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Reducers, Correctors & Flatteners

4 Items
Apertura 0.75X Focal Reducer for Ritchey-Chretien

Apertura 2" Focal Reducer with 0.75X Reduction for Ritchey-Chretiens - A-RCR

SKU: APT-A-RCR
  • Apertura RC Reducer offers 0.75X reduction
  • f/8 RC's are reduced to f/6; f/9's transform to a scope with an effective focal ratio of f/6.75!
  • 2" barrel
  • 70mm - 80 mm focus distance from sensor to reducer thread
  • 15mm image circle
  • Reducer only, no flattening ability
Free shipping Free shipping
$119.95
Apertura 0.5x Focal Reducer - 1.25" and Extension Tube

Apertura 0.5x Focal Reducer - 1.25" - A-FR1

SKU: APT-A-FR1
  • Inexpensive 1.25" Focal Reducer by Apertura
  • 0.5X reduction
  • Apertura focal reducer comes with a 25mm extension
  • Fully multi-coated doublet in black anodized cell
$29.95
2" Photo & Visual Coma Corrector for Newtonian Telescopes

Apertura 2" Photo & Visual Coma Corrector for Newtonian Telescopes - A-COMA

SKU: APT-A-COMA
  • Significantly reduce the coma and field curvature on your Newtonian
  • Optimized for f/4.5 Newtonian telescopes
  • Works with f/3 to f/6 Newtonian's
  • Magnification factor of 1.1X, accepts 2" filters
  • Great for both visual and photographic use
  • Free shipping Free shipping
    $119.95

    Apertura Adjustable Flattener for 60EDR and 72EDR - FFADJ

    SKU: APT-FFADJ
    • 1X Flattener for Apertura 60EDR or 72EDR Refractors
    • The Apertura Flattener adjusts approximately 5 mm for proper backfocus
    • Accepts 48mm Wide T-Ring for DSLR (sold separately)
    • Full frame!
    Free shipping Free shipping
    $149.95