OM System BMF-SE01 Body Mount Soft Filter

OM System BMF-SE01 Body Mount Soft Filter Summary

The OM System BMF-SE01 Body Mount Soft Filter is an internal camera filter that alters the rendering of point light sources in astrophotography. It mounts inside compatible OM System camera bodies between the lens mount and image sensor, regardless of attached lens.

Stars are typically recorded as precise points of light, which can appear visually flat in some night sky images. This filter subtly diffuses brighter stars, increasing their apparent size and making them stand out more clearly against the sky. The effect becomes stronger as star brightness increases, while the rest of the image remains largely unaffected.

Because the filter is body mounted, it can be used with lenses that do not support front-mounted filters, including ultra-wide and fisheye lenses. Only one body mount filter can be installed at a time. The BMF-SE01 is intended for astrophotography and is compatible with selected OM SYSTEM Micro Four Thirds camera bodies, including the OM-3 Astro.

OM System BMF-SE01 Body Mount Soft Filter Key Features

• Internal body mount filter fitted between lens mount and image sensor
• Softens and enlarges bright point light sources
• Emphasises star colour and visual presence
• Stronger effect on brighter stars without affecting overall scene
• Works with lenses that cannot accept front-mounted filters
• Single filter installation at a time
• Compatible with selected OM SYSTEM Micro Four Thirds bodies

Compatible cameras

• OM System OM-3 Astro
• OM System OM-3
• OM System OM-1 Mark II
• OM System OM-1
• Olympus E-M1 Mark III
• Olympus E-M1 Mark III Astro

Frequently asked questions

Do these filters attach to the lens?

No. They install inside the camera body, between the lens mount and the image sensor.

Can I mount lenses normally once the filter is installed?

Yes. Lenses mount and operate exactly as normal.

Do the filters work with all lenses?

They work with any compatible Micro Four Thirds lens, including wide-angle and fisheye lenses.

Can I change lenses without removing the filter?

Yes. The filter stays in place when lenses are changed.

Can both filters be used at the same time?

No. Only one body mount filter can be installed at a time.

Are these filters for daytime photography?

No. They are intended for astrophotography and night sky use.

What’s in the box

• OM System BMF-SE01 Body Mount Soft Filter