USAGE:
The Quark is de signed for use o n F/4 to F/9 refractors. Combined with
an integrated 4.3x telecen tric barlow, this results in a F/17 to F/38 final
image respectively, to provide the best performance from your filter.
Because of the incl uded barlo w, ima ges will a ppear 4x larg er than
without the Quark, and ample additional backfocus is available.
The filter mu st be plu gged in usi ng th e su pplied power supply. The
etalon cavity is precision heated to regulate the wavelength of the filter
output.
Any other USB power source you wish to use must be rated for at least
1.5 amps at 5 volts. Co mputer USB ports and cell phone chargers d o
not normally support this much power.
After letting the filter come up to temperature and settle, the light will turn
green and viewing can begin.
Knob tuning:
If the imag e la cks contrast, you may nee d t o adj ust th e ce nter
wavelength of the filter.
A knob is provided to adjust the center wavelength of the filter. Turn th e
knob counter clockwise to lower the wavelength towards the blue by u p
to 0.5Å. Turn clockwise to raise the wavelength towards the red by up to
0.5Å. Each click of the knob is 0.1Å.
Tuning i s required on tele scopes with “droop” of th e focu ser, be cause
even very sli ght tilts will effectivel y lower th e ce nter wavelengt h of the
filter. Turn the kno b clockwise 2-3 clicks and wait 5-10 minutes to see if
the view is improved.
Additional tu ning can be performed, j ust ke ep in mi nd that after every
adjustment of the knob
the filter
must settle in tempera ture for
approximately 5-10 minutes before your change becomes effective.
Tuning can also b e use d to observe Doppler shifted feature s moving
towards or away from you. A feature moving towards you will be brighter
in blue (counterclockwise) wing shift, away from you will be reddened
(clockwise knob tuning).
