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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
Celestron Basic Smartphone Adapter, 1.25”
Celestron Basic Smartphone Adapter, 1.25”
Celestron Basic Smartphone Adapter, 1.25”
Celestron Basic Smartphone Adapter, 1.25”
Celestron Basic Smartphone Adapter, 1.25”
Celestron Basic Smartphone Adapter, 1.25”
Celestron Basic Smartphone Adapter, 1.25”
Celestron Basic Smartphone Adapter, 1.25”
Celestron Basic Smartphone Adapter, 1.25”
Celestron Basic Smartphone Adapter, 1.25”
Celestron Basic Smartphone Adapter, 1.25”
Celestron Basic Smartphone Adapter, 1.25”
Celestron Basic Smartphone Adapter, 1.25”
Celestron Basic Smartphone Adapter, 1.25”
Celestron Basic Smartphone Adapter, 1.25”
Celestron Basic Smartphone Adapter, 1.25”
Celestron Basic Smartphone Adapter, 1.25”

Celestron Basic Smartphone Adapter, 1.25”

by Celestron
SKU CEL-81035
$20.95 - $20.95
$20.95
$20.95 - $20.95
$20.95
Price Match Policy!
  • Connects smartphones to eyepieces with a 29mm - 45mm outer diameter
  • Securely holds phones from 56mm to 97mm wide
  • Enables afocal photography (digiscoping) through telescopes, binoculars, and more
  • Durable cast metal frame weighs just 6 oz (170.1 g)
  • Simple, manual adjustment for quick setup in the field
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Celestron Basic Smartphone Adapter, 1.25”

    The Celestron Basic Smartphone Adapter turns your optic into an imaging system, connecting phones from 56mm to 97mm wide to any eyepiece with an outer diameter between 29mm and 45mm. This simple, 6 oz cast metal adapter is a straightforward tool for capturing images of the Moon, wildlife, or microscope specimens directly through your eyepiece. Its closed dimensions of 177.8mm x 101.6mm x 38.1mm make it a compact addition to any field kit.

    Fits Eyepieces from 29mm to 45mm in Diameter

    This adapter's core function is its ability to clamp securely onto a wide range of optics. The eyepiece clamp accommodates any eyepiece with an outer diameter from 29mm to 45mm, a range that includes most standard 1.25" telescope eyepieces, as well as the eyepieces found on many binoculars, spotting scopes, and microscopes. A simple thumb screw mechanism tightens the clamp for a firm, reliable grip on the eyepiece, ensuring your phone stays aligned.

    A 56mm to 97mm Clamp for Modern Smartphones

    Designed for modern devices, the phone clamp adjusts from 56mm to 97mm wide. This range accommodates the vast majority of current smartphones, even many larger "plus" or "max" sized models. Tightening knobs lock the phone securely in place, so you can focus on aligning the camera with the eyepiece without worrying about the device slipping. Note that bulky, folio-style cases may need to be removed to ensure a proper fit.

    6 oz Cast Metal Body with Manual Alignment

    Built for durability and ease of use, the adapter features a cast metal frame that weighs only 6 oz (170.1 g), adding minimal weight to your setup. Adjustments are entirely manual, providing a simple, hassle-free way to position your phone's camera over the eyepiece. Once aligned, you can capture images and video, or even text a photo to a friend, all while the phone remains mounted to your optic.

  • Will the Celestron Basic Smartphone Adapter fit my 1.25" and 2" telescope eyepieces?

    It is designed for eyepieces with an outer diameter between 29mm and 45mm. This covers most 1.25" eyepieces. However, it is generally not compatible with 2" eyepieces, as their outer housings are typically much larger than 45mm.

    Can this adapter hold a large phone like an iPhone Pro Max or Samsung Galaxy Ultra?

    Yes. The phone clamp has a range of 56mm to 97mm (2.20" – 3.81"). Most large flagship phones fall within this range, but you should measure your phone's width (with its case, if you intend to use one) to confirm it will fit.

    Do I need to remove my phone case to use the Celestron Basic Smartphone Adapter?

    It depends on the case. While the adapter can accommodate many standard cases, very large or bulky ones (especially folio-style cases that cover the screen) may prevent the phone from fitting securely in the clamp and should be removed before use.

    Is it difficult to align my phone's camera with the eyepiece?

    Alignment is a manual process. The simplest method is to turn on your phone's camera, hold the phone in the clamp over the eyepiece, and move it until you see the circular image from the eyepiece centered on your screen. Once you find the spot, tighten the clamp onto the eyepiece.

    Can I use this adapter for imaging the Sun through my telescope?

    Absolutely not, unless you have a proper, full-aperture solar filter designed specifically for your telescope installed over the front of the optic. Never look at the Sun or point an unfiltered optic at the Sun. Doing so can cause permanent damage to your eyes, your camera, and your telescope.

    What kind of optics is the Celestron Basic Smartphone Adapter compatible with?

    This adapter is compatible with a wide range of instruments, including most telescopes, binoculars, spotting scopes, monoculars, and microscopes, as long as their eyepiece has an outer diameter between 29mm and 45mm. It is not designed for use with riflescopes.

  • Compatible Optics Telescopes, Binoculars, Spotting Scopes, Monoculars and Microscopes
    Eyepiece Clamp Style Thumb screw Hex shape
    Eyepiece Clamp Range 29mm - 45mm (1.14" - 1.77")
    Phone Clamp Style Thumb screw adjusting
    Phone Clamp Range 56mm - 97mm (2.20" – 3.81")
    Fine Adjustment Style Manually (no slow motion controls)
    Materials Cast Metal
    Dimensions (Closed) 177.8mm x 101.6mm x 38.1mm (7" x 4" x 1.5")
    Weight 6 oz (170.1 g)
    Solar Warning Never use without a proper solar filter. See manual for details.

    • Celestron Basic Smartphone Adapter, 1.25”

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  • Celestron 2-Year Warranty