Bedienungsanleitung Vixen VMC260L (Seite 4 von 4) (Englisch)

784603

Zoom out

Zoom in

Vorherige Seite

1/4

Nächste Seite

How to Re-collimate the VMC260L Optical Tube

1. Re-collimation of the optical axis will go much faster if you have an assistant.

2. The star image will shift considerably even if the collimation screws are adjusted only a small amount.

3. If one of the three collimation screws comes to the end in either direction, turn the other two collimation screws on the opposite

side to the reverses so that you can continue the re-collimation.

4. Optical collimation is very delicat and you should avoid turning the collimation screws excessively.

Speciﬁcations Handling and Storage

① There are threee Allen

screws for collimation

which are placed near

the center the four-

vane spider on the

front of the optical

tube.

② Attach an eyepiece with

medium power (60X to

80X) onto the eyepiece holder and get a relatively bright

star such as the Polar star into the telescope´s ﬁeld of view.

Turn the focus knob to defocus the star image fully until it

is enlarged and blurred as much as one third of the viewing

ﬁeld. The silhouette of the secondary mirror is seen near the

center of the

blurred star

image at this

time.

RE-COLLIMATION

③ If the optical axis is aligned correctly, both the blurred star

image and silhouette of the secondary mirror can be seen at

the center of the telescope‘s ﬁeld of view. If it is not aligned

concentrically, move those images to the center of the ﬁeld

of view. With an Allen wrench, adjust the collimation screw

nearest or furthest from the direction of those images.

The VMC260L telescopes are collimated properly at Vixen‘s factory before shipment. The telescopes hold the

collimation unless they are handled roughly. You can re-collimate your telescope using the following procedure if

necessary.

④ Turn the collimation screw clockwise or counterclockwise

gradually until the blurred star image and silhouette of the

secondary mirror are aligned concentrically in the center

of the telescope‘s ﬁeld of view.

⑤ Use an eyepiece with high magniﬁcation and repeat the

above procedures so that you can make more precise

re-collimation of the optical axis.

⑥ When re-collimation of the telescope is done properly,

you perform a star test

with a medium to high

power eyepiece selecting a

star of the second or third

magnitude.

Right after you focus on the

star precisely, defocus the

star image slightly to look at

a diffraction pattern of the

star.

if the concentric diffraction

rings can be seen, the

optical axis have been

re-collimated properly.

Spider

Collimation

Allen Screws

Secondary

Mirror Holder

Misaligned largely

Out of collimation slightly

Collimated properly

Silhouette Silhouette

- Do not leave the product inside a car in bright sunshine or in other hot

places. Keep away strong heat at sources away from the product.

- When cleaning, do not use solvents such as paint thinner or similar

products.

- Avoid touching any lens or mirror surfaces directly with your hands.

In case a lens or mirror becomes dirty with ﬁngerprints or general

smears, gently wipe it using a commercially available lens ceaner and

a lens cleaning paper or cloth, or consult you local Vixen dealer.

- Blow off dust on lenses using a commercially available blower brush.

- For storage, keep the product in a dry place and do not expose to

direct sunlight.

Model VMC260L Optical Tube Assembly

Optical Design Precision Spherical Mirror & Meniscus Lens System

Effective Aperture 260mm

Focal Length 3000mm

Focal Ratio 1 : 11.5

Light Gathering Power 1380X

Resolving Power 0.45 arc seconds

Limiting Magnitude 13.8

Threads 60mm, 42mm for T-Ring

Visual Back 50.8mm (2.0“), 31.7mm (1.25“)

Optical Tube Length 650mm

Outer Diameter 304mm

Weight 10.9 Kgs (24 lbs)

7X50 Finder Scope

(6.8 degrees ﬁeld of view) Supplied

Flip Mirror Diagonal Supplied

Mounting System Dovetail Slide Rail and Mounting Platform

Carry Handle Supplied

Missbrauch melden von Frage und/oder Antwort

Libble nimmt den Missbrauch seiner Dienste sehr ernst. Wir setzen uns dafür ein, derartige Missbrauchsfälle gemäß den Gesetzen Ihres Heimatlandes zu behandeln. Wenn Sie eine Meldung übermitteln, überprüfen wir Ihre Informationen und ergreifen entsprechende Maßnahmen. Wir melden uns nur dann wieder bei Ihnen, wenn wir weitere Einzelheiten wissen müssen oder weitere Informationen für Sie haben.

Vixen VMC260L Seite 4

Brauchen Sie Hilfe? Stellen Sie Ihre Frage.

Missbrauch melden von Frage und/oder Antwort

Art des Missbrauchs:

Forenregeln

Neu registrieren

Andere Handbücher von Vixen VMC260L

Das Handbuch wird per E-Mail gesendet. Überprüfen Sie ihre E-Mail.

Ihre Frage wurde zu diesem Forum hinzugefügt

Info