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5.2 Exchanging AstroSolar
®
Film
5.2.1
Each sheet of film is being cemented in our factory onto
a white (AS
T
F / B
D
SF) or black (AS
S
F/AS
B
F) plastic
ring, by using a special variant of temperature resistant
and age proof double sticky tape. For filter exchange this
ring must be accessed.
5.2.2
Unmount the injection molded black plastic ring from the
white metal front ring by removing each of the M3
Phillips head screws with the help of a small
watchmakers screwdriver.
5.2.3
The various rings will come apart and provide access to
the ring-side where the filter material is affixed.
5.2.4
Gently lift the film from the holding ring by cutting into the
middle of the filter and pulling the remaining material
from inside to outside all around the ring. Doing this with
the right amount of slowness and care will even keep the
original sticky tape intact to be right away used for
affixing a new sheet of film.
5.2.5.
In case that some of the sticky tape has been lifted off
the plastic ring together with the film removal, then all
the sticky tape needs to be removed and replaced all
around with your own tape solution
5.2.6
Check out the link below and follow the instructions from
paragraph 3 to 7 on how to apply the new film onto the
holding ring:
www.astrosolar.com/en/information/how-to/how-to-make-your-
own-objective-solar-filter-for-your-camera-or-telescope/
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bother and better be left alone rather than be removed by
repeated cleaning processes.
However - heavy wind movement as well as dirt or pollen as
well as their removal procedure itself may lead to the formation
of small pinholes in the metallization. Please see Appendix A
(A.2) for further information on Pinholes.
Still the cell mounted filter MUST be inspected most carefully
before each and every solar session. Someone might have
severely dented the filter surface during earlier removal from the
telescope or might have severely rubbed the film in an attempt
to "clean" it. In each case were the surface quality raises
suspicion during visual inspection by holding it against the Sun -
of having large imperfections or scratch marks of more than 0.5
mm width, or dented portions with incision marks which might
even lead to breaking the film
- in every such case, the film
must be discharged and replaced.
For more information please visit
www.astrosolar.com/en/faqs
