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Celestron Dielectric Dual Fit Star Diagonal 2" With Twist Lock

Celestron Dielectric Dual Fit Star Diagonal 2'' With Twist Lock
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Celestron Dielectric Dual Fit Star Diagonal 2'' With Twist LockCelestron Dielectric Dual Fit Star Diagonal 2'' With Twist LockCelestron Dielectric Dual Fit Star Diagonal 2'' With Twist Lock
Celestron Dielectric Dual Fit Star Diagonal 2'' With Twist LockCelestron Dielectric Dual Fit Star Diagonal 2'' With Twist Lock
Price:  £205.00(Inc. 20% VAT)Earn 205 Loyalty Points
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Model:  93573
Brand:  Celestron

Availability:  

  

Generally In Stock, Please Confirm Before Ordering

2 Year Warranty On All New Items


New Product! Due late 2019. Back orders taken now


Upgrade your existing star diagonal with this premium Celestron 2" Dielectric Star Diagonal with Twist-lock ensures maximum light transmission without loss of optical quality. This star diagonal reflects the telescope’s light path 90° to provide a more comfortable viewing angle. In addition, the glass has 58 layers of dielectric coatings, which provide an over 99% reflective surface, delivering the maximum amount of light to the eyepiece.

All the diagonal’s mechanical parts are made of machined black anodised aluminium, except the twist lock rings, which are orange anodised for visibility. The interior of the barrel is glare threaded and painted flat black to prevent glare. This 2” star diagonal has the added benefit of allowing you to use larger 2” eyepieces with your telescope, providing a wider field of view, or standard 1.25” eyepieces with the step-down-adaptor.

This diagonal also comes with two interchangeable barrels to provide flexibility in connecting the diagonal to a wide variety of telescopes without the need for additional adaptors. For telescopes, like refractors, which accept 2” barrels in their focuser, a standard 2” barrel is included. For Schmidt-Cassegrains (SCTs) that use a threaded connection to the focuser, a barrel with SCT threads is included. Both barrels thread onto the diagonal housing, providing a secure connection to the diagonal.

With all its features and these high-end finishes, the Celestron Dielectric Star Diagonal, 2” with Twist-Lock is one of the highest quality 2" star diagonals that Celestron has ever offered.

Standard Star Diagonals vs Dielectric Star Diagonal

The key specifications for a star diagonal are its reflectivity and its optical quality. This diagonal delivers top performance in both categories, with an over 99% reflective mirror and diffraction-limited optical quality. This ensures that virtually all the light collected by the telescope will reach the eyepiece without the diagonal affecting optical performance. Using a lower quality star diagonal can both dim the view and degrade optical quality. You can enjoy better views from your telescope by simply swapping out its diagonal for a premium one, like the Celestron Dielectric Star Diagonal.

Twist-lock Holder

The twist-lock eyepiece holder secures any 2” eyepieces while keeping them centred in the diagonal, thus providing best opto-mechanical alignment between the telescope and eyepiece. Unlike traditional thumb screws, the twist-lock cannot scratch or engrave the barrel of your eyepieces. The twist-lock has an integrated 2” barrel stop that prevents 2” accessories with long barrels from damaging the mirror.

Specifications:

Diagonal size 50.8mm (2")
Diagonal type Mirror
Glass material BK7
Coatings Dielectric, 58 layers
Reflectivity Over 99%
Optical quality Diffraction limited
Eyepiece holder 2", Twist-Lock
2"-to-1.25" Step-down adaptor Included, Twist-Lock
Compression ring Yes, dual rings for 2" eyepiece holder and single ring for 1.25" step-down adaptor
Housing construction Machined aluminium black anodised
Barrels Comes with 2" barrel (for connection to 2" focusers) and SCT adaptor (for connection to SCTs)
Barrel interior Glare threaded and painted flat black
Threads for filters 2" barrel and 1.25" step-down adaptor have 2" filter threads
Dimensions 152.4mm x 76.2mm x 101.6mm (6" x 3" x 4")
Weight 19 oz (538.6 g) (with step-down adaptor)

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Some items that are showing as in stock are in stock at our holding warehouses, not at the shop. To double check the stock levels at the shop, please contact us on 01909774369 or sales@rothervalleyoptics.co.uk.

The delivery times for most items is 1 - 2 days but again, please double check stock levels on important orders before placing an order via the website.

The delivery costs for courier next day are for mainland UK only. If you live in the Scottish Highlands/Islands, Channel Islands or Northern Ireland, then a shipping surchage will apply. please contact us for prices. Smaller items can still go 1st class via Royal Mail.

Please note that if you are wanting to take advantage of our Saturday and Sunday timed services or next day pre 12 or pre 10:30 services, you MUST check that the stock is here at the shop before placing orders. Also, orders using the Saturday and Sunday services must be placed before 2pm the previous working day. Also, please remember to check that the stock is here at the shop before placing orders. If the stock is not at the shop, we won't be able to ship on any of the timed services. 

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If you have any questions regarding stock levels or delivery, please get in touch.

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Even if you collect most of your items from our shop, you can still order via the website and select the "shop collection" delivery option. Then you can come to our shop, collect your item and still get your points!

Please note this scheme is online only. Customers who order via the telephone can still be added to the scheme manually. Please ask for more details on this. Before placing orders online, please make sure you are registered with us first otherwise your points won't be allocated.

So happy shopping and if you have any questions about the scheme or any other queries, please get in touch.

Rother Valley Optics

01909774369
sales@rothervalleyoptics.co.uk

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Rother Valley Optics Ltd is registered in England and Wales 04762707. Registered Office: 21 Station Road, Kiveton Park, Rotherham, S26 6QP. Rother Valley Optics Ltd acts as a credit broker only. Rother Valley Optics Ltd are authorised and regulated by the Financial Conducts Authority. Credit provided subject to age and status..

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- - - Rother Valley Optics Ltd

01909 774 369
sales@rothervalleyoptics.co.uk