Lunt LS100MT ST 100/714 Ha B1800 All-round OTA

Professional 100 mm H-alpha telescope with maximum field of view for photography

The Lunt LS100MT ST 100/714 Ha B1800 All-round OTA is the choice for advanced solar photographers and observatories who want the widest possible H-alpha field of view without sacrificing contrast and resolution. With a 100 mm aperture, fully obstruction-free optics and a B1800 block filter, you get more room for large camera sensors and high magnifications, while fine filament structures and prominences remain in focus.

The difference in user comfort between B1200 and B1800 is great for photographers: less vignetting, more edge stability and a significantly wider sweet spot area across the sensor.

FPL-53 triplet optics: maximum sharpness and perfect correction

Whereas the 60 mm and 80 mm models use ED doublets, the LS100MT uses a full-scale FPL-53 triplet. This is comparable to the build quality of high-end APOs for deep-sky astrophotography.
The result:

• very low chromatic aberration
• Pointed stars in night mode
• maximum resolution in H-alpha

For serious solar observers, this is a clearly noticeable upgrade: fine spicule fields, filament sides and active regions show more internal structure and stability.

B1800 block filter: optimized for large sensors and bino viewers

The B1800 block filter with 18 mm aperture gives you a wider field of view than any of the smaller filter variants. It is ideal for:

• large camera sensors (APS-C, IMX571, IMX183, etc.)
• full-disk sun photography
• prominence photography with larger sensors
• binoviewers with higher magnification

For photo-based setups, this is the practical high-end choice.

Robust R&P focuser and full All-round equipment

The 2″ Rack & Pinion focuser with 1:10 micro fine adjustment carries heavy cameras and accessories with ease. The telescope comes in a sturdy transport case (78 × 33 × 23 cm), complete with sun finder, tube rings, handle and Vixen-style dovetail.
With a transport length of 650 mm, it remains surprisingly portable for a 100 mm H-alpha telescope.

What we recommend (including what you can see with it)

With the Lunt LS100MT Ha B1800 you can count on:

• ✓ wide and stable field of view without vignetting on large sensors
• ✓ very sharp prominences with internal structure
• ✓ clear filament layers, plages and active areas
• ✓ Visibly higher resolution than 60 mm and 80 mm systems
• ✓ use as a high-quality 100 mm APO for moon, planets and bright deep-sky objects (in night mode)
• ✓ perfect for advanced photographers, solar observatories and semi-professional use

The B1800 is ideal for photography-heavy setups. For purely visual use, the B1200 variant is usually sufficient, but the B1800 gives extra margin and future-proofing.

Specifications

Optics

• Type: Refractor
• Design: Solar H-Alpha
• Aperture: 100 mm
• Focal length: 714 mm
• Aperture ratio: f/7.1
• Resolution: 1.38″
• Boundary magnitude: 11.8
• Light output: 200×
• Max. useful magnification: 200×
• Lens Design: Triplet
• Glass material: OHARA FPL-53
• Coating: FMC
• Double Stack: no
• Blocking filter: B1800 (18 mm)
• Filter system: H-alpha
• Tube Material: Aluminum
• Tube weight: 6.8 kg
• Tube length: 840 mm
• Transport length: 650 mm

Focuser

• Design: Rack & Pinion
• Ocular connection: 2″
• Camera connector: T2
• Reduction: 1:10 fine adjustment

Mount

• Design: OTA
• Type of mount: without mount

Included accessories

• Sun Finder
• Dew cap
• B1800 block filter
• Solar filters
• Vixen-Style dovetail
• Handle
• Transport case
• Tube Rings

Application

• Astrophotography: yes
• Moon & Planets: yes (in night mode)
• Nature observation: no
• Nebulae & galaxies: yes
• Sun: yes
• Beginners: no
• Advanced: yes
• Observatories: yes