Universal 3D Printable Solar Filter Holder for Camera Lenses - 105 mm lens (for Eclipse or observation)

Description - This is the 105mm filter; for 79mm the link is here: https://www.printables.com/model/1796737-universal-3d-printable-solar-filter-holder-for-cam

This is a modular 3D printable solar filter holder designed for DSLR and mirrorless camera lenses. The design consists of two main parts:

• Base

• Top retaining ring

Together they securely clamp a sheet of certified solar filter film, creating a sturdy and reusable solar filter suitable for solar photography.

The holder also includes dedicated protective caps to shield the solar film during transport and storage, reducing the risk of scratches, punctures, and accidental damage.

The hexagonal texture provides additional grip while giving the filter a clean and however looks cool ;-) .

Available Sizes & Travel-Friendly Design

Two versions are currently available:

• 79 mm

• 105 mm

The design allows the smaller 79 mm filter holder to fit inside the larger 105 mm version, making the system fully stackable.

This is particularly useful when travelling with multiple lenses, as both filters can be stored together in a camera bag or suitcase while taking up minimal space. Combined with the protective caps, the stackable design also provides additional protection during transport.

Assembly

1. Cut a piece of certified solar filter film to the appropriate size.

2. Lay the film flat on the base.

3. I recommend securing the film temporarily using:

   • a small piece of adhesive tape, or

   • a tiny drop of cyanoacrylate (super glue) outside the optical area.

4. Place the top retaining ring over the film.

5. Make the screw holes through the film.

6. Assemble the two parts using M3 screws.

7. Tighten evenly until the holder becomes a single rigid assembly.

The filter film does not need to be stretched tight. Small wrinkles generally do not affect solar imaging quality.

Lens Attachment

The design includes recessed hexagonal pockets that can accept M5 nuts.

By installing M5 nuts, you can use M5 screws as adjustable clamps to securely fit different lens diameters.

If required, the model can also be scaled slightly and the mounting holes adjusted accordingly.

The provided sizes should already fit many telephoto and super-telephoto lenses commonly used for solar photography.

Protective Caps

Each filter holder includes dedicated protective caps that I strongly recommend using whenever the filter is not mounted on a lens as the filter membrane is delicate.

Printing Recommendations

• Material: PETG, or ASA - WHITE, not in other colours

• Layer Height: 0.16 - 0.20 mm

• Infill: 15–25%

• Walls: 3–4 perimeters

• Supports: Not required

Important Safety Notice

⚠ This model is only a mechanical holder.

A certified solar observation filter film (such as Baader AstroSolar® Safety Film or an equivalent product) must be installed before use.

Never point a camera, telescope, binoculars, or your eyes at the Sun without a proper solar filter.

Always inspect the filter before each use and replace it immediately if any hole, scratch, tear, or other damage is detected.

Disclaimer

This design is provided as-is. The author assumes no responsibility for damage to equipment, injury, or eye damage resulting from incorrect assembly or improper use. The user is solely responsible for verifying that the solar filter film is correctly installed and safe before every use.