ASKAR FMA180 objective lens features
Triplet air-spaced APO design, includes two pieces of ED (extra-low
dispersion) glass, providing excellent correction of chromatic
aberration, which lays the foundation for high quality astrophotography
In the field of amateur astronomy, it
is rare to find an astrograph with a focal length less than 200mm, which is
conventionally a specialty of the ordinary cameras. But the ordinary cameras
are not specialized for astrophotography, so the images taken by them may not
Askar FMA180, a ground-breaking optical device, can reach great sharpness as
well as exactly other long-focal-length astrographs.
FMA180 is compact with a main tube length of mere 145mm and a weight of 395g.
Besides, it can also function as a quality finder or guider.
Therefore, the standard configuration contains a pair of tube rings and a
finder bracket for practical installation or attachment. The finder bracket can
be divided into two parts. One is the bracket stalk and the dovetail foot for
supporting the whole bracket and the other is a dovetail plate which can be
disassembled and independently attached to a tripod or other camera tripod
heads with the same thread type. The dovetail plate conforms to standard
ARCA-SWISS requirement and is carved with corresponding slots and holes for
easy connections. The plate is also designed to realize the connection to an
equatorial mount with standard Vixen dovetail base.
The portable size enables the FMA180
to be easily attached as an ordinary camera lens and wipe off the troublesome and
burdensome toil when you go on a trip to explore the universe.
Below are the FMA180 configurations.
1) Main tube + focuser + reducer +
reducer connection extension tube: 180mm F4.5 sextuplet APO flat
field correction astrograph lens (recommended photographic mode, product
2) Main tube + focuser + extension tube 1 + extension
tube 2+reducer connection extension tube : 220mm F5.5
triplet APO lens
1) Main tube + focuser +
extension tube 1 + 1.25" adapter: It can be combined with 1.25" star
diagonal and eyepiece for standard observation mode or finderscope mode.
2) Main tube + focuser + extension tube 1 + extension tube 2: It can be
combined with 1.25" eyepiece for cisual observation mode or finderscope mode.