Flattener + focal reducer 0,77x for Sky-Watcher Esprit 150 (SKU: SW-5418) finderscopes opinie

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0.77x Focal Reducer and Field Flattener for Sky-Watcher Esprit 150 (SKU: SW-5418) is a dedicated optical corrector designed specifically for the Sky-Watcher Esprit 150 refractor. It simultaneously reduces the focal length and corrects field curvature, making it an essential accessory for astrophotography.

Key features

• dedicated focal reducer and field flattener for the Sky-Watcher Esprit 150
• 0.77x focal reduction combined with improved field flatness
• increases telescope speed to f/5.4, reducing exposure times by approximately 68%
• wider field of view, particularly beneficial for deep-sky astrophotography
• three-element optical design ensuring high image quality
• fully illuminated image circle of 36 mm – suitable for APS-C sensors and usable with full-frame cameras
• FMC (Fully Multi-Coated) optics for improved light transmission and contrast
• integrated filter thread

Compatibility and configuration

• compatible with the Sky-Watcher Esprit 150 refractor
• camera connection via Sky-Watcher Canon EOS or Nikon adapters with M48 × 0.75 thread
• backfocus of 55 mm when used with the supplied M48 adapter
• after removing the adapter, an internal M71 × 1 thread is available with a maximum backfocus of 75 mm (for custom adapters)

Field of view (approx.)

• full-frame sensor: approx. 2.54 × 1.70°
• APS-C sensor: approx. 1.66 × 1.11°

Box contents

• 0.77x focal reducer with field flattener for Esprit 150

Technical specifications

• manufacturer: Sky-Watcher
• catalogue number / SKU: SW-5418
• reduction factor: 0.77x
• number of elements / groups: 3
• optical coatings: FMC (Fully Multi-Coated)
• backfocus: 55 mm
• housing: aluminium
• weight: 910 g
• warranty: 24 months