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25
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Baader Solar Filters are available in 3 categories with a total of
21 filter sizes:
A.1 AS
T
F / B
D
SF
(AstroSolar
®
Telescope
Filter)
This family of solar filters is made in the most elaborate way.
AstroSolar
®
must not be put under stress, neither during
mounting the film, nor during any temperature change. For this
reason the AS
T
F-Filter features a temperature compensated
cell. The film itself is repeatedly cemented onto an injection
molded ring, whereas the substrate of that ring has the same
thermal expansion coefficient like the AstroSolar
®
Filter material
itself. This free floating film-carrier ring is held onto the
aluminum frame with the help of another holding ring made of
fiber reinforced plastic - for a maximum of security against
breaking of the cell. This temperature compensated cell enables
the
AstroSolar
®
filter
material
to
retain
its
excellent optical quality at
any temperature - be it
-30
°C or +50°C.
AS
T
F 80 to 280 packages
all come with two sets of
centering bolts in 38 mm
length (3 bolts with10 mm
diameter and 3 bolts with
20mm diameter) to cover a
wide
range
of
tube
diameters.
Most ASTF filter sizes are additionally available in the version
“
B
D
SF
“
(Baader
Digital
Solar Filter) with AstroSolar
®
Photo Film
3.8.
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Index scale provided beside each adjustment slot -
adjacent to each sliding fastener, for fast and repeatable
adjustment of the filter cell onto different telescope tubes.
Black sliding washers supplied to securely cover the full
length of the adjustment slots in the aluminum frame - for
blocking sunlight from passing through the filter cell beside
the filter area.
Only for AS
T
F/B
D
SF Filters: Rubber plugs supplied as
cover for closing unused adjustment slots in the aluminum
frame.
Three safety straps included, to secure the position of the
filter cell with Velcro-adhesive pads. A safety feature to
absolutely ensure a secure fit in front of the telescope
under any circumstances (gust of wind asf).
Warning text printed onto the front side of each filter cell:
Read the Instructions before use.
Cardboard gift box fit for safely shipping the filter.
AS
S
F
AstroSolar
Spotter
Filter
AS
B
F
AstroSolar
Binocular
Filter
AS
T
F
AstroSolar
Telescope
Filter
