OLLIN Snapshot Bino Adapter Size 21 - Magnetic Eye Piece Adapter

In this review the OLLIN Snapshot Bino Adapter Size 21 is assessed for hunters and wildlife photographers who want a fast, repeatable method to attach a phone to binoculars. The bottom line: it is a focused accessory for users who already own compatible binoculars and the required Snapcase system, delivering instant magnetic alignment and a simple compression fit that removes fiddly mounting steps. For anyone who values speed in the field and consistent centering, this adapter removes a lot of the usual digiscoping setup friction.

Key Features

• Compatibility: Size 21 is specifically designed to fit older Swarovski EL and SLC models and select Sig Sauer and Kite Optics, so users with those instruments get a precise fit.
• Magnetic connection: The embedded magnetic array instantly links to the Snapcase for fast, repeatable phone alignment without manual centering.
• Patented self centering: The design reduces missed shots from alignment errors by guiding the phone into the correct optical position each time.
• Compression fit installation: The adapter slips on and off easily when needed, making it practical for short excursions or quick changes in the field.
• Durable construction: Molded from ABS plastic to resist outdoor conditions and light impacts while keeping weight low for handheld use.
• Digiscoping ready: Works as part of the Snapshot system to let hunters and observers capture distant subjects with minimal setup.

Who It's For

The OLLIN Snapshot Size 21 is best for hunters, birders, and wildlife photographers who already own compatible binocular models such as pre-2014 Swarovski EL or SLC, Sig Sauer Zulu6 HDX variants, or Kite APC and who plan to use the Snapshot Snapcase system. It is aimed at people who prioritize speed and repeatable alignment over a universal adapter that fits every optic.

Those who should look elsewhere include users with newer or incompatible binocular models or anyone seeking a multi-brand, adjustable adapter that covers a wide range of eyecups without requiring a separate Snapcase. If you do not have the Snapcase, this adapter alone will not complete a digiscoping setup.

Pros & Cons

Pros

• Instant magnetic mounting removes trial-and-error alignment and speeds up capture opportunities.
• Patented self centering reliably places the phone over the eyepiece for repeatable framing.
• Compression fit and ABS construction keep installation simple and the part weather resistant.
• Designed specifically for popular high-end binoculars, offering a tailored fit for those models.

Cons

• Requires the Snapcase magnetic phone case (sold separately) to function, so it is not a standalone adapter.
• Size 21 fits a limited set of binoculars and will not work with many newer or different eyepiece designs.

Specifications

Brand	OLLIN
Model size	Size 21
Compatibility	Swarovski EL (2013 & older), Swarovski SLC (2013 & older), Sig Sauer Zulu6 HDX, Zulu6 HDX Pro, Kite Optics APC
Required accessory	Snapcase magnetic phone case (sold separately)
Mounting method	Embedded magnetic array with patented self centering
Material	Durable ABS plastic

Our Verdict

The OLLIN Snapshot Bino Adapter Size 21 is a smart, value-minded choice for owners of the listed binoculars who already plan to use the Snapcase system. Its magnetic, self centering connection and lightweight ABS construction make it a practical field tool that saves time and reduces missed shots, though buyers must accept the requirement of the Snapcase and the limited compatibility list.

Frequently Asked Questions

Do I get everything needed to attach a phone?
Answer. No, the adapter requires the Snapcase magnetic phone case which is sold separately to connect to your phone.

Which binoculars fit Size 21?
Answer. Size 21 is made for certain models including older Swarovski EL and SLC (2013 and older), Sig Sauer Zulu6 HDX and HDX Pro, and Kite Optics APC.

Is the adapter weather resistant?
Answer. The adapter is constructed from ABS plastic for resistance to outdoor conditions, but standard care is recommended in heavy rain or extreme environments.