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Peterson EyeOpener II Visual Back

Peterson EyeOpener II Visual Back
 Peterson EyeOpener II Visual BackPeterson EyeOpener II Visual Back 
Price:  £76.59(Inc. 20% VAT)Earn 76 Loyalty Points

Model:  EYEP
Brand:  Peterson



Generally In Stock, Please Confirm Before Ordering

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

for Meade LX400ACF, RCX-400, LX200ACF, LX200R, LX200GPS, LX-90GPS, LX90 & LX200 Classic

An EyeOpener enhances the performance of long focal length 2" eyepieces on Meade 10”, 12" and 14” Schmidt-Cassegrain and Ritchey-Chrétien telescopes by increasing the eyepiece optical path size as much as 65%. 2" eyepieces are "where it's at". Get all of the eyepiece aperture that you paid for while enjoying the full benefit of 2" eyepieces.


As Schmidt-Cassegrain Telescopes (SCTs) evolved from 8-inch models to larger-aperture scopes, and as eyepieces evolved from 1¼" to 2", the "Schmidt-thread" couplings used for securing 1¼- inch diagonals and eyepieces to telescope backplates remained unchanged. This "Schmidt visual back" supplied with your RCX or LX200 scope has an internal diameter of 1½", and it functions as a 1½ inch-diameter field stop. This field stop effectively limits the performance of your costly 2" optics to the equivalent of 1½" optics. When using the 1½" visual back with Meade's 2" 56mm Plossel (an eyepiece with a full 2" of glass in the nose) you loose 65% of the light to your eye!

Low profile. Adds no additional back focus over the height of the original Meade visual back.

Do you think that the large diameter front lens (the "field lens") on your long focal length 2" eyepiece is there for decorative purposes? That's about what happens when you restrict the size of the optical path to that lens with a 1½ inch-diameter field stop. Without the EyeOpener® you're getting the equivalent of 1½" optics. You might as well take a piece of 1/4" wide masking tape and cover up the outside 1/4" of glass on the nose of your eyepiece.

How does it mount? The EyeOpener threads onto a 3-1/4" male thread found on the backplate of 10", 12" and 14" Meade SCT & RC scopes, providing a full 2" unrestricted optical path. The microfocuser attaches directly to the EyeOpener. Unscrew your 1-1/2"visual back and check it out for yourself. To use the EyeOpener on RCX400 or LX90GPS scopes and on the older "Classic" Meade SCTs, or to shorten the optical path by eliminating the Microfocuser you will need the EyeOpener 2" Tube Adapter. As an alternative, the EyeOpener will also allow LX90 and LX200 Classic SCT owners to retrofit a Meade #1209 Zero Image-Shift Microfocuser or JMI's NGF-S electric focuser.

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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