of the right hand side buttress [K2] to the front.
Step 55
The folds divide [K2] into 3 parts, one of which is shorter than the
others and has a stepped top. [K1] has an identical mirror image part with a
small grey area at the bottom. These two should be glued together back to
back keeping the foot tabs unglued. The long tab on the front piece should
be glued to the back of the rear piece. Finally fold the two sides outwards so
they make a 60 degree angle between them and glue the tab on the small
triangular cover piece to the back of the rear piece leaving the pointer trian-
gle free (see photograph).
Step 56
After drying, try to position the right-hand buttress support without
any glue against the right hand support. The foot tabs should fit exactly over
buttress support
The Mounting
As with every hand held telescope with over 8-10 times magnification, the
image is unsteady because the small movements of the arm and hand are
magnified as well. Therefore the main body of this telescope is fitted to a
table mounting. It is called a Dobson mounting after its inventor. It is also
called an azimuthal mounting and allows the main body to be rotated
horizontally by 360 degrees and vertically by over 90 degrees. It consists of
a base plate, right and left supports (which are connected via a bridge), and
their lateral supports. The semi-circular cut-outs at the top of the supports
are the holders for the axles that can be found on either side of the
telescope. The degree scales on the axle covers show the angle of
inclination between the axis of the telescope and the base.
Step 47
Glue the unprinted sides of the top and bottom of the base plate
[H1] and [H2] together. Press the base plate whilst drying to ensure it is flat.
Step 48
Fold the foot tabs and the inner half of the bridge of the inner right-
hand support [J1] to the front.
Step 49
Fold the two foot tabs of the outside right-hand support [J2] to the
front and glue it exactly onto the back of the inside support [J1]. The inner
half of the bridge and the tabs remain unglued. Make sure it dries flat.
Step 50
Repeat for the left hand side supports [J3] and [J4] which are
mirror images of the right hand side. Assemble in the same way.
Step 51
Place the two supports next to each other so that the unprinted
halves of the bridge are uppermost and butt neatly up against each other
without any gap. Join them with a piece of sticky tape. This joined inner side
of the bridge should now be identical to the outside front of the bridge [J5]
(without its glue tabs).
Step 52
Position the two supports on the markings of the base plate [J1]+
[J2] with the foot tabs spread apart. The unprinted side of the bridge is
facing outwards as are the grey markings on the two supports. Position the
supports so that they are parallel to each other and centred on the base
plate. The foot tabs are equidistant to the edge of the base plate and only
the markings for the front of the bridge remain open. Glue in this position.
Step 53
Bend the foot tabs of the front part of the bridge [J5] to the front
and the two side tabs to the back. Glue it to the unprinted side of the inner
bridge. The foot tabs should butt up to the foot tabs of the side supports and
be glued into position. The side tabs should also be glued to the side
supports.
Step 54
Take the front piece of the right hand side buttress support [K1]
and fold the two grey tabs and the triangular tab, to which the smaller tab is
attached, to the back. All the other folds are to the front. Fold all the grooves
of the rear piece of the right hand side buttress [K2] to the front.
Step 55
The folds divide [K2] into 3 parts, one of which is shorter than the
others and has a stepped top. [K1] has an identical mirror image part with a
small grey area at the bottom. These two should be glued together back to
back keeping the foot tabs unglued. The long tab on the front piece should
be glued to the back of the rear piece. Finally fold the two sides outwards
so they make a 60 degree angle between them and glue the tab on the
small triangular cover piece to the back of the rear piece leaving the pointer
triangle free (see photograph).
Step 56
After drying, try to position the right-hand buttress support without
any glue against the right hand support.The foot tabs should fit exactly over
