info about filters for astronomy

Ostara filters for ASTRONOMY
The tubes on Ostara
eyepieces and many
other makes of
eyepiece are
threaded to accept
filters, these simply
screw quickly into
place.
MOON FILTERS
“Astro Basics” range
High Quality range
Good quality but basic mount supplied in a
bag or cardboard box
Top quality optics and mount
supplied in a hard plastic case
basic moon ( 1.25” )
basic red ( 1.25” )
basic green ( 1.25” )
basic yellow ( 1.25” )
basic blue ( 1.25” )
basic orange ( 1.25” )
crystal Moon ( 1.25” )
skyglow Moon ( 1.25”)
crystal Moon ( 2” )
skyglow Moon ( 2”)
#23A red ( 1.25” )
#56 green ( 1.25” )
#12 yellow ( 1.25” )
#21 orange ( 1.25” )
#82A blue ( 1.25” )
polarising ( 1.25” )
O-111 ( 1.25” )
O-111 ( 2” )
IR-cut ( 1.25” )
Luminance ( 1.25” )
H-beta ( 1.25” )
UHC ( 1.25” )
GREEN
82A BLUE
and
POLARISING
are also
considered good
for moon
observation
basic moon filter
1.25”
Crystal moon filter
1.25” and 2”
Skyglow moon filter
1.25” and 2”
Please see next page for absorpon specificaon of Skyglow and crystal moon
We also offer a 7pc filter kit comprising of
High quality #23, #56, #12, #21. #82A,
moon and polarising
IR-cut filter 1.25”
absorption graph shown
O-111 filter 1.25” and 2”
absorption graph shown
Luminance filter 1.25”
H-beta filter 1.25”
absorption graph shown
absorption graph shown
The Ostara 5 filter
revolver allows easy
selection of up to
5 different filters.
With 1.25” nose
and camera adaptor
Available without
filters to select your own, or
complete with basic moon,
and 4 basic colours
UHC filter 1.25”
absorption graph shown
Ostara filters are manufactured and distributed by Opcal Hardware Ltd
for your nearest stockist, please visit
www.opcalhardware.co.uk
all offers are subject to availability E.&O.E
Crystal moon filter
Specification
Skyglow moon
filter
Specification
Filter Test :
Start : 200nm
End : 1000nm
Sample interval : 1nm
b/w : 4nm
Ostara filters are manufactured and distributed by Opcal Hardware Ltd
for your nearest stockist, please visit www.opcalhardware.co.uk
all offers are subject to availability E.&O.E