Neewer

Neewer 40100305 Metal Telescopic Mobile Phone Holder

4.1 (353 reviews)

Turn any telescope eyepiece into a smartphone astrophotography rig with a rock-solid metal adapter.

$28.99*
Check availability

*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

Affiliate Disclosure: Studio Supplies may earn a commission from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

Overview

The Neewer 40100305 Metal Telescopic Mobile Phone Holder is an afocal adapter that positions your smartphone camera directly over a telescope, spotting scope, or microscope eyepiece for through-the-lens photography. Built from aluminum alloy rather than the plastic found in most budget mounts, it provides the rigidity needed to maintain precise camera-to-eyepiece alignment — critical for capturing sharp images of the Moon, planets, or distant wildlife. The clamp accepts eyepieces from 26mm to 52mm outer diameter and phones from 53mm to 90mm wide, covering the vast majority of equipment combinations without requiring model-specific fittings.

In the field, this adapter earns its place by solving the fundamental problem of afocal astrophotography: keeping the phone camera centered and stable over the eyepiece. The dual lock-button system lets you secure the phone position and the eyepiece clamp independently, so adjusting one does not disturb the other. At 170g, it adds negligible weight to your setup, and the integrated 1/4"-20 thread means you can mount it on a tripod head for vibration-free exposures. Photographers working with spotting scopes for digiscoping birds or nature subjects will find it equally capable. The cold shoe mount is a thoughtful addition for attaching small accessories. This is a purpose-built tool for anyone who wants to capture what they see through an eyepiece without investing in a dedicated astro camera.

Key Features

Take telescopic photos with your phone: compatible with any telescope with an eyepiece outer diameter of 26 mm to 52 mm. With this telescopic phone mount, you can photograph Saturn, Jupiter or other astronomical objects with your smartphone

Impressive astrophotography photos: attach your mobile phone to a telescope and start taking photos of deep sky objects through the eyepiece with your phone

Universal phone holder: the phone holder has an adjustment range of 5.3 cm to 9 cm to hold a compatible phone securely in place, compatible with iPhone, Samsung and Sony phones, etc.

Easy to adjust: simply insert your phone into the phone holder, centre your phone's camera over the eyepiece, adjust the position of the phone holder based on the position of your phone camera and your phone size with the lock button of the phone holder and use the top lock button to secure it

Robust design: the holder is made of strong metal for improved durability

Specifications

Brand
Neewer
Model
ST-T01 (40100305)
Material
Aluminum Alloy
Phone Mount Width Range
53mm to 90mm (2.09" to 3.54")
Eyepiece Compatibility
26mm to 52mm outer diameter (1.02" to 2.05")
Dimensions
185 × 73.5 × 57mm (7.28" × 2.89" × 2.24")
Weight
170g (6.2 oz)
Mounting Options
Cold shoe mount, 1/4"-20 threaded hole
Color
Black

Pros & Cons

👍 Pros

  • Aluminum alloy construction provides rigid, wobble-free alignment that plastic adapters cannot match
  • 26-52mm eyepiece compatibility covers virtually every consumer telescope, spotting scope, and binocular
  • Built-in 1/4" thread and cold shoe mount add versatile attachment options for tripods and accessories
  • Compact 185 × 73.5 × 57mm footprint and 170g weight make it easy to keep in a gear bag permanently

👎 Cons

  • Phone clamp maxes out at 90mm, which excludes larger phones or devices in thick protective cases
  • Centering the phone camera over the eyepiece requires manual adjustment each time — there is no quick-release or indexed alignment system
  • No included eyepiece adapters or spacer rings for eyepieces at the extreme ends of the 26-52mm range
  • Metal-on-metal contact with eyepiece barrels may scratch softer coatings if overtightened

Frequently Asked Questions

It clamps onto eyepieces with outer diameters from 26mm to 52mm, which covers the vast majority of telescope, spotting scope, and binocular eyepieces on the market. Measure your eyepiece barrel before purchasing.
The all-metal construction and dual lock-button design hold the phone firmly once tightened. For exposures beyond a few seconds, vibration from wind or the mount itself is a bigger concern than slippage — pairing this with a remote shutter release or timer helps.
The phone clamp adjusts from 53mm to 90mm width. Most phones in slim cases will fit within this range, but bulky rugged cases may need to be removed. Measure your phone-plus-case width to confirm.
It works with any optic that has an exposed eyepiece in the 26-52mm diameter range — telescopes, spotting scopes, binoculars, monoculars, microscopes, and night vision scopes are all compatible.
The cold shoe lets you attach small accessories like a phone light, while the standard 1/4"-20 threaded hole allows you to mount the entire adapter on a tripod or other support for added stability during long observation sessions.