SVBONY MK105 Manual Del Usuario página 7

When using an eyepiece with short focal length (small number in millimeters), the image will be dim and
the range of sharp focus will be small. The image will be harder to see so begin with an eyepiece with
long focal length. Dividing the focal length of the telescope by the focal length of the eyepiece gives the
magnification.
Example: Calculating the eyepiece magnification of a telescope with 1365mm focal length.
Eyepiece
SPL25mm
SPL15mm
SPL8mm
PHOTOGRAPHIC CONFIGURATION
(This demo diagram cannot be used directly and needs to be updated according to our actual product
collocation)
·Photography with an SLR Camera
·Photography with Eyepiece Projection
·Photography with CMOS or CCD Video Camera
Note: Some of optional accessories shown in this chart will be needed if you take pictures with SLR camera,
digital camera or CCD video camera.
SPECIFICATIONS
1.Optical System: Maksutov-Cassegrain
2.Primary Mirror: Multi-coated Precision Aluminum Coating
3.Secondary Mirror: 99% Reflectivity Dielectric Coatings
4.Effective Aperture: 105mm
5.Focal Length: 1365mm
6.Focal Ratio: f/13
7.Resolving Power: 1.1arc Seconds
8.Limiting Magnitude: 12.1
9.Light Gathering Power: 210x
HOW TO COLLIMATE THE OPTICAL AXIS
1.There are three pairs of the collimation adjustment screws on the back frame of the optical tube.
2.The screws are covered with black rubber caps.
3.Each pair of the collimation adjustment screws consists of a pushing screw and a pulling screw. Before using
these screws to make collimation adjustments, dissolve the adhesive agent with thinner or alcohol, otherwise
heads of the screws may be broken with a screw driver. When making a star image out of focus, you can see a
dark silhouette of the secondary mirror in the field of view. If the dark silhouette of the secondary mirror is not
centered, collimation adjustments will be needed. To center the dark silhouette, tighten the pushing screw toward
which the dark silhouette is out of center. If the pushing screw cannot be tightened any more, loosen the pulling
screw once before tightening the pushing screw. It is advisable to start with a low-power eyepiece, and then use
a high-power eyepiece in order to achieve good collimation adjustments.
Focal length of telescope
1365mm
1365mm
1365mm
Focal length of eyepiece
25mm
15mm
8mm
05
Magnification
54.6x
91x
170x