# Nikon Monarch Fieldscope 20-60x82 ED vs Kowa TSN-99A Prominar: specs and price compared

A sourced, side-by-side comparison of the Nikon Monarch Fieldscope 20-60x82 ED (Nikon) and Kowa TSN-99A Prominar (Kowa) among spotting scopes. Nikon Monarch Fieldscope 20-60x82 ED is the cheaper of the two at $1699.95.

## Side by side

| Spec | Nikon Monarch Fieldscope 20-60x82 ED | Kowa TSN-99A Prominar |
| --- | --- | --- |
| US price | $1699.95 | $4499 |
| Brand | Nikon | Kowa |
| Objective lens (mm) | 82 | 99 |
| Magnification range | 20-60x | 30-70x |
| Glass type | ED | fluorite |
| Viewing angle | both | angled |
| Field of view ft1000yd | 111 | 105 |
| Close focus (ft) | 16.4 | — |
| Eye relief (mm) | 16.1 | 17 |
| Waterproof | Yes | Yes |
| Nitrogen purged | Yes | Yes |
| Length (in) | 13.1 | — |
| Weight (oz) | 57.8 | — |

## Key differences

- Objective lens (mm): Nikon Monarch Fieldscope 20-60x82 ED 82 vs Kowa TSN-99A Prominar 99
- Magnification range: Nikon Monarch Fieldscope 20-60x82 ED 20-60x vs Kowa TSN-99A Prominar 30-70x
- Glass type: Nikon Monarch Fieldscope 20-60x82 ED ED vs Kowa TSN-99A Prominar fluorite
- Viewing angle: Nikon Monarch Fieldscope 20-60x82 ED both vs Kowa TSN-99A Prominar angled
- Field of view ft1000yd: Nikon Monarch Fieldscope 20-60x82 ED 111 vs Kowa TSN-99A Prominar 105
- Eye relief (mm): Nikon Monarch Fieldscope 20-60x82 ED 16.1 vs Kowa TSN-99A Prominar 17

## Sources

- Nikon Monarch Fieldscope 20-60x82 ED: https://www.nikonusa.com/p/monarch-fieldscope-82ed-a-with-mep-20-60/16101/overview (nikonusa.com, verified 2026-07-11)
- Kowa TSN-99A Prominar: https://kowaoptics.com/products/tsn-99a-prominar-spotting-scope-angled-body-only (kowaoptics.com, verified 2026-07-11)

Canonical: https://frontdeskreview.com/gear/spotting-scopes/nikon-monarch-20-60x82-ed-vs-kowa-tsn-99a-prominar/
Cite: Per The Front Desk Review, Nikon Monarch Fieldscope 20-60x82 ED ($1699.95) vs Kowa TSN-99A Prominar ($4499) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/spotting-scopes/nikon-monarch-20-60x82-ed-vs-kowa-tsn-99a-prominar/
License: CC BY 4.0.