Baader 100mm 5 Optical Dense
AstroSolar Spotter Filter:
Baader 100mm 5 Optical Dense AstroSolar Spotter Filter is a lightweight and
reliable filter that provide a professional and secure solution to observe and
image the Sun using AstroSolar Safety Film OD 5.0. This absolutely does destroy
the image quality, rendering the film useless for high magnification work.
AstroSolar must be mounted entirely stress free in order to perform like a high
precision planeoptical window. It sounds like a contradiction with traditional
perception of quality, but AstroSolar must show slight ripples.
Made of original Baader AstroSolar Safety Visual Film (ND 5.0) and is cell mounted
The AstroSolar filter material is mounted onto a plastic ring where the plastic ring itself works as stabilizing element for the filter cell
This still plastic ring is mounted onto the aluminium front frame
The thermal expansion coefficient of the plastic and the film are similar
Clear white IR-rejecting front ring with reinforcing raised edges along the outer and inner circumference, designed to protect the solar filter material from contact with any sharp metal edge
This fastening system keeps the filter snugly in place and centres the filter
Each bolt features injection moulded rubber grip-faces, shaped to easily slide onto any telescope tube but hard to come off.
No tool mounting and adjustment of the centring bolts to fit a wide variety of mechanical tube diameters
Bolts are made to contact the outside of the optical instrument tube for most applications
For some optical items (such as refractor and Newtonian reflector telescopes), you may be able to attach the bolts on the inside of the instrument tube
However, this requires a clear depth of about 20mm on the inside for adequate engagement of the centring bolts which many instruments (like binoculars, camera lenses, and SCT/Mak-Cass telescopes) do not have
Additional Phillips screws are integrated into the sliding fasteners so that the centring bolts can be firmly fastened with a screw driver if preferred by the user
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 aluminium frame – for blocking sunlight from passing trough the filter cell beside the filter area
A safety feature to absolutely ensure a secure fit in front of the telescope under virtually all circumstances
