Celestron – Focal Reducer & Field Corrector Imaging Accessory – Reduces Focal Length & Ratio 37% – f/10 to f/6.3 – Ideal for Deep-Sky Observing & Astroimaging – Works w/Schmidt-Cassegrain Telescopes

Features

• LIKE HAVING TWO TELESCOPES IN ONE: Your long focal length Schmidt-Cassegrain is well suited to lunar and planetary work. Add the Reducer Corrector and you have a short focal length telescope perfect for deep sky observing and astrophotography.
• REDUCES FOCAL LENGTH AND F/RATIO BY 37%: Simply thread the reducer onto your telescopes rear cell and an f/10 Schmidt-Cassegrain becomes f/6.3. An f/11 instrument becomes f/7.
• COMPATIBLE WITH ALL YOUR ACCESSORIES: Once the reducer is installed, you can add accessories like a T-Adapter, visual back, star diagonal or off-axis guider as usual.
• GREAT FOR TERRESTRIAL DIGISCOPING: The faster f/ratio allows you to shoot in dimmer lighting conditions and still properly expose your subject. This fully multi-coated lens provides maximum light transmission with near full-field illumination.
• UNBEATABLE WARRANTY & SUPPORT: Buy with confidence from Celestron, a leading telescope brand in California since 1960. Your purchase includes a 2-Year US Warranty and unlimited support from our team of US-based experts.

Description

Imagine having two telescopes in one — a long focal length instrument for lunar and planetary work and a short focal length scope for deep sky observing and astrophotography. With the Celestron Reducer/Corrector Lens, that’s precisely what you get. Explicitly designed for Celestron Schmidt-Cassegrain telescopes, this unique lens reduces your telescope’s focal length and f/ ratio by 37%, turning your long focal length telescope into a fast, short focal length instrument. A f/10 focal ratio now achieves a f/6.3, while an f/11 focal ratio now achieves a f/7. For visual use, this means you get lower power with the same eyepiece and a wider field of view. Photographically you also get a wider field and much shorter exposures. The Reducer/Corrector is easy to install by threading the unit onto the rear cell of your Schmidt- Cassegrain telescope (or the reducer plate of the C11 and C14). Once installed, you can add additional accessories like T-Adapters, 1.25” Visual Back, Star Diagonal, or Off-Axis Guider. The Reducer/Corrector can also be used for terrestrial digiscoping. The faster f/ratio allows you to use slower film or shoot in lower light level situations and still properly expose your subject. This fully multi-coated lens provides maximum light transmission with near full-field illumination. The lens is housed in machined aluminum for are machined aluminum black anodized. The internal surfaces are blackened and glare-threaded to provide the highest contrast. The lens has a knurled surface, providing a tremendous gripping surface for threading/unthreading.

Brand: Celestron

Model Name: Celestron f/6.3 Reducer/Corrector

Optical Tube Length: 105 Millimeters

Eye Piece Lens Description: Plossl

Objective Lens Diameter: 200 Millimeters

Telescope Mount Description: Equatorial Mount

Product Dimensions: 2"D x 2"W x 2"H

Focus Type: Manual Focus

Power Source: Not Obtainable

Finderscope: Reflex

Eye Piece Lens Description: Plossl

Mount: Equatorial Mount

Focus Type: Manual Focus

Power Source: Not Obtainable

Finderscope: Reflex

Compatible Devices: Celestron Schmidt-Cassegrain telescopes (C5, C6, C8, C9.25, C11, C14)

Coating: Fully Multi-Coated

Focal Length Description: The original focal length of the telescope, before using the reducer corrector, is not explicitly mentioned in the provided information. However, it can be inferred that for an f/10 system, the reducer corrector reduces the focal length by 37% to make it an f/6.3 system. Thus, if the focal length of the f/10 system is F, then the focal length after using the reducer corrector would be 0.63F (f/6.3). So, the original focal length of the telescope is F = 0.63F / 0.63 ≈ 1 focal length unit (FL), given that 1 FL is the focal length of the system after reduction.

Field Of View: 0.04 Degrees

Zoom Ratio: 7

Additional Features: Dual Focal Length Functionality

Optical-Tube Length: 105 Millimeters

Objective Lens Diameter: 200 Millimeters

Item Dimensions D x W x H: 2"D x 2"W x 2"H

Item Weight: 150 Grams

Exit Pupil Diameter: 31.75 Millimeters

Brand: Celestron

Model Name: Celestron f/6.3 Reducer/Corrector

Global Trade Identification Number: 54

Manufacturer: Celestron

UPC: 050234941754

Manufacturer Part Number: 94175

Model Number: 94175

Warranty Description: 2-YEAR WARRANTY

Built-In Media: Reducer - Corrector

Unit Count: 1.0 Count