The Telescope Authority
Since 1947

View Shopping Cart

Your Cart is Empty

Radian 75MM Petzval Refractor Telescope

Brand: Radian

SKU : RT-RAD75P

- Read
  • Available for Pre-order
Add to Wishlist

Got questions? Click for live chat


Estimated delivery January 2023

  • The Radian 75 APO Astrograph is a true space photography platform
  • FCD 100 glass
  • The Radian 75 is a true Petzval Imaging System which prevents any moving elements in the system
  • 2” diagonal needed for visual
  • Compatible with the Radian Telescopes 61 Electronic Focuser Upgrade
  • Also fits the Primaluce Sesto Senso 2 without any additional adapters

Product Details

  • Two years ago, we released the very first Radian Telescope, The Radian 61 APO. It’s time for the next big upgrade in Radian’s Evolution.

     

    Shot by Alex Hawkinson @gazingoutwards with Radian 75

    The Radian 75 APO Astrograph is a true space photography platform showcasing the imaging DNA that made the Radian 61 the fastest selling telescope in OPT’s 75 year history. We kept the what you loved about the 61, including the sleek flat black design, with thin multi-point mounting rings. We still include two dovetails (d-style and v-style) at no additional charge to ensure universal attachment to any mount. We kept the filter vault with 2” threads for easy placement of your favorite filter… which we already know is of course your Radian Triad Ultra of course.

     

    Shot by Alex Hawkinson @gazingoutwards with Radian 75

    From there we stepped back and took inventory of your feedback over the last two years and made improvements where you told us they were most needed on the Radian 61. For starters, we upgraded the glass type to FCD 100 industry standard optics. We slowed the optics down slightly to extend the focal length and provide even higher resolution, sharper images on target. The new 75 APO Astrograph offers the best image field correction in its class even for large full frame sensors, making wide field mosaics possible without deep crops of your images. Lastly, we believe that “back-focus” is a painful concept none of us should have ever had to learn in the first place, so we designed the Radian 75 as a true Petzval Imaging System which prevents any moving elements in the system. This allows for the full travel of your focuser to find focus without any back focus calculations at all. You can put the calipers and calculator away… You’ll never need them again.

     

    Shot by Alex Hawkinson @gazingoutwards with Radian 75

    The brand new exclusive Radian 75 APO Astrograph was designed from the ground up to elevate your space photography and give you the edge when it comes to image quality. Radian remains “For Those Who Collect Light In The Dark”.

     

    Shot by Alex Hawkinson @gazingoutwards with Radian 75

  • specifications

    Aperture75mm (3")
    Back Focus74 mm
    Corrected Image Circle44 mm
    Focal Length405mm
    Focal Ratiof/5.4
    Glass TypeFCD 100 Super ED
    Optical DesignPetzval
    Tube Diameter89 mm
    Tube Length386mm
    Tube Weight5.7 lb
  • included items

    • 75MM Petzval Refractor Telescope
    • Tube rings
    • V-style dovetail plate
    • D-style dovetail plate
    • Dust covers
    • Handle

Product Reviews