Accessory
GSO RC .75x Reducer
GSO · RC .75x Reducer · field flattener / reducer
Key specifications
| Accessory type | Flattener/Reducer |
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| Back focus | 80 mm |
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| Factor | 0.75 × |
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All specifications
| Interface | 2" barrel; 2" compression-ring holder |
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| Compatible with | GSO and compatible Ritchey-Chrétien telescopes; sensors up to 15 mm diagonal |
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About
A two-element, fully multi-coated 0.75x focal reducer for GSO and compatible Ritchey-Chrétiens (f/8 to f/6, f/9 to f/6.75), for sensors up to 15 mm diagonal, with about 80 mm of back focus; it keeps the RC's field flatness but is not a flattener.