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GTD MOFOD MkIII Fork Friction Mount

GTD MOFOD MkIII Fork Friction Mount
Price:  £14,880.00(Inc. 20% VAT)Earn 14,880 Loyalty Points

Brand:  GTD



Generally In Stock, Please Confirm Before Ordering

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

The Gemini MOFOD MkIII Fork Mount is the ideal solution for demanding applications (public, school or transit observations). Our Modular Fork Design allows changing the OTA by sliding the fork arms in or out. MOFOD Fork Mount is the most stable observatory class mount with remote control.

Gemini MOFOD MkIII Fork Mounts have the following advantages over German Equatorial mounts

No counterweight needed – smaller inertia can be rotated faster.
No meridian flips needed – no lost time in real time observations.
No guider recalibration or field rotation needed.
No collision with the pier is possible – more safety in remote mode.

Forks were not as flexible to changing OTA as German Equatorial mounts. Our Modular Fork Design allows changing the OTA by simply sliding the fork arms out or in. Any compact telescope from 340-mm to 680-mm wide can ride this fork.

What is Modular Fork Design (MoFoD)?
Our MOFOD Fork Mounts are easily separated in 4 main parts: the RA base, the horizontal arm (tube) and the two fork arms. The orthogonality of the main axes is adjustable, ensuring maximum pointing precision.
Two persons can do the setup in 1 hour with a set of allen keys.

Tech talk
MoFoD is served by our proprietary ultra precise friction drive system with important advantages: silent and efficient operation means small ecological footprint, zero backlash means easy guiding combined with precise tracking, effective brake even without power means safety at all times. Longevity is guaranteed by high tech materials, reflecting in the 5 year warranty period.

To ensure precision in pointing and reliability in remote mode, high resolution encoders are fitted on both axes. The encoders have an absolute reference that enables the driver to find the home position after a blackout. The stepper motors have 0,1″ resolution.

The optional sliding weight inside the horizontal fork arm allows fine balancing the OTA for best operation. Coarse balancing is achieved by sliding both fork arms with the OTA in the correct direction.

Materials: Zink plated steel, powder coated (base), cast aluminium, 6082 aluminium (RA housing and shaft), stainless steel, (fork arms), roller bearings, stepper motors, high resolution optical encoders.
PE: cca 2” ptv in 30 minutes
Weight: RA base cca 50 kg, Horizontal arm cca 12 kg, Fork arms with drive cca 25kg.
Payload: 80 kg
Pier interface: D360-mm circular
Accepted OTAs: from 25 cm up to 50 cm (optics diam.) or multiple smaller instruments. The typical OTA for a fork is any Cassegrain variant (RC, DK, SC, MC) or a fast Newtonian. The fork has 600 mm free swing for the eyepiece end of the OTA. Max distance between Losmandy rails: cca 680mm (larger custom distance possible).
OTA interface: 3” Losmandy female ( rails supplied upon request)
NEW in 2020: new friction drivehead with subarcsecond precision tracking.

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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.

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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