• Product Image of Skywatcher 90º Erecting Prism for Refractor and SCT telescopes (1.25 Inch) 20377
  • Telescope eyepiece on a white background

Sky-Watcher 90º Erecting Prism for Refractor and SCT telescopes (1.25 Inch)

SKY20377

SkyWatcher

2 in stock
£44.00
£44.00
Tax included. Shipping calculated at checkout.

Order before 3pm for next day delivery

Sky-Watcher 90º Erecting Prism for Refractor and SCT Telescopes (1.25") - 20377

The Sky-Watcher 90º Erecting Prism is an essential accessory for refractors, Maksutov-Cassegrain, and Schmidt-Cassegrain telescopes, designed to deliver correctly oriented images. Ideal for terrestrial observations, this prism also provides a more comfortable viewing position by redirecting light at a 90º angle.

Key Features:

  • Correct Image Orientation: Produces a properly aligned image for terrestrial viewing, making it perfect for wildlife and landscape observation.
  • 1.25" Compatibility: Fits standard 1.25" eyepiece barrels and telescope focusers.
  • 90º Viewing Angle: Enhances viewing comfort by positioning the eyepiece at a convenient angle.
  • Fully-Coated Optics: Ensures high sharpness, contrast, and brightness for clear and vivid views.
  • Versatile Use: Suitable for refractor telescopes and catadioptrics, including Maksutov and Schmidt-Cassegrain models.
  • Durable Construction: Built to last with robust materials and precise optical alignment.

Ideal Applications:

  • Terrestrial Viewing: Achieve correctly oriented, high-quality views of landscapes, wildlife, and more.
  • Comfortable Astronomy: Provides a more natural and ergonomic viewing position for stargazing sessions.

Specifications:

  • Type: 90º Erecting Prism
  • Barrel Size: 1.25"
  • Compatibility: Refractor, Maksutov-Cassegrain, and Schmidt-Cassegrain telescopes
  • Optics: Fully-coated for optimal light transmission and image quality

The Sky-Watcher 90º Erecting Prism is a must-have for anyone looking to enhance their telescope's usability for terrestrial and casual astronomical viewing, providing sharp, correctly oriented images and ergonomic comfort.

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.
Sky-Watcher 90º Erecting Prism for Refractor and SCT telescopes (1.25 Inch)

£44.00

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