Lunt 0.8x Reducer and Field Flattener
Wider Fields And Flatter Frames For Imaging
This 0.8x reducer and flattener from Lunt does two jobs in one barrel. It shortens the effective focal length of your telescope by a factor of 0.8, which widens the field and speeds up the system for imaging, and it flattens the focal plane so stars and solar detail stay sharp out toward the corners of a large sensor.
The optics are multi coated and the housing is aluminum, so the unit stays light on the back of a focuser that may already be carrying a camera and filter wheel. Lunt lists it for use with the MT80, MT100 and MT130 optical tubes, and describes it as suited to any camera you choose to pair with it.
Back focus spacing is the thing to plan for. Reducers only deliver their rated factor and flat field at the correct distance from the sensor, so budget for spacer rings when you build the imaging train. If you are shooting the Sun, the reducer sits behind the telescope's own solar filtration and never replaces it.
Key Features
- Point Eight Reduction - cuts effective focal length to 0.8 of native, widening the field and shortening exposures.
- Field Flattener - corrects field curvature so detail stays sharp toward the corners of a large sensor.
- Multi Coated Optics - coated surfaces hold down internal reflection and scatter across the imaging train.
- Light Aluminum Body - a sturdy but light housing keeps the load low on the focuser draw tube.
- Modular Telescope Fit - listed by Lunt for the MT80, MT100 and MT130 optical tube assemblies.
- Camera Agnostic - described as working with any camera of your choice rather than one dedicated body.
| Specifications | |
|---|---|
| Type | 0.8x focal reducer and field flattener for astrophotography |
| Model / SKU | CAA-RF; listed on the Lunt storefront under SKU LS130-.8CAAFF |
| Reduction factor | 0.8x |
| Function | shortens effective focal length and flattens the focal plane |
| Optics | multi coated |
| Housing | sturdy lightweight aluminum |
| Listed telescope fit | Lunt MT80, MT100 and MT130 |
| Camera compatibility | stated as suitable for any camera of your choice |
| Element count | Not published |
| Clear aperture | Not published |
| Back focus distance | Not published |
| Thread and barrel size | Not published |
| Image circle | Not published |
| Solar safety | fits behind the telescope's certified solar filtration and is not itself a solar filter |
| Shipping weight | 1.0 lb |
| Warranty | 5 years from date of purchase, original purchaser, manufacturing and workmanship defects |
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