Barska AR10858 Manuel d'instructions télécharger pdf (Page 12)

magnification of 100x -125x can be expected with 60 mm diameter objective lens to obser-

ve most celestial objects. A lower magnification power is advisable for the observation of

stars.

The field of view is wider so that the object for observation is more easily localized. The

highest magnification power should only be used for particularly clear observations of the

moon an object that is relatively close and exceptionally bright, so that good detail resolu-

tion is achieved at high magnification ratios.

BARLOW LENS

The Barlow lens increases the magnification of the telescope. A 3x Barlow lens will therefo-

re triple the telescope's magnification power. Consequently a 56x magnification can be tri-

pled to 168x with a 3x Barlow lens. The highest magnification power of the Barlow lens

should only be used for large and bright objects such as the moon and the brightest planets,

as well as for nights with optimal observation conditions.

Do not use the Barlow lens and the erecting eyepiece in conjunction with the angle prism

as this produces a particularly low resolution level with the result that the image can no lon-

ger be sharply focuses. To use the Barlow lens take the angle prism out of the tube. Insert

the Barlow lens into the focus tube and then attach the required eyepiece to the Barlow lens,

focusing is then completed in the customary manner.

VERY IMPORTANT GENERAL REMARKS

Avoid sudden temperature fluctuations as the moisture in the air will condense on the objec-

tive lens. Should this happen, then place the objective lens not too close to a source of heat

and allow the moisture to evaporate slowly.

CAUTION

TO AVOID EYE DAMAGE NEVER LOOK THROUGH THE TELESCOPE INTO ANOTHER

OPTICAL INSTRUMENT, INTO THE SUN OR A LIGHT SOURCE.

NEVER LEAVE A TELESCOPE UNATTENDED, A CHILD COULD LOOK AT THE SUN

WITH IT AND SUFFER PERMANENT EYE DAMAGE.

When mounting the parts ensure that the securing screws are not tightened too firmly. This

could damage the parts or the internal thread of the holders with the result that the screws

can no longer be tightened!

english

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Barska AR10858 Manuel d'instructions Page 12