AstroMedia 209.NST Anweisungen - Seite 4

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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

slide it once again over the Ramsden lens which, when the glue has dried,

diaphragm, hexagon first, into the end of the eyepiece shaft [F1] which has

should lie ﬂush with the outside edge of the ring. Take care not to get any

no grey tab markings. Slide it so far until the tabs are flush with the edge of

glue on the surface of the lens. Leave to dry.

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 36 Remove the small disc from the centre of the 15mm eyepiece base

Step 37 Glue the tabs of the eye lens mounting to the other end of the shaft

diaphragm [F4] and fold the six tabs to the front. As a trial run slide the

with the eye lens mounting tabs on the outside covering the grey markings

diaphragm, hexagon ﬁrst, into the end of the eyepiece shaft [F1] which has

diaphragm, hexagon first, into the end of the eyepiece shaft [F1] which has

and the eye and Ramsden lenses inside the shaft. Leave to dry.

no grey tab markings. Push it in until the tabs are ﬂush with the edge of the

no grey tab markings. Slide it so far until the tabs are flush with the edge of

The 15mm eyepiece is now finished.

shaft. The opening in the diaphragm should be a good 7mm from the edge

the shaft. The opening in the diaphragm should be a good 7mm from the

Step 38 Fold and glue the eyepiece shaft 28mm [F5] to form a hexagonal

of the shaft. Glue the diaphragm in this position.

edge of the shaft. Glue the diaphragm in this position.

tube, black side inward.

Step 37 Glue the tabs of the eye lens mounting to the other end of the shaft

Step 39 Remove the small disc from the centre of the mounting for the Ram-

with the eye lens mounting tabs on the outside covering the grey markings

sden lens of the 28mm eyepiece [F6]. Fold the six tabs to the front. The

and the eye and Ramsden lenses inside the shaft. Leave to dry. The 15mm

and the eye and Ramsden lenses inside the shaft. Leave to dry.

shape that results is an open hexagonal "chamber" with walls black on the

eyepiece is now ﬁnished.

The 15mm eyepiece is now finished.

inside only and a hexagonal "floor" with a hole which is black on both sides.

Step 38 Fold and glue the eyepiece shaft 28mm [F5] to form a hexagonal

Now take the lens with f =49mm. This will be the Ramsden lens. Place it on

tube, black side inward.

the outside "floor" of the mounting with the curved side against the hole and

Step 39 Remove the small disc from the centre of the mounting for the

Step 39 Remove the small disc from the centre of the mounting for the Ram-

directly in the middle. Here you will find marking cuts to help you centre it.

Ramsden lens of the 28mm eyepiece [F6]. Fold the six tabs to the front.

sden lens of the 28mm eyepiece [F6]. Fold the six tabs to the front. The

Glue it in this position. Leave to dry.

The shape that results is an open hexagonal "chamber" with black walls on

shape that results is an open hexagonal "chamber" with walls black on the

Step 40 Slide the lens mounting [F6], Ramsden lens first, into the end of the

the inside only and a hexagonal "ﬂoor" with a hole which is black on both

inside only and a hexagonal "floor" with a hole which is black on both sides.

eyepiece shaft [F5] which has the grey tab markings, until the mounting tabs

sides. Now take the lens with f=49mm. This will be the Ramsden lens.

Now take the lens with f =49mm. This will be the Ramsden lens. Place it on

are flush with the edge of the shaft. Glue the mounting in this position.

Place it on the outside "ﬂoor" of the mounting with the curved side against

the outside "floor" of the mounting with the curved side against the hole and

Step 41 Remove the small disc from the centre of the eye lens mounting

directly in the middle. Here you will find marking cuts to help you centre it.

the hole and directly in the middle. Here you will ﬁnd marking cuts to help

[F7] and fold the six tabs to the back. Take the last lens with f =30mm, this is

Glue it in this position. Leave to dry.

you centre it. Glue it in this position. Leave to dry.

the eye lens of the 28mm eyepiece. Glue it with its flat side against the

Step 40 Slide the lens mounting [F6], Ramsden lens first, into the end of the

Step 40 Slide the lens mounting [F6], Ramsden lens ﬁrst, into the end of

unprinted black surface of the eye lens mounting centring it exactly over the

eyepiece shaft [F5] which has the grey tab markings, until the mounting tabs

the eyepiece shaft [F5] which has the grey tab markings, until the mounting

pupil. Take care once again that no glue will be squeezed into the centre of

are flush with the edge of the shaft. Glue the mounting in this position.

tabs are ﬂush with the edge of the shaft. Glue the mounting in this position.

the lens when it is pressed on the card.

Step 41 Remove the small disc from the centre of the eye lens mounting

Leave to dry.

[F7] and fold the six tabs to the back. Take the last lens with f =30mm, this is

[F7] and fold the six tabs to the back. Take the last lens with f=30mm: this is

Step 42 Place the eye lens mounting at the same end of the eyepiece shaft

the eye lens of the 28mm eyepiece. Glue it with its flat side against the

as the Ramsden lens mounting. The curved sides of the eye lens and Ram-

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

sden lens are thus facing each other. Glue the tabs of the eye lens mounting

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

to the eyepiece shaft.

pupil. Take care again that no glue is squeezed onto the centre of the lens

the lens when it is pressed on the card.

Step 43 Remove the centre disc from the mounting for the Huygens lens of

when it is pressed onto the card. Leave to dry.

Leave to dry.

the 28mm eyepiece [F8] and fold the six tabs to the front, so that you have an

Step 42 Place the eye lens mounting at the same end of the eyepiece shaft

open, hexagonal, black, chamber. Take the lens with f =65mm. This is the

as the Ramsden lens mounting. The curved sides of the eye lens and

as the Ramsden lens mounting. The curved sides of the eye lens and Ram-

Huygens lens. Glue it with the curved side against the outside of the cham-

Ramsden lens are thus facing each other. Glue the tabs of the eye lens

sden lens are thus facing each other. Glue the tabs of the eye lens mounting

ber floor, once again, exactly centred over the pupil. Leave to dry.

mounting to the eyepiece shaft.

to the eyepiece shaft.

Step 44 Slide the mounting [F8], lens first, into the open end of the eyepiece

Step 43 Remove the centre disc from the mounting for the Huygens lens of

shaft [F5] so far that the tabs are flush with the edge of the shaft. Glue in this

the 28mm eyepiece [F8] and fold the six tabs to the front, so that you have

the 28mm eyepiece [F8] and fold the six tabs to the front, so that you have an

position.

an open, hexagonal, black chamber. Take the lens with f=65mm. This is the

open, hexagonal, black, chamber. Take the lens with f =65mm. This is the

Now all the optical components of the telescope are finished and you can try

Huygens lens. Glue it with the curved side against the outside of the

Huygens lens. Glue it with the curved side against the outside of the cham-

out the different eyepieces. They should be able to move easily in the eye-

chamber ﬂoor, once again, exactly centred over the pupil. Leave to dry.

ber floor, once again, exactly centred over the pupil. Leave to dry.

piece connector but also be able to remain stationary in any position. If nec-

Step 44 Slide the mounting [F8], lens ﬁrst, into the open end of the

Step 44 Slide the mounting [F8], lens first, into the open end of the eyepiece

essary you can glue small pieces of paper to the inside of the connector to

eyepiece shaft [F5] so far that the tabs are ﬂush with the edge of the shaft.

shaft [F5] so far that the tabs are flush with the edge of the shaft. Glue in this

create a little bit more friction.

Glue in this position.

position.

Note for those wearing glasses: It may be necessary in some cases to shorten

Now all the optical components of the telescope are finished and you can try

Now all the optical components of the telescope are ﬁnished and you can

the eyepieces so that they can be pushed further into the eyepiece connec-

out the different eyepieces. They should be able to move easily in the eye-

try out the different eyepieces. They should be able to move easily into the

tor.

piece connector but also be able to remain stationary in any position. If nec-

eyepiece connector but also be able to remain stationary in any position. If

The image is focused by moving the eyepiece on the eye piece connector.

essary you can glue small pieces of paper to the inside of the connector to

necessary you can glue small pieces of paper to the inside of the connector

For nearer terrestrial objects it must be pulled out further than for astronomi-

create a little bit more friction.

to create a little bit more friction.

cal objects. Amazingly one can no longer see the secondary mirror in the

Note for those wearing glasses: It may be necessary in some cases to shorten

Note for people wearing glasses: It may be necessary in some cases to

image. One can explain this because the light from a far distant object com-

the eyepieces so that they can be pushed further into the eyepiece connec-

shorten the eyepieces so that they can be pushed further into the eyepiece

ing through the telescope opening falls on every single point of the main

tor.

connector so that you can focus when wearing your glasses.

mirror in the same way and from there is directed onto the secondary mirror.

The image is focused by moving the eyepiece on the eye piece connector.

The image is focused by moving the eyepiece in the eyepiece connector.

If part of the opening is covered, as is the case with the secondary mirror,

For nearer terrestrial objects it must be pulled out further than for astronomi-

the image remains unchanged. But it becomes somewhat darker because

For nearer terrestrial objects it must be pulled out further than for

cal objects. Amazingly one can no longer see the secondary mirror in the

now only part of the main mirror is being used for gathering the light.

astronomical objects. Amazingly one can no longer see the secondary

image. One can explain this because the light from a far distant object com-

WARNING: Never point your telescope at the sun without the sun-filter on it.

mirror in the image. The reason for this is that the light from a distant object

ing through the telescope opening falls on every single point of the main

coming through the telescope opening falls on every single point of the

mirror in the same way and from there is directed onto the secondary mirror.

main mirror in the same way and from there is directed onto the secondary

If part of the opening is covered, as is the case with the secondary mirror,

mirror. If part of the opening is covered, as is the case with the secondary

the image remains unchanged. But it becomes somewhat darker because

mirror, the image remains unchanged. But it becomes somewhat darker

now only part of the main mirror is being used for gathering the light.

because now only part of the main mirror is being used for gathering the

WARNING: Never point your telescope at the sun without the sun-filter on it.

light. WARNING: Never point your telescope at the sun without the

sun-ﬁlter on its opening.

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".

The Sights

Step 45 Remove the small squares from the two halves of the front sight

In order to be able to point the telescope quickly to a particular object, there

[G1]+[G2]. Fold the foot tabs to the front and glue both halves together with

are two sights that are known by the technical term "diopter".

the unprinted sides facing. After drying, glue the foot tabs of the finished

Step 45 Remove the small squares from the two halves of the front sight

The Sights

sight onto the marked position in the middle of the mirror segment not far

[G1]+[G2]. Fold the foot tabs to the front and glue both halves together with

In order to be able to point the telescope quickly to a particular object there

from the main mirror.

the unprinted sides. After drying, glue the foot tabs of the ﬁnished sight onto

are two sights that are known by the technical term "diopter".

Step 46 Repeat with the two halves of the rear sight [G3] and [G4] and glue

the marked position in the middle of the mirror segment not far from the

Step 45 Remove the small squares from the two halves of the front sight

them onto the marked position in the middle of the sight segment of the main

main mirror.

[G1]+[G2]. Fold the foot tabs to the front and glue both halves together with

body.

Step 46 Repeat with the two halves of the rear sight [G3] and [G4] and glue

the unprinted sides facing. After drying, glue the foot tabs of the finished

Warning: Never look at the sun through the sights.

them onto the marked position in the middle of the sight segment of the

sight onto the marked position in the middle of the mirror segment not far

main body. Warning: Never look at the sun through the sights.

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.

buttress support

The Mounting

As with every hand held telescope with over 8-10 times magniﬁcation, the

With every hand held telescope with over 8-10 times magnification, the im-

image is unsteady because the small movements of the arm and hand are

age 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

buttress support

magnified. Therefore the main body of this telescope is fixed to a table mount-

table mounting. It is called a Dobson mounting after its inventor. It is also

ing. It is called a Dobson mounting after its inventor. It is also called an azi-

called an azimuthal mounting and allows the main body to be rotated

muthal mounting and allows the main body to be rotated horizontally by 360

horizontally by 360 degrees and vertically by over 90 degrees. It consists of

The Mounting

degrees and vertically by over 90 degrees. It consists of a base plate, right

With every hand held telescope with over 8-10 times magnification, the im-

a base plate, right and left supports (which are connected via a bridge), and

and left supports (which are connected via a bridge) and their lateral sup-

age is unsteady because the small movements of the arm and hand are

their lateral supports. The semi-circular cut-outs at the top of the supports

ports. The semi-circular cut-outs at the top of the supports are the holders

magnified. Therefore the main body of this telescope is fixed to a table mount-

are the holders for the axles that can be found on either side of the

for the axles that can be found on either side of the telescope. The degree

ing. It is called a Dobson mounting after its inventor. It is also called an azi-

telescope. The degree scales on the axle covers show the angle of

scales on the axle covers show the angle of inclination between the axis of

muthal mounting and allows the main body to be rotated horizontally by 360

inclination between the axis of the telescope and the base.

the telescope and the base.

degrees and vertically by over 90 degrees. It consists of a base plate, right

Step 47 Glue the unprinted sides of the top and bottom of the base plate

and left supports (which are connected via a bridge) and their lateral sup-

[H1] and [H2] together. Press the base plate whilst drying to ensure it is ﬂat.

[H1] and [H2] together. Press the base plate whilst drying to ensure it is flat.

ports. The semi-circular cut-outs at the top of the supports are the holders

Step 48 Fold the foot tabs and the inner half of the bridge of the inner right-

for the axles that can be found on either side of the telescope. The degree

hand support [J1] to the front.

scales on the axle covers show the angle of inclination between the axis of

Step 49 Fold the two foot tabs of the outside right-hand support [J2] to the

the telescope and the base.

front and glue it exactly on the back of the inside support [J1]. The inner half

front and glue it exactly onto the back of the inside support [J1]. The inner

Step 47 Glue the unprinted sides of the top and bottom of the base plate

of the bridge and the tabs remain unglued. Make sure it dries flat.

half of the bridge and the tabs remain unglued. Make sure it dries ﬂat.

[H1] and [H2] together. Press the base plate whilst drying to ensure it is flat.

Step 50 Repeat for the left hand side supports [J3] and [J4] which are mirror

Step 50 Repeat for the left hand side supports [J3] and [J4] which are

Step 48 Fold the foot tabs and the inner half of the bridge of the inner right-

images of the right hand side. Assemble in the same way.

mirror images of the right hand side. Assemble in the same way.

hand support [J1] to the front.

Step 51 Place the two supports next to each other so that the unprinted

Step 49 Fold the two foot tabs of the outside right-hand support [J2] to the

halves of the bridge are uppermost and butt neatly up against each other

front and glue it exactly on the back of the inside support [J1]. The inner half

without any gap. Join them with a piece of sticky tape. This joined inner side

of the bridge and the tabs remain unglued. Make sure it dries flat.

of the bridge should now be identical to the outside front of the bridge [J5]

Step 50 Repeat for the left hand side supports [J3] and [J4] which are mirror

(without its glue tabs).

images of the right hand side. Assemble in the same way.

Step52 Position the two supports on the markings of the base plate [J1]+[J2]

Step 52 Position the two supports on the markings of the base plate [J1]+

Step 51 Place the two supports next to each other so that the unprinted

with the foot tabs spread apart. The unprinted side of the bridge is facing

[J2] with the foot tabs spread apart. The unprinted side of the bridge is

halves of the bridge are uppermost and butt neatly up against each other

outwards as are the grey markings on the two supports. Position the sup-

facing outwards as are the grey markings on the two supports. Position the

without any gap. Join them with a piece of sticky tape. This joined inner side

ports so that they are parallel to each other and centred on the base plate.

supports so that they are parallel to each other and centred on the base

of the bridge should now be identical to the outside front of the bridge [J5]

The foot tabs are equidistant to the edge of the base-plate and only the

plate. The foot tabs are equidistant to the edge of the base plate and only

(without its glue tabs).

markings for the front of the bridge remain open. Glue in this position.

Step52 Position the two supports on the markings of the base plate [J1]+[J2]

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

with the foot tabs spread apart. The unprinted side of the bridge is facing

Step 53 Bend the foot tabs of the front part of the bridge [J5] to the front

the two side tabs to the back. Glue it to the unprinted side of inner bridge.

outwards as are the grey markings on the two supports. Position the sup-

and the two side tabs to the back. Glue it to the unprinted side of the inner

The foot tabs should butt up to the foot tabs of the side supports and be

ports so that they are parallel to each other and centred on the base plate.

bridge. The foot tabs should butt up to the foot tabs of the side supports and

glued into position. The side tabs should also be glued to the side supports.

The foot tabs are equidistant to the edge of the base-plate and only the

be glued into position. The side tabs should also be glued to the side

Step 54 Take the front piece of the right hand side buttress support [K1] and

markings for the front of the bridge remain open. Glue in this position.

supports.

fold the two grey tabs and the triangular tab, to which the smaller tab is

Step 53 Bend the foot tabs of the front part of the bridge [J5] to the front and

Step 54 Take the front piece of the right hand side buttress support [K1]

attached, to the back. All the other folds are to the front. Fold all the grooves

the two side tabs to the back. Glue it to the unprinted side of inner bridge.

and fold the two grey tabs and the triangular tab, to which the smaller tab is

of the rear piece of the right hand side buttress [K2] to the front.

The foot tabs should butt up to the foot tabs of the side supports and be

Step 55 The folds divide [K2] into 3 parts, one of which is shorter than the

attached, to the back. All the other folds are to the front. Fold all the grooves

glued into position. The side tabs should also be glued to the side supports.

others and has a stepped top. [K1] has an identical mirror image part with a

of the rear piece of the right hand side buttress [K2] to the front.

Step 54 Take the front piece of the right hand side buttress support [K1] and

small grey area at the bottom. These two should be glued together back to

Step 55 The folds divide [K2] into 3 parts, one of which is shorter than the

fold the two grey tabs and the triangular tab, to which the smaller tab is

back keeping the foot tabs unglued. The long tab on the front piece should

others and has a stepped top. [K1] has an identical mirror image part with a

attached, to the back. All the other folds are to the front. Fold all the grooves

be glued to the back of the rear piece. Finally fold the two sides outwards so

small grey area at the bottom. These two should be glued together back to

of the rear piece of the right hand side buttress [K2] to the front.

they make a 60 degree angle between them and glue the tab on the small

back keeping the foot tabs unglued. The long tab on the front piece should

Step 55 The folds divide [K2] into 3 parts, one of which is shorter than the

triangular cover piece to the back of the rear piece leaving the pointer trian-

be glued to the back of the rear piece. Finally fold the two sides outwards

others and has a stepped top. [K1] has an identical mirror image part with a

gle free (see photograph).

so they make a 60 degree angle between them and glue the tab on the

small grey area at the bottom. These two should be glued together back to

Step 56 After drying, try to position the right-hand buttress support without

small triangular cover piece to the back of the rear piece leaving the pointer

back keeping the foot tabs unglued. The long tab on the front piece should

any glue against the right hand support. The foot tabs should fit exactly over

triangle free (see photograph).

be glued to the back of the rear piece. Finally fold the two sides outwards so

Step 56 After drying, try to position the right-hand buttress support without

they make a 60 degree angle between them and glue the tab on the small

any glue against the right hand support.The foot tabs should ﬁt exactly over

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