Kowa TSN-501 20-40x50 Angled Spotting Scope
- Objective Lens: 50 mm
- Weight: 14.08 pounds
- Dimensions: 9.5 × 5 × 2.8 inches
- Dimensions: 9.5 x 5 x 2.8 in
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A compact 50mm Kowa spotting scope suited to birding and general outdoor use rather than long-range low-light hunting.
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ASIN: B073YSL8T2Model: TSN-501Category: Spotting Scopes
Overview
Kowa's TSN-501 keeps things compact, pairing a 50mm objective lens with a body measuring about 9.5 by 5 by 2.8 inches, sized for portability over maximum light gathering.
Kowa's TSN series favors compact scope bodies over the larger 60 to 88mm models aimed at long-range hunting, positioning the TSN-501 closer to a travel or backyard birding tool. The 50mm objective keeps the package smaller and lighter than Kowa's bigger-bodied scopes.
- 50mm objective lens
- Compact 9.5 x 5 x 2.8 in body
- Kowa TSN series
- Model TSN-501
Who it's for
Birders and casual outdoor users who want a Kowa-branded scope without stepping up to a 60mm-plus model make the better match here; long-range hunters wanting maximum light gathering should look at a bigger objective.
Pros and cons
- Compact 50mm objective body
- Kowa optics brand reputation
- Smaller objective than dedicated hunting scopes
Performance notes
A 50mm objective is on the smaller side for spotting scopes, trading some low-light gathering for a more compact and portable body at about 9.5 inches long.
Specifications
| Brand | Kowa |
|---|---|
| Model | TSN-501 |
| Objective Lens | 50 mm |
| Weight | 14.08 pounds |
| Dimensions | 9.5 × 5 × 2.8 inches |
| Dimensions | 9.5 x 5 x 2.8 in |
Frequently asked questions
What size objective lens does the Kowa TSN-501 have?
50mm.
How big is the Kowa TSN-501 spotting scope?
About 9.5 x 5 x 2.8 inches.
Is the Kowa TSN-501 suited to long-range hunting use?
Its 50mm objective is smaller than dedicated long-range hunting scopes, so it fits birding and general outdoor use better.