E-M1 Mark III ASTRO + Body Mount Filter Set

A camera specially designed for astronomy that is compatible with Hα radiation and captures the vivid colours of celestial scenes.

The OM SYSTEM E-M1 Mark III ASTRO is a dedicated camera for astrophotography that optimises the IR cut filter located in front of the image sensor of the mirrorless single-lens camera E-M1 Mark III for astrophotography, allowing you to capture colourful red nebulae that are popular among astrophotography enthusiasts. In addition, the filters included with this product, OM SYSTEM's computational photography, and M.ZUIKO DIGITAL lenses enable a wide range of expression from starry sky photography to full-scale astrophotography, such as constellations and nebulae.

*The E-M1 Mark III ASTRO has significantly improved the transmittance of Hα rays, which results in images with a strong reddish cast. We do not recommend using it to capture general subjects other than celestial bodies.

Captures Hα radiation and beautiful red diffuse nebulae that cannot be seen with the naked eye in vivid, high-resolution images.

Covers a wide range of photography scenes, from starry sky photography to astrophotography.

The stacking process of the High Res Shot function enables shooting of higher quality and greater detail.

Useful support functions for astrophotography.

01 Captures Hα radiation and beautiful red diffuse nebulae that cannot be seen with the naked eye in vivid, high-resolution images.

The OM SYSTEM E-M1 Mark III ASTRO has an IR cut filter in front of the image sensor that has been optimised for optical characteristics to achieve approximately 100% transmittance of Hα rays, which are important for astronomical photography. This allows you to vividly capture the beautiful shapes and colours of nebulae that emit light from Hα rays, which are difficult to capture with ordinary digital cameras.

Photograph of Barnard's Loop in the constellation of Orion

E-M1 Mark III ASTRO

M.Zuiko Digital ED 75mm F1.8 60 seconds F2.8 ISO5000 Handheld high-res shot, single shot Using a body-mounted light pollution cut filter and equatorial mount *Image processing done using software.

E-M1 Mark III

M.Zuiko Digital ED 75mm F1.8 60 seconds F2.8 ISO3200 Handheld high-res shot, single shot Equatorial mount used *Image processing done using software.

02 Covers a wide range of photography scenes, from starry sky photography to astrophotography.

Combining a wide variety of M.ZUIKO DIGITAL lenses, from wide-angle to telephoto, which can be selected according to the subject, you can capture beautiful images of various celestial objects, from magnificent starry skies to specific constellations and distant nebulae. In addition, using a commercially available Micro Four Thirds compatible adapter, you can attach it to an astronomical telescope and take pictures.

E-M1 Mark III ASTRO M.Zuiko Digital ED 12mm F2.0 20 seconds F2.0 ISO5000 Fixed shooting, single shot *Image processing done using software.

03 The stacking process of the High Res Shot function enables shooting in higher quality and with greater detail.

High Res Shot is a computational photography function unique to OM SYSTEM that realises high-resolution photography using ultra-high-density pixel information obtained by shooting multiple images. Normally, "Handheld High Res Shot" is used when shooting handheld, but by using it with the camera fixed to a tripod or equatorial mount, the "stacking process" often used in astrophotography can be performed in one shot within the body. This not only results in high definition but also reduces noise.

The "Handheld High Res Shot" function on the E-M1 Mark III uses the slight misalignment that occurs during shooting to generate a high-resolution photo of approximately 50 megapixels from 16 shots. Since the images are aligned one by one when compositing, the Handheld High Res Shot function is performed with the camera fixed to a tripod to generate a composite image in which the movement of the stars due to their diurnal motion has been corrected. In addition, when using an equatorial mount, the composite image is generated, and the misalignment of the stars caused by tracking errors has been corrected.

*When shooting fixed on a tripod, set the shutter speed so that the exposure time per frame is such that the stars appear as dots.

*Depending on the scene, the intended composite image may not be obtained.

*In starry sky photography, the intended results may not be achieved depending on the proportion of the scenery on the ground and the composition.

04 Useful support functions for astrophotography.

Custom mode includes convenient settings for starry sky photography

The camera is equipped with convenient settings for starry sky photography in the custom modes C1 and C2 (mode dial) to make it easy for those just starting astrophotography. In addition to the initial settings, such as setting AF mode to Starry Sky AF and LV Boost to On2, frequently used functions in the astrophotography workflow are assigned to buttons so that they can be called up quickly. While it is common to finish astrophotography by adjusting the colour tone and other aspects during post-shooting development, the custom modes C1 and C2 also have settings suitable for astrophotography, such as white balance and tone curve, so that natural images can be obtained even when output from the camera.

C1 setting: This mode uses Handheld High Res Shot to capture high-resolution astronomical photographs. Use a tripod or equatorial mount to take photos.

C2 setting: Drive mode is set to Single Shot. Image stabilisation is set to S-IS AUTO to support handheld shooting.

*Each setting can be changed/overwritten to suit the subject and photographer's preferences.

Shooting mode: C2 (Custom)

White Balance: 3000K, G+2 Tone Curve: Highlight +3 / Mid -3 / Shadow 0 Contrast: +2, Sharpness: -2

Shooting mode: M (Manual)

White Balance: Auto Tone Curve: Highlight 0 / Mid 0 / Shadow 0 Contrast: 0, Sharpness: 0

BMF-LPC01 // BMF-SE01

BMF-LPC01 Body Mount Light Pollution Filter

BMF-SE01 Body Mount Soft Filter

With body mount filter attached

Body mount light pollution cut filter BMF-LPC01 (The body mount filter is included with the E-M1 Mark III ASTRO and sold separately.)

Light pollution filters cut out light from artificial light sources such as city lights and street lamps. This prevents colour casts in the night sky, allowing you to capture the original beauty of nebulae and constellations more vividly. In addition, since the area near the horizon is most susceptible to light pollution, they are also effective when photographing constellations rising in the eastern sky or setting in the western sky.

When using a light pollution filter

When no light pollution filter is used

Body mount soft filter BMF-SE01 (The body mount filter is included with the E-M1 Mark III ASTRO and sold separately.)

The high-resolution M.ZUIKO DIGITAL lens forms a clear point image of stars, which are ideal light sources. On the other hand, because many stars are recorded as point images, representative stars may not look impressive. By using this soft filter, you can achieve the effect of blurring and emphasising point light sources, making brighter stars appear larger and more blurred, and the colours of the stars are also emphasised, making the stars and constellations stand out.

When using a soft filter

When no soft filters are used

Filter spectral characteristics

*This is an image diagram and does not guarantee the actual values.

Spectral characteristics graph of the built-in IR cut filter

It transmits almost 100% of not only Hα rays (656nm) but also SⅡ rays (672nm).

Spectral characteristics graph of the light pollution cut filter (BMF-LPC01)

It transmits nebular emission lines and effectively blocks emission lines of mercury (Hg) and sodium (Na), which are sources of light pollution.

Other useful features

Like the E-M1 Mark III, it is equipped with a variety of functions that are ideal for starry sky photography.

- Starry Sky AF: Focus on the stars

- Live Composite function ideal for shooting star trails

- Digital level for easy leveling even in dark environments

- Convenient for long-term shooting, USB power supply from USB/PD compatible devices

Technical specifications

E-M1 Mark III ASTRO + Body Mount Filter Set

Processor TruePic™ IX
Effective Resolution (approx.) 20.4 MP
AF System Dual FAST AF 121-point cross-type phase & contrast detection, Starry Sky AF, Face Priority/Eye Priority AF
Image Stabilisation Built-in 5-axis Up to 7.5 EV steps*
ISO Sensitivity AUTO ISO: Customisable, LOW (approx.64) ‐ 6400 Manual ISO: LOW (approx.64, approx.100), 200 - 25600
Flash Compatible with all OM SYSTEM / Olympus Flashes
Viewfinder Resolution Magnification / Coverage Electronic Viewfinder, approx. 2.36M dots Approx. 1.30x - 1.48x / Approx. 100% Field of View
Monitor 3.0 inch Vari-angle Touch LCD (approx. 1037k dots)

Open full list of technical specifications

E-M1 Mark III ASTRO + Body Mount Filter Set technical specifications

Processor TruePic™ IX
Effective Resolution (approx.) 20.4 MP
AF System Dual FAST AF 121-point cross-type phase & contrast detection, Starry Sky AF, Face Priority/Eye Priority AF
Image Stabilisation Built-in 5-axis Up to 7.5 EV steps*
ISO Sensitivity AUTO ISO: Customisable, LOW (approx.64) ‐ 6400 Manual ISO: LOW (approx.64, approx.100), 200 - 25600
Flash Compatible with all OM SYSTEM / Olympus Flashes
Viewfinder Resolution Magnification / Coverage Electronic Viewfinder, approx. 2.36M dots Approx. 1.30x - 1.48x / Approx. 100% Field of View
Monitor 3.0 inch Vari-angle Touch LCD (approx. 1037k dots)

Specifications
- Processor TruePic™ IX
- Effective Resolution (approx.) 20.4 MP
- AF System Dual FAST AF 121-point cross-type phase & contrast detection, Starry Sky AF, Face Priority/Eye Priority AF
- Image Stabilisation Built-in 5-axis Up to 7.5 EV steps*
- Construction Magnesium
- ISO Sensitivity AUTO ISO: Customisable, LOW (approx.64) ‐ 6400 Manual ISO: LOW (approx.64, approx.100), 200 - 25600
- Sequential Shooting Mechanical Shutter: 15fps S-AF, 10fps C-AF Electronic Shutter: 60fps S-AF, 18fps C-AF
- Top Shutter Speed Mechanical: 1/8000 sec Electronic (Silent): 1/32000 sec
- Customisable Buttons 14 Function Buttons
- RAW Capture Yes (12-bit lossless compression)
- Video Recording C4K: 24p 4K: 24p, 25p, 30p Full HD: 24p, 25p, 30p, 50p, 60p High Speed Movie: 1920x1080 (FHD) / 120fps
- Video Quality 4K, C4K, Full HD, High Speed Movie FHD
- Flash Compatible with all OM SYSTEM / Olympus Flashes
- Viewfinder Resolution Magnification / Coverage Electronic Viewfinder, approx. 2.36M dots Approx. 1.30x - 1.48x / Approx. 100% Field of View
- Monitor 3.0 inch Vari-angle Touch LCD (approx. 1037k dots)
- WiFi Function Yes
- GPS Yes (Smartphone connection)
- Tethered Shooting Yes (via USB cable / via WiFi)
- Technology Innovation Handheld Hi-Res, Live Composite, Live ND, Live Time, Tripod Hi-Res
- Weatherproof Dustproof, Freezeproof, Splashproof
- Microphone Built-in Stereo φ3.5 stereo mini jack for external
- USB Charging Yes
- USB PD bus power Yes
- Dimensions 134.1mm x 90.9mm x 68.9mm
- Weight (body only) 504g
- Box Contents E-M1 Mark III Camera, BMF-LPC01 Light Pollution Filter, BMF-SE01 Soft Filter, BLH-1 Lithium-Ion Battery, BCH-1 Battery Charger, CB-USB11 USB Cable, CC-1 USB Cable Clip, BC-2 Body Cap, EP-12 Eyecup, Shoulder Strap, Basic Manual, Warranty Card.
- Warranty (years) 1 year