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Denkmeier LOA 21 3D Eyepiece Pairs

Denkmeier LOA 21 3D Deep Immersion Eyepiece Pair

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    Estimated Arrival: Between Dec 02 and Dec 08. *ETA to USA Only

    Shipping & Returns: Free domestic shipping & 100% satisfaction guarantee. You can request a refund up to 30 days after delivery.

    See The Universe through your Binotron 27 in amazing and super realistic 3D! See The Universe with 6 depths. This innovation by Russ Lederman burst on the astro-scene in 2015 and now they are being used all over the world. If you have not looked through these, you have never seen M27 floating in front of the distant background stars or galaxies hanging deep in the distance BEHIND the Milkyway Stars.


    *Includes One LOA 21 with the 3D Lederman Optical Array (LOA) and one LOA 21 Neutral Eyepiece.

    In the LOA 21 3D Pair, only One eyepiece has the LOA (Lederman Optical Array). The other LOA 21 does not have the array and is called The Neutral. When used in a Binoviewer, this creates the 3D. So, when viewing The Moon, the eyepiece with the array is removed, and a second matched Neutral replaces it. Now, Lunar views are two eyed but conventional. The 3D interferes with Lunar viewing and is not recommended.



    65 Degree Widefield


    Fully multi-coated


    Fully machined anodized aluminum bodies & housings


    No grooves - holds alignment in the Binotron 27

    Eyecup material



    Array glass 1/10 wave flat fully multi-coated


    Cemented with a proprietary process


    We know that once you've placed your order, you are anxious to receive it! We make every effort to get your order shipped out to you as quickly as possible.

    As soon as you place your order, you will receive an order confirmation e-mail. This means that we have received your order in our system and pre-authorized your credit card for the purchase. We will process the charges to your credit card and your order will ship within five business days from the date of your order.  We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out.  If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at

    Standard shipping time in the US is between 3-5 business days, though it can vary slightly depending on the destination. For updates on your shipment, you can enter your tracking number here.

    We are happy to offer FREE domestic shipping on all orders! Unfortunately, at this time we are not able to provide expedited or international shipping.  

    Returns & Refunds

    We have a 30-day return policy, which means that in the case that your order arrives broken or defective, or if you simply change your mind about your purchase, you have 30 days after receiving your item to request a return. Returns requested after 30 days of receiving your order will not be accepted. Refunds will be issued to the original credit card that you use when placing your order.

    To be eligible for a return, your item must be in the same condition that you received it. 

    To start a return, please contact us at to receive a prepaid return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted. 

    We will notify you once we’ve received and inspected your return and at this point, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

    You can always contact us for any return questions at