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Explore Scientific N208CF Newtonian Astrograph Edition N208CF-01

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$999.99
N208CF-01
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Explore Scientific N208CF Newtonian Astrograph Edition N208CF-01

Your Price:
$999.99
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Explore Scientific N208CF Newtonian Astrograph Edition N208CF-01 


Product Description

The Explore Scientific N208CF Newtonian - Astrograph Edition offers large aperture and super-wide field at f3.9. Field tested and updated by astrophotographers, this 208mm f/3.9 Newtonian produces tight, round stars with the recommended HR Variable Coma Corrector. This telescope assembly with its Carbon Fiber tube has very low expansion characteristics to hold its focus position, is also very lightweight, and a lightweight telescope performs better on any mount that it is placed on.

The very fast f-ratio f/3.9 Parabolic Newtonian with Borosilicate Secondary and Low Expansion H-PZ33 Primary Mirror optics provides a focal length of 812mm. The already very bright visual images is further enhanced with 97% reflectivity EMD coatings. No-tool 3-point push-pull collimatable secondary holder adjustments and no tool adjustments for the "clipless" primary mirror holder cell have locks to keep optics aligned for the best images.

Precise focusing is achieved with the Two Speed 2-inch Rack & Pinion Focuser with 50mm Extension Tube, and 1.25-inch Adapter.

Other features include a finder scope base to mount an optional correct image Explore Scientific 8x50 Illuminated Polar Right Angle Finder Scope or the correct image Explore Scientific 8x50 Straight Through Illuminated Viewfinder.

The Explore Scientific N208CF Newtonian is handled and supported by metal Cradle Rings with a contoured metal Handle/Grip that is slotted to allow a 1/4x20 attachment bolt for piggyback attachment of a DSLR. The 45mm Wide, 203mm Long Dovetail Plate (Vixen-style) mounts to fit a huge range of mounts from Explore Scientific and other brands. This dovetail plate has adjustment bolts with locks to adjust for precision cone angle adjustments.

The package includes a padded, top-loading Soft Carrying Case to protect the optical tube assembly while transporting the instrument to your backyard or your favorite dark sky site for an imaging run or deep sky visual observations.

The Science Behind the N208CF Newtonian - Astrograph Edition

Sir Isaac Newton invented the first functional reflecting telescope, called the "Newtonian Telescope" in 1668. Newton built his reflecting telescope because he suspected it could prove his theory that white light is composed of a spectrum of colors. Newton theorized correctly that a mirror lens would not split white light into a spectrum of colors "called chromatic aberration", like refractive lenses do. The reason that simple refractive lenses split white light into separate colors is that the image forming lens is tapered on all sides, effectively creating a triangular prism at the edges of the lens and thus disperses white light into its spectral components creating a rainbow of colors (red has a shorter wavelength than violet) because the light is deflected by the prism at different angles. Newton's experiments led us to have a greater understanding of the characteristics of the electromagnetic spectrum.

Since Newton's time there have been advances in refractor optics to nearly eliminate chromatic aberration (see Explore Scientific Air-Spaced Triplet ED APO Telescopes) . But the Newtonian reflector telescope has no such aberration.

Product Specifications

Item Number N208CF-01
Parabolic primary Mirror Diameter 208mm
Secondary Mirror Diameter (M.A.) 72mm
Focal Length 812mm
Focal Ratio f/3.9
Resolving Power .6 arc seconds
Optical Tube Assembly Weight with rings 19.1lb
Dovetail Plate 45mm Wide (Vixen-style)
Material Primary mirror Special low expansion H-PZ33
Material Secondary mirror Borosilicate-glass with low thermal expansion, individually matched to main mirror

Warranty

One Year Warranty

CA Residents: Prop 65 Warning(s) 
Shipping
 Scope Department FREE SHIPPING on all orders delivered within the contiguous United States. If your order is in stock and we process the charges to your credit card, our goal is to ship your order out within the timeframe specified on the product page. This is located near the top of the product page below the product price. If we foresee potential delays beyond this shipping window, we will reach out to you directly to inform you. If for some reason you have not received your shipment within a reasonable timeframe or have not heard from us, feel free to reach out at info@scopedepartment.com Expedited shipping is available for an additional cost on some products. Give us a call at 833-7scope or email us at info@scopedepartment.com and we will get back to you as soon as possible with a quote. Orders shipped to Alaska and Hawaii will incur freight charges and the shipping fees for those deliveries are the responsibility of the customer. Shipping charges are calculated after the order is submitted, so your order will be placed on hold until we can reach you by phone to confirm pricing 
Delivery

Estimated between  and

Will usually ship within 1 business day.

   

Please allow 10 days for your order to arrive. We source products from all over the world to bring you epic offers and the lowest prices. This means sometimes you have to wait a little longer to get your order but it's always worth it!

Returns are easy, simply contact us for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap!

Here are 5 more great reasons to buy from us:

   

We Put Our Customers First to us. If it doesn't fit, it breaks, you've changed your mind or for no reason whatsoever simply send it back to us and we'll cheerfully refund you every cent.

Returns are easy, simply contact us for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap!

In the unlikely event that you find your item cheaper at another online store, just let us know and we'll beat the competitor's pricing hands-down.

We insist that you love everything you buy from us. If you're unhappy for any reason whatsoever, just let us know and we'll bend over backwards to make things right again.

Ordering from Shoptimized is 100% safe and secure so you can rest easy. Your personal details are never shared, sold or rented to anyone either.

Explore Scientific N208CF Newtonian Astrograph Edition N208CF-01 


Product Description

The Explore Scientific N208CF Newtonian - Astrograph Edition offers large aperture and super-wide field at f3.9. Field tested and updated by astrophotographers, this 208mm f/3.9 Newtonian produces tight, round stars with the recommended HR Variable Coma Corrector. This telescope assembly with its Carbon Fiber tube has very low expansion characteristics to hold its focus position, is also very lightweight, and a lightweight telescope performs better on any mount that it is placed on.

The very fast f-ratio f/3.9 Parabolic Newtonian with Borosilicate Secondary and Low Expansion H-PZ33 Primary Mirror optics provides a focal length of 812mm. The already very bright visual images is further enhanced with 97% reflectivity EMD coatings. No-tool 3-point push-pull collimatable secondary holder adjustments and no tool adjustments for the "clipless" primary mirror holder cell have locks to keep optics aligned for the best images.

Precise focusing is achieved with the Two Speed 2-inch Rack & Pinion Focuser with 50mm Extension Tube, and 1.25-inch Adapter.

Other features include a finder scope base to mount an optional correct image Explore Scientific 8x50 Illuminated Polar Right Angle Finder Scope or the correct image Explore Scientific 8x50 Straight Through Illuminated Viewfinder.

The Explore Scientific N208CF Newtonian is handled and supported by metal Cradle Rings with a contoured metal Handle/Grip that is slotted to allow a 1/4x20 attachment bolt for piggyback attachment of a DSLR. The 45mm Wide, 203mm Long Dovetail Plate (Vixen-style) mounts to fit a huge range of mounts from Explore Scientific and other brands. This dovetail plate has adjustment bolts with locks to adjust for precision cone angle adjustments.

The package includes a padded, top-loading Soft Carrying Case to protect the optical tube assembly while transporting the instrument to your backyard or your favorite dark sky site for an imaging run or deep sky visual observations.

The Science Behind the N208CF Newtonian - Astrograph Edition

Sir Isaac Newton invented the first functional reflecting telescope, called the "Newtonian Telescope" in 1668. Newton built his reflecting telescope because he suspected it could prove his theory that white light is composed of a spectrum of colors. Newton theorized correctly that a mirror lens would not split white light into a spectrum of colors "called chromatic aberration", like refractive lenses do. The reason that simple refractive lenses split white light into separate colors is that the image forming lens is tapered on all sides, effectively creating a triangular prism at the edges of the lens and thus disperses white light into its spectral components creating a rainbow of colors (red has a shorter wavelength than violet) because the light is deflected by the prism at different angles. Newton's experiments led us to have a greater understanding of the characteristics of the electromagnetic spectrum.

Since Newton's time there have been advances in refractor optics to nearly eliminate chromatic aberration (see Explore Scientific Air-Spaced Triplet ED APO Telescopes) . But the Newtonian reflector telescope has no such aberration.

Product Specifications

Item Number N208CF-01
Parabolic primary Mirror Diameter 208mm
Secondary Mirror Diameter (M.A.) 72mm
Focal Length 812mm
Focal Ratio f/3.9
Resolving Power .6 arc seconds
Optical Tube Assembly Weight with rings 19.1lb
Dovetail Plate 45mm Wide (Vixen-style)
Material Primary mirror Special low expansion H-PZ33
Material Secondary mirror Borosilicate-glass with low thermal expansion, individually matched to main mirror

Warranty

One Year Warranty

CA Residents: Prop 65 Warning(s) 
Shipping
Scope Department FREE SHIPPING on all orders delivered within the contiguous United States. If your order is in stock and we process the charges to your credit card, our goal is to ship your order out within the timeframe specified on the product page. This is located near the top of the product page below the product price. If we foresee potential delays beyond this shipping window, we will reach out to you directly to inform you. If for some reason you have not received your shipment within a reasonable timeframe or have not heard from us, feel free to reach out at info@scopedepartment.com Expedited shipping is available for an additional cost on some products. Give us a call at 833-7scope or email us at info@scopedepartment.com and we will get back to you as soon as possible with a quote. Orders shipped to Alaska and Hawaii will incur freight charges and the shipping fees for those deliveries are the responsibility of the customer. Shipping charges are calculated after the order is submitted, so your order will be placed on hold until we can reach you by phone to confirm pricing   
Delivery

Estimated between  and

Will usually ship within 1 business day.

   

Please allow 10 days for your order to arrive. We source products from all over the world to bring you epic offers and the lowest prices. This means sometimes you have to wait a little longer to get your order but it's always worth it!

Returns are easy, simply contact us for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap!

Here are 5 more great reasons to buy from us:

   

We Put Our Customers First to us. If it doesn't fit, it breaks, you've changed your mind or for no reason whatsoever simply send it back to us and we'll cheerfully refund you every cent.

Returns are easy, simply contact us for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap!

In the unlikely event that you find your item cheaper at another online store, just let us know and we'll beat the competitor's pricing hands-down.

We insist that you love everything you buy from us. If you're unhappy for any reason whatsoever, just let us know and we'll bend over backwards to make things right again.

Ordering from Shoptimized is 100% safe and secure so you can rest easy. Your personal details are never shared, sold or rented to anyone either.

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