Levenhuk Blitz 70 PLUS Guia Del Usuario página 21

also rotated around the R.A. axis. Pointing in any direction other than due North requires a combination
of R.A. and Dec. positions.
Telescopes with long focal lengths often have a "blind spot" when pointing near the zenith, because
the eyepiece-end of the optical tube bumps into the mount's legs. To avoid this, the tube can be very
carefully slipped up inside the ring clamps. This can be done safely because the tube is pointing almost
vertically, and therefore moving it does not cause a Dec. balance problem. It is very important to move
the tube back to the Dec. balanced position before observing other sky areas.
Something which can also be a problem is that the optical tube often rotates so that the eyepiece,
finderscope and the focusing knobs are in less convenient positions. The diagonal mirror can be rotated to
adjust the eyepiece. However, to adjust the positions of the finderscope and focusing knobs, loosen the
tube rings holding the telescope tube and gently rotate it. Do this when you are going to observe an area
for while, as it is inconvenient to repeat every time you briefly go to a new area.
Finally, there are a few things to consider to ensure that you are comfortable during the viewing session.
First is setting the height of the mount above the ground by adjusting the tripod legs. You must consider
the height that you want your eyepiece to be, and if possible plan on sitting on a comfortable chair or
stool. Very long optical tubes need to be mounted higher or you will end up crouching or lying on the
ground when looking at objects near the zenith. However, a short optical tube can be mounted lower
so that there is less movement due to vibration sources, such as wind. This is something that should be
decided before going through the effort of polar aligning the mount.
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