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Alstar f/6.3 Reducer & Field Corrector for Schmidt-Cassegrain Telescopes
✅ In stock
📉 Price recently dropped
D
Grade
Analysis Confidence
83%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Oct 16, 2026 11:01 AM · Prices & availability subject to change
Is This a Good Price on Amazon?
😐 Weak Deal- 😐Verdict: Weak Deal. Marginal discount. Prices may drop further soon.
- 💰The price is modestly below what this product ordinarily sells for.
- 🏷️The listed retail price is trimmed by 9% at checkout.
- 📉This is the most affordable price seen in roughly three months — a solid near-term opportunity.
- 📈The direction is downward at the moment; if that holds, an even better price may surface — though timing the market is never certain.
How We Scored This Deal
Price Competitiveness
7.9/28
Recent Value
4.03/22
Market Standing
10.67/20
Deal Strength
7/20
Momentum
10/10
📝 Product Overview
🏪 Sold by
Alstar Optics
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓Converts f/10 optical system to faster f/6.3 for a significantly wider field of view
✓Reducer shortens the effective focal length of Schmidt Cassegrain telescope optical system by 37 percent
✓This combination focal reducer and field corrector lens accessory works with all Celestron 5 inch; 6 inch; 8 inch; 9 1/4 inch; 11 inch and 14 inch Schmidt Cassegrain telescopes
✓Four element; fully multi coated optical design with 41 mm clear aperture
✓This clever accessory makes it possible to have a dual focal ratio instrument; without sacrificing image quality
⚙️ Specifications
Brand
A ALSTAR
Model Name
Alstar
Objective Lens Diameter
41 millimeters
Telescope Mount Description
Equatorial Mount
Product Dimensions
2.4"D x 2.9"W x 3.3"H
Focus Type
Manual Focus
Finderscope
Reflex
Item Weight
4.8 ounces
Compatible Devices
C5, C6, C8, C9.25, C11, C14
Lens Coating Description
Fully Multi-Coated
ASIN
B077GQ3JLX