Take 10% off all orders of $400 & up! Use code "HAPPYNEWYEAR" at checkout. Offer expires TONIGHT 1/22 at 11:59 PM EST

Double Stack Filter For Lunt 80mm & 100mm Modular Telescopes
Double Stack Filter For Lunt 80mm & 100mm Modular Telescopes

Double Stack Filter For Lunt 80mm & 100mm Modular Telescopes

  • Vendor
    Sale price
    Regular price
    Unit price
    Shipping calculated at checkout.


    Estimated Arrival: Between Jan 26 and Feb 01. *ETA to USA Only

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

    Current lead time is less than 2 weeks
    • Add an internal double-stacking module to the New Lunt LS80MT or LS100MT telescopse for a lowered bandpass of <0.5 Angstroms!
    • The SFPT Double Stack Unit includes a pressure tuner for true Doppler tuning.
    • Add the SFPT at the time of order, or add it to an LS80MT or LS100MT you already own, no trip back to the factory required!

    Double stacking provides a truly enhanced, high definition view of the Sun’s surface details. Notably, it lowers the bandpass of the system from <0.7 Angstrom to <0.5 Angstrom, which really makes the surface “pop”!

    The Lunt LS80MT and LS100MT can be internally double-stacked at the time of purchase or anytime thereafter.  Furthermore, neither telescope module will need to be returned to the factory for double-stacking.

    You can purchase the LS80MT or the LS100MT single stack modular telescope initially and add the SFPT to make it a double stack unit later.  This will make it more affordable to purchase our a new modular telescope and still have room for upgrades.  Once you upgrade your Lunt Modular Telescope with the double stack unit, you will be able to see the finer details not previously visible.



    7 lbs
    Dimensions 16 × 16 × 12 in
    Item Number


    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 info@telescopetek.com.

    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 returns@telescopetek.com 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 returns@telescopetek.com