Celestron C11 Optical Tube Assembly CGE Dovetail

050234103695

Celestron

£3,159.99
£3,159.99
Tax included. Shipping calculated at checkout.

Fulfilled by Celestron

This item is fulfilled by Celestron UK. For more details, please see the panel below the product description.

Celestron C11 Optical Tube Assembly (CGE Dovetail) - 91036-XLT-CGL

Portable Power — Serious Light Gathering in a Manageable Size

The Celestron C11 OTA delivers outstanding deep-sky and planetary performance while remaining surprisingly portable. At just 24" long and 27.5 lb, it’s a telescope powerful enough for observatory-level results, yet practical enough for one person to transport and set up.

Designed for advanced visual observing and astrophotography, the C11 combines a long focal length, robust aluminum construction, Fastar compatibility, and Celestron’s premium StarBright® XLT coatings for bright, high-contrast views.

High Contrast • High Resolution • High Versatility

The 11" Schmidt-Cassegrain optical system excels across targets:

  • Sharp detail on the Moon and planets

  • Excellent planetary imaging potential at high magnification

  • Deep-sky reach for faint nebulae, clusters, and galaxies

  • Brighter images with shorter exposures thanks to XLT coatings

With its generous aperture and controlled optical design, the C11 balances performance with manageability perfectly.

Built for Imaging

Native f/10 provides image scale ideal for smaller deep-sky targets — and you can expand your options:

  • Fastar compatible for ultra-fast f/2 imaging

  • Pair with optional f/6.3 reducer for wider fields

  • Superb platform for planetary cameras and CMOS astrophotography

Fast, flexible, and future-proof.

Fastar Technology — Capture More, Faster

Remove the secondary mirror and attach a Fastar-compatible imaging system (sold separately) to shoot at f/2 directly at the primary mirror focus.

Benefits include:

  • Up to 25× shorter exposures

  • Wide-field deep-sky images in seconds

  • Incredible efficiency under light-polluted skies

StarBright® XLT — Maximum Light Transmission

Celestron’s premium coating system delivers:

  • Enhanced reflective mirror coatings

  • High-efficiency anti-reflection layers

  • High-transmission water-white corrector glass

Together, they deliver exceptional brightness, contrast, and color fidelity.

What’s Included

  • C11 Schmidt-Cassegrain optical tube

  • 40 mm eyepiece (70×)

  • 9×50 optical finderscope

  • 1.25" star diagonal

  • 1.25” visual back

  • CGE-style dovetail bar

Specifications

Optical design: Schmidt-Cassegrain
Aperture: 279.4 mm (11")
Focal length: 2800 mm • Focal ratio: f/10

Magnification (included eyepiece): 70×
Highest useful magnification: 660×
Lowest useful magnification: 40×
Limiting stellar magnitude: 14.7

Resolution:
• Rayleigh: 0.50" • Dawes: 0.42"

Light-gathering power: 1593× (vs. human eye)

Secondary obstruction:
• Diameter: 95 mm (34%) • Area: 12%

Optics: StarBright XLT coatings

Tube: Aluminum
Length: 610 mm (24")
Diameter: 312.4 mm (12.4")
Weight: 12.4 kg (27.5 lb)

Dovetail: CGE dovetail bar
Fastar compatible: Yes

Why Choose the C11 OTA?

✔ Serious performance without observatory-only bulk
✔ Outstanding planetary and deep-sky capability
✔ Imaging-ready and Fastar compatible
✔ Premium optical coatings for brighter results
✔ Ideal upgrade for ambitious astronomers

The C11 is the perfect step into true high-performance astronomy — while staying practical enough to take anywhere.

Solar Safety Reminder

Never observe the Sun without a securely fitted, certified solar filter. Permanent eye damage and equipment damage can occur.

Shipping Options

Fast & Reliable UK Delivery

We offer flexible delivery options across the UK, with free shipping available on qualifying orders.

  • FREE Next Working Day Delivery (Mon–Fri)
    On all orders £300 and over
  • FREE Express Delivery (1–3 Working Days)
    On orders £49.99 – £299.99
  • Express Delivery – £3.99
    On orders under £49.99
  • Standard Delivery (2–4 Working Days) – £2.99
    A great value option for smaller orders
  • Priority Shipping – £8.99
    A fully tracked, guaranteed delivery service, including Saturday delivery options

Order Fulfilment

Some items, as clearly stated on the product page, may be fulfilled directly by our partners or manufacturers. In these cases, your order will be shipped to you straight from the brand’s warehouse. This helps us provide a wider range of specialist equipment and may result in slightly different delivery times.

Returns Policy

If something isn’t right, we’ll always try to help.

  • Unused items in “as new” condition can usually be returned within the statutory cooling-off period
  • Please contact us before sending anything back so we can advise on the safest way
  • For unwanted items, return shipping is your responsibility, and original shipping may be deducted where applicable
  • If a product is faulty or damaged, we’ll arrange repair, replacement or refund in line with your consumer rights — and we’ll cover reasonable return costs

Telescope shipping is expensive, and specialist — avoidable returns really do impact our business, so we always encourage customers to ask questions before buying. We’re here to help you get it right first time.

Your statutory rights are not affected.

Fulfilled By Celestron

Celestron logo with orange and gray design on a white background

Products marked “Fulfilled by Celestron” are shipped directly from the manufacturer.

When you place an order with Welsh Astronomy Centre, the order is processed by us as normal. We then securely forward the order details to Celestron, who dispatch the item directly to your delivery address.

How it works

  • You place your order with Welsh Astronomy Centre
  • We process the order and send the fulfilment request to Celestron
  • Celestron ships the item directly to you

Mixed Orders

If your basket contains a mix of items:

  • In-stock items from Welsh Astronomy Centre will be shipped directly from us
  • Items marked “Fulfilled by Celestron” will be dispatched separately by the manufacturer

This means your order may arrive in separate deliveries.

Celestron C11 Optical Tube Assembly CGE Dovetail

£3,159.99

Questions about this product?
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Does it come with a warranty?

All our products are UK stock so come with manufacturers warranty

What happens if I don't like it?

We always want you to be happy with your purchase — so if you’re unsure, please ask us first. We’re always happy to give honest advice before you buy.

If the product arrives and you simply decide it isn’t for you, you can usually return it within the cooling-off period — as long as it’s unused, in perfect condition, and returned with all original packaging and accessories.

Because telescopes and optical equipment are large, delicate and expensive to ship, you’ll need to cover the cost of sending it back, and if we originally subsidised delivery, we may deduct our outbound shipping costs from your refund.

We’re a small specialist business, and unnecessary returns genuinely hurt us — so if you’re unsure at all, please talk to us first. We’d rather help you choose the right item than process a return.

How fast is shipping?

We aim to ship in-stock items as quickly as possible.

  • Most in-stock orders dispatch within 1–2 working days
  • Delivery usually takes 1–3 working days after dispatch (UK mainland)
  • Heavier / oversized items and special orders may take a little longer

You’ll receive tracking details as soon as your order is on its way.

Astronomy equipment often requires specialist packing and trusted couriers — we do this to keep your gear safe, not to slow things down. If you need something urgently, just ask and we’ll do our best.

What's the returns policy?

If something isn’t right, we’ll always try to help.

  • Unused items in “as new” condition can usually be returned within the statutory cooling-off period
  • Please contact us before sending anything back so we can advise on the safest way
  • For unwanted items, return shipping is your responsibility, and original shipping may be deducted where applicable
  • If a product is faulty or damaged, we’ll arrange repair, replacement or refund in line with your consumer rights — and we’ll cover reasonable return costs

Telescope shipping is expensive, and specialist — avoidable returns really do impact our business, so we always encourage customers to ask questions before buying. We’re here to help you get it right first time.

Your statutory rights are not affected.

What are your opening hours?

Monday: 9.00am - 5.00pm
Tuesday: 9.00am - 5.00pm
Wednesday: 9.00am - 5.00pm
Thursday: 9.00am - 5.00pm
Friday: 9.00am - 5.00pm
Saturday: 9.00am - 5.00pm
Sunday: Closed