* The Drop-in Filter Mount
Adapter EF-EOS R with ND Filter: Costs Rs 31,995 and will be available next year
The drop-in filter mount
adapter offers the ability to use a range of drop-in filters (drop-in circular polarizing filter or drop-in variable ND filter).
You'll pay around PS100 for the lens and battery case, PS20 for the steady cam counterweight and PS20 for the filter mount
The filter's gasket forms independent seals with the base of the filter mount
, which provide a seal against particles and vapors.
The optional filter mount
allows the element to be removed from the top of the canister, minimizing oil leakage during service.
The use of the natural rubber M2A2 facepiece (which became the M8 snou t-type facepiece with the inclusion of the head strap and filter mount
) kept this mask in use for more than 10 years.
The models with a 0.7-angstrom bandpass have a single tunable 60-mm hydrogen-alpha filter mounted
in front of the objective, while the 0.5-angstrom models have a double-stacked filter set.
If your filter mounts
vertically, fill it with fresh oil before installing it.
You can buy either kind of filter mounted
in cells that are sized to fit onto the front of many telescopes.
In the chamber experiment, the fractional aerosol removal efficiency is calculated from the aerosol decay rates observed for three cases: background case (no filter and no ion generation), filter mounted
but without ion generation, filter and ion generation active.