Reducer / Corrector 0.77x for Esprit 120ED

Apochromatic refractor telescope owners Espirit 120ED can now image with a reduced focal length. Although the nominal f/7 focal length is not excessive, it is still appreciable to be able to reduce exposure times or increase signal-to-noise ratio (the focal length ratio then becomes f/5.4).

Characteristics

• Resulting focal length ratio (with Espirit 120ED): f/5.4
• Number of lenses: 3 (FMC - Fully Multi Coated multilayer treatment)
• Backfocus: 55mm
• Image circle corrected (for APS-C): 34mm
• Female thread for 2" filter: Included
• Thread (camera side): M48x0.75
• Thread (telescope side): M74x1