8
05 | ASSEMBLY INSTRUCTIONS
The Merkur 910 is supplied in one carton. The components are packed in various inner cartons. The
tripod legs are individually packed and stowed below the other cartons.
05.1 TRIPOD/MOUNT
First unpack the tripod legs (18). Adjust them all at the same length by extending them by 30 to 40 cm.
Then fi x the screws (19). Now prepare all the mount components (11) + (14) with the 3 long screws
(16) and the wing nuts (17). Fix the 3 tripod legs at the mount base (14). Slide the top of each tripod leg
over one of the tripod connections of the mount base (14). Then fi x the screws (16) and (17) smoothly.
Note! The loose metal brackets (20) must points towards the inner side.
All 3 screws (16) + (17) at the tripod head/mount base (14) should mount into the same direction.
Now unpack the tripod tray (21) and the screws with washers (22) and wing nuts (23). Place the
tripod and mount in front of you. Connect one edge of the tripod tray (21) with one of the brackets
(20) by sliding the bracket below the tray and use 1 set of screws & nuts (22) + (23) to fi x it smoothly.
Repeat the procedure with the 2 other edges of the tray. Correct the fi xings in a way that the tripod
will stand even. Then fi rmly fi x the tray (21) to the tripod. Afterwards fi x the screws (16) at the tripod
head/mount base (14). A small triangle metal plate supplied with the accessories serves ideally as
a screw driver. Prepare the telescope mounting by fi xing the locking screw (15) tightly so that the
mount won’t rotate.
05.2 MOUNTING THE TELESCOPE
Unpack the telescope tube (1) thoroughly and remove the protection cover. For the time being leave
the covers at the lens (2) and at the eyepiece mount (7). Both at the left and right side within the tube
there are screw mounts with 2 wing screws (13). Remove these wing screws. At the right hand side of
the mount there is a chrome-plated screw (12). Unscrew it until the round opening in the lower fi xed
chromeplated part becomes fully free. Lift the telescope tube (1) over the mount (11). The bracket
must be tilted backwards. At the right hand side of the telescope tube there is a chrome-plated bar
(9). Slide this bar into the opening described at the lateral chrome-plated screw at the right side of
the mount (12). Position the telescope tube onto the mount bracket in a way that the two screw
mounts match exactly with the openings of them mount. Now screw the wing screws (13) through
the bracket into the telescope tube screw mounts. Fix the screws evenly while the telescope is in
horizontal position. Also fi x the chromeplated screw (12) at the right side of the mount. Now the
two screws (13) at the telescope and the screw (12) serve for the height adjustment of the telescope.
For fi ne adjustment you can also use the fi ne adjustment bar (9) by turning its socket union back
and forth.
05.3 MOUNTING THE FINDERSCOPE
Unpack the Finderscope (3) and its support (4). At the rear top end of the telescope there are two
chromeplated screws (5) for the fi nderscope bracket. Unscrew these and fi x the support (4) at the
screw mounts. For proper direction make sure that the smaller part of the fi nderscope (ocular side)
points to the rear end of the telescope. Now fi x the screws (5) at the telescope tube. Fix and adjust the
fi nderscope using the 3 small screws around the support (4). (For details refer to section Adjusting
the Finderscope).
05.3 EYEPIECES AND ACCESSORIES
First remove the lens cover (2) at the telescope tube (1). On top of the cover, there is another small lid.
If you only remove the small lid, you can reduce the incidence of light. Now also remove the cover
of the eyepiece mount (7). When you do not use your telescope, make sure to put the covers back.
06 | EYEPIECES
3 eyepieces with diameter 11⁄4” (31.5mm) are included:
SR4 = 227,5x (455x*)
H12.5 = 72,8x (145,6x*)
H20 = 45,5x (91x*)
*with 2-times barlow lens
07 | HOW TO CALCULATE THE MAGNIFICATION FACTOR
The magnifi cation factor calculates very simply as follows:
Take the eyepiece H20 with the smallest magnification. Insert the eyepiece (6) into the eyepiece
mount (7) and tighten it using the 2 small outer screws. Now you can start your observations.
CAUTION!
Observations of the sun are extremely dangerous. Do not use this telescope for sun observati-
on. The optical elements have the eff ects of a burning glass and will blind you!
The ideal way to
make safe sun observations is the usage of a special sun fi lter foil, which is fi xed at the front end
of the telescope. The foil absorbs 99.9% of the sunlight.
08 | STARTING OBSERVATIONS
Direct your telescope at daylight to a known object (house, church, tree or mountain). For the height
adjustment of your telescope, loosen the screws (13 and (12). The lateral adjustment can be done
with the small chrome-plated screw (15). Make sure to hold the telescope fi rmly, while you make the-
se adjustments. Aim your desired object through the telescope and tighten the mentioned screws
again. Your object will be visible up-side-down and reverse which is caused by optical eff ects. Under
astronomical consideration, there is no “top” and “bottom”.
09 | FOCUSING
Turn the focus wheel (10) at the rear side of the telescope forth and back to focus your object pro-
perly. The adjustment will vary according to the distance of the object and depending on the usage
of diff erent components.
10 | ERECTING EYEPIECE FOR TERRESTRIAL OBSERVATIONS
To correct the reverse image, the supplied erecting eyepiece 1.5x can be used. It comes with 1 side
11⁄4” outer dia. and 1 side 11⁄4” inner dia. Insert the smaller part into the eyepiece mount (7) and fi x it
using the two small screws of the eyepiece mount. Insert your eye-piece H20 at the other side of
the prism and fi x it with the small screws as described for the eyepieces earlier. This combination
achieves a magnifi cation of 45 x 1.5 = 67x. You can now start observation as usual.
11 | DIAGONAL PRISM 90°
A rectangular diagonal prism is included in this telescope package. It comes with 1 side 11⁄4” outer
dia. and 1 side 11⁄4” inner dia. It mainly serves for zenith observations and hereby allows a lateral view
of 90°. So you don’t have to stand behind or under your telescope. Insert the smaller part into the
empty eyepiece mount (7) and tighten the screws. Now insert your eyepiece H20 into the diagonal
prism. The image will now be upright, but still reverse. The magnifi cation does not change.
12 | BARLOW LENS
The 2x barlow lens expands the original magnifi cation of your eyepieces (6) by the factor 2. To insert
it, follow the instructions of the erecting eyepiece. Observe and adjust as usual.
13 | RECOMMENDATION
We recommend starting your observations always with small magnifi cation. This guarantees you a
wider fi eld of view and you can recognize and focus your objects faster. The larger the magnifi ca-
tion, the fi eld of view decreases and you risk blurred images. The celestial objects will move faster
out of the range of your telescope and you have to track more often.
Focal Length of Teleskope
= Magnifi cation
e.g.:
910
= 225x
Focal Length of Eyepiece
4
