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Solar filters

Astromania Deluxe Solar Filter 100 mm

Astromania's Deluxe solar filter: Baader AstroSolar film in an anodized aluminum cell 100 mm across, with a 75 mm clear aperture, three padded clamping screws for tubes 70 to 92 mm in outside diameter, citing ISO 12312-2:2015.

Astromania Deluxe 100 mm full-aperture solar filter cell

Astromania Deluxe Solar Filter 100 mm

Astromania's Deluxe solar filter: Baader AstroSolar film in an anodized aluminum cell 100 mm across, with a 75 mm clear aperture, three padded clamping screws for tubes 70 to 92 mm in outside diameter, citing ISO 12312-2:2015.

Cell fit and outside diameter
Fits tubes with an outside diameter of 70 to 92 mm (2.76 to 3.62 in) · 75 mm clear aperture · 100 mm cell outer diameter
Film or glass construction
Baader AstroSolar film in an anodized aluminum cell · listing states some wavy lines on the film may be visible and do not affect observation
Cited standard
ISO 12312-2:2015, as the listing states · see the maker's instructions
Mounting security
Three clamping screws with protective plastic caps
Image color
Not published by the maker.
Supplied storage
Not published by the maker.
Amazon reference
B07439W4R8
EAN
6970019299129
  • Named film (Baader AstroSolar) and a cited standard
  • Fit range published: 70 to 92 mm tube outside diameter
  • Must be measured against the tube before buying

Best for: The front of a telescope whose tube outside diameter has been measured first

≈ $35
Check price on Amazon

Specifications

Cell fit and outside diameter
Fits tubes with an outside diameter of 70 to 92 mm (2.76 to 3.62 in) · 75 mm clear aperture · 100 mm cell outer diameter
Film or glass construction
Baader AstroSolar film in an anodized aluminum cell · listing states some wavy lines on the film may be visible and do not affect observation
Cited standard
ISO 12312-2:2015, as the listing states · see the maker's instructions
Mounting security
Three clamping screws with protective plastic caps
Image color
Not published by the maker.
Supplied storage
Not published by the maker.
Amazon reference
B07439W4R8
EAN
6970019299129

Film, cell and standard

Astromania’s Deluxe filter uses Baader AstroSolar film in an anodized aluminum cell. The listing cites ISO 12312-2:2015 for it. The film covers the front of the telescope, the only place a solar filter belongs.

The fit, in millimeters

The cell is 100 mm across with a 75 mm clear aperture and fits tubes whose outside diameter is 70 to 92 mm. Three clamping screws with plastic caps hold it without marking the tube. Measure the front of your tube, or its dew shield, before ordering.

The listing’s own warnings

Never use the telescope if the filter is in any disrepair, Astromania writes, and some wavy lines on the film are normal.

Safety, on the maker’s terms

This page does not state that any filter makes solar observing safe. Read the maker’s instructions, inspect the film each time, cover the finder, and see ISO 12312-2 solar viewing and what makers publish for an eclipse.

Price and availability

On November 7, 2026, Amazon.com listed it at about $35 from a third-party seller.

Figures as Keepa reported them on the day this page was last updated. Stock and pricing shift without warning.

Prices quoted in this text were read on November 7, 2026. The live price is at the top of the page.

What gets asked before buying

Will it fit my telescope?

Measure the outside diameter of the front of the tube or dew shield. It must be between 70 and 92 mm. The clear aperture is 75 mm.

Is solar viewing with it safe?

This page does not certify safety. The listing cites ISO 12312-2:2015 and Baader AstroSolar film. Follow the maker's instructions, inspect the film before every use, never use it if damaged, and see [ISO 12312-2 solar viewing](/standards/iso-12312-2-solar-viewing/).

What about the finder?

Cover or remove the telescope's finder before pointing at the Sun. An unfiltered finder concentrates sunlight.

What barrel it suits

The rest of this rack

  • Sky-Watcher white cast counterweight with a central bore

    Sky-Watcher EQ6-R counterweight (S30101)

    Sky-Watcher's 11 lb counterweight for the AZ-EQ5, EQ6 and EQ6-R mounts, sold on a listing of one bullet and one sentence.

    Mass
    11 lb (5 kg), stated
    Bore diameter
    Not published by the maker.
    Locking method
    Not published by the maker.
    Coating
    Not published by the maker.
    Finish
    White, per the title
    Compatible mounts
    AZ-EQ5, EQ6 and EQ6-R, stated
    Overall dimensions
    Not published by the maker.
    Amazon reference
    B0758P6QQZ
    EAN
    0050234301015
    • Named compatibility: AZ-EQ5, EQ6, EQ6-R
    • Sold directly by Amazon
    • Bore diameter not published

    Best for: An AZ-EQ5, EQ6 or EQ6-R that needs a large extra increment on the bar

    ≈ $55
    Check price on Amazon
  • Astromania five-position 2 inch filter wheel

    Astromania 2 in five-position filter wheel (FW2M5)

    A manual filter wheel holding five standard 2 in filters in an aluminum housing, with a 2 in adapter for the focuser and a light-tight interior. The Amazon.com listing warns that the focuser needs 22.5 mm (0.89 in) of extra inward travel. About $85 from a third-party seller.

    Positions
    Five, numbered 1 to 5, for any standard 2 in filter
    Housing
    Aluminum, described as stiff enough for heavy cameras, without flexure or tilt
    Light sealing
    Interior stated as light-tight, for imaging without reflections or stray light
    Telescope side
    2 in adapter supplied for the focuser
    Camera side threads
    Not stated on the Amazon.com listing; Astromania's European listings name T-2 and M48
    Inward focus needed
    22.5 mm (0.89 in) from the normal focus position, per the Amazon.com listing; the French and German listings say 20 mm
    Weight
    594 g (1.3 lb), in Amazon's product details
    Storage
    The box doubles as a storage case
    Power and software
    None: a manual wheel
    Amazon reference
    B0140UA9F6
    EAN
    6970019290355
    • Publishes the inward focus it consumes, the figure that decides whether it works at all
    • Light-tight aluminum housing, stated stiff enough for a heavy camera
    • 22.5 mm (0.89 in) of inward focus is more than some refractors can give

    Best for: A Newtonian or Dobsonian imaging train with enough inward focus, where filters change often during a session.

    ≈ $85
    Check price on Amazon
  • Briny River M42 to M48 anodized aluminum step-up ring

    Briny River M42 to M48 step-up ring (390-EG)

    A step-up ring converting the T-2 thread to M48, so that 2 in filters and M48 accessories can be fitted to T-2 components.

    Slot count and filter size
    M42 × 0.75 male — the T-2 thread · M48 × 0.75 female — the 2 in filter thread
    Optical path length
    The listing gives none
    Manual or motorized operation
    A thread adapter — no optics, and not a filter wheel
    Light sealing
    Aluminum alloy, anodized
    Power
    Not published by the maker.
    Software support
    Not published by the maker.
    Amazon reference
    DE B0FM49SGJH · US B0FM48JF46 · GB B0FM48JF46 · FR B0FM48JF46 · IT B0FM48JF46 · ES B0FM48JF46
    EAN
    4895264934644
    • Both threads are named precisely with pitch, which is what an adapter listing must do
    • Anodized aluminum resists the corrosion that ruins a thread left damp
    • No length figure, and every adapter consumes back focus

    Best for: Putting an M48 filter or accessory onto a T-2 threaded component

    Check price on Amazon

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