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nPAE 1.25" Ruby Eyepiece Turret

nPAE 1.25'' Ruby Eyepiece Turret
Price:  £645.00(Inc. 20% VAT)Earn 645 Loyalty Points

Model:  nPAERB125
Brand:  nPAE



Generally In Stock, Please Confirm Before Ordering

2 Year Warranty On All New Items
(Excluding Batteries & Globes)

The long awaited 1.25″ turret is now here! Set up your whole equipmet stack and then spin the turret to quickly switch between them.

6 x 1.25″ eyepiece sockets
Parfocal locks
Dual position locks with removalable thumbscrews for outreach
1.25″ filters fit the threaded nose
1/4 wave mirror
5 axis cnc machined from 6083 aluminium
Weight: 911g / 2lbs

Manufacturer’s Review

The main feature of the nPAE Ruby Turret is that it effortlessly holds six 1.25” accessories. Shown here with a selection of #televue #skywatcher and #meade eyepieces you can rotate the turret in either direction to access the desired eyepiece. You can finally make use of all your eyepieces together! During those moments of good quality seeing you can swap for high magnification. Now you can switch between wide field and narrow field for nebulas and planets without having to change focus.

The second key feature of the Ruby Turret are the parfocal locks. This is the feature that keeps all the eyepieces in the same focal plane. Each lock has parfocal ring that can be adjusted to add between 0 to 6mm of additional backfocus, or the parfocal ring can detached to remove 5mm in one step. The back focus of the Ruby Turret is 96mm, so the parfocal ring can adjust that figure to between 102mm and 91mm.

The clamping mechanism of the Ruby Turret locks are via a brass compression ring which is closed with a thumbscrew AND an M4 flat point screw. They are 120° apart with the flat point screw towards the rear. This enables the outreach feature. Often, during high person usage, thumbscrews will come loose and even be fiddled with by curious fingers! With the Ruby Turret you can engage the flat point screws and remove the thumbscrews entirely so your eyepieces will remain secure throughout the event.

The centrepiece of all diagonals is of course the mirror. And the heart of the Ruby Turret is no less special than the rest. The key issues with an aluminised glass mirror is there is a dependency on coatings and the fragility of the glass. The Ruby Turret eliminates both these problems in one hit. Borrowing from the world of laser interferometry the Ruby Turret has a ¼ wave solid molybdenum mirror. Not only is the mirror incredibly flat, but any debate around what is the best coating is now mute as there is no need for coating with molybdenum being non-reactive with oxygen below 300 Celsius. Molybdenum is also super tough, drop the Ruby Turret and the last thing you’ll break is the mirror!

The nose filter thread is the feature that allows a filter to be attached to the Ruby Turret which will cover all the eyepieces. The thread will take most 1.25” filters, shown here with a green filter, looking out through the nose. Now you can add whatever your favourite filter is for the viewing session.

Like all nPAE products the Ruby Turret incorporates aircraft design engineering with 5 axis CNC machining. Made from 6083 aluminium which offers high tensile strength, high durability, anti-corrosion, dimensional accuracy and fine surface finish the Ruby Turret is elegant and sophisticated.

The final product is reached through a series of incremental steps beginning with software conceptual design, 3D plastic printing for prototyping before metal prototyping and finally a production prototype. Each stage saw ever tighter refinement until the faceted version you see today came into being.

The interlocking bezel halves allow fully integrated locks and the ability to open up the Ruby Turret to facilitate easy cleaning of the mirror. It’s a true stroke of design genius.

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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

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 1pm 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. 

Please note International customers will need to contact us for a shipping price prior to ordering via the website. We don't ship all items internationally. It is at our discretion what we ship outside of the UK. This all depends on the size and weight of the items. Please get in touch with us for any postage costs. Please note we do NOT ship telescopes or heavy items outside of the UK. This is due to massive postage costs and problems regarding returns.

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

Rother Valley Optics now have a loyalty point scheme active on the website. As you can see from the products, every item has a point value. Each pound you spend with us, you will receive 1 loyalty point. 1 point is worth 1p. You can accumulate these points as you shop with us, then when you are over £5, you can spend them on the website! Easy as that.

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


Finance is now available on most products above £250! We offer 12, 24, 36 and 48 months with a fixed 15.9% typical APR. Please note this can't be done through the website at this moment in time. You will need to email us or drop into the shop to sort out finance. As long as the item is above £250, finance is generally available!

Please note some items are NOT eligible for finance. Please contact us for eligibility first. 

Please get in touch with us today to find out if you're applicable.

You must be over 18 years to apply, live in the UK, have a valid UK bank account and not be bankrupt. Your credit file will be searched on application to see if you are eligible.

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..

If you have any questions about this, simply give us a ring or drop into the shop for a chat.

- - - Rother Valley Optics Ltd

01909 774 369