- 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
- 2â diagonal needed for visual
Two years ago, we released the very first Radian Telescope, The Radian 61 APO. Itâs time for the next big upgrade in Radianâs Evolution.

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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 OPTâs 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 2â threads for easy placement of your favorite filter⊠which we already know is of course your Radian Triad Ultra of course.

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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 âback-focusâ 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⊠Youâll never need them again.

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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 âFor Those Who Collect Light In The Darkâ.

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