Kowa BD II XD 8x42 vs Kowa BD II XD 6.5x32
Quick take: The Kowa BD II XD 6.5x32 costs $90 less; the Kowa BD II XD 8x42 reaches farther (8x vs 6.5x); the Kowa BD II XD 6.5x32 has a wider field of view (525 vs 429 ft @ 1000 yds).
Field of view, to scale
Top-down view · drawn to true scale — no exaggeration
Which one to buy
For woodland birders, these Kowas sit on one scale: how much view you want and how much reach you'll give up for it. The Kowa BD II XD 6.5x32 sits at the far end, with 525 ft at 1000 yards, the widest field of any modern roof prism, a 4.3 ft close focus, and a low power that owners call effortlessly steady. The Kowa BD II XD 8x42 offers 429 ft, which its owners already count among the widest 8x42s, plus 8x reach and a 5.25mm exit pupil against 4.9mm.
One thing changes the math: Kowa has discontinued the 8x42. Owners rated it highly, with center fringing control better than anything near its price and a silky focus wheel that won a four-person group test, so a new one at $469 is still worth having if you find it. Otherwise its successor is the place to look, while the 6.5x32 remains available for $90 less.
The trade-offs are clear in owners' accounts. At 6.5x, distant raptors, shorebirds and sea-watching subjects look small, and some buyers never adjust to the image scale and go back to 8x. Some 6.5x32 units ship with focus slop or grit, and at 18.9 oz it is heavy for a 32mm, though still lighter than the 8x42's 22.6. Both soften toward the edge, the 8x42 in its outer quarter and the 6.5x32 well before the field stop, and the 8x42 can show veiling glare in strong side light.
As a single binocular for mixed habitat, an 8x42 is the safer choice. The 6.5x32 is the one owners call a perfect second binocular, and for forest birding, butterflies or shaky hands, arguably a first.
Kowa BD II XD 8x42
If you find one new at $469, a strong single binocular for mixed habitat; it is discontinued, though, so compare its successor before paying more.
Kowa BD II XD 6.5x32
For forest birding, butterflies and unsteady hands, or as a second binocular: the widest view in a modern roof prism, for $90 less.
| Spec | Kowa BD II XD 8x42 | Kowa BD II XD 6.5x32 |
|---|---|---|
| Approx. price | ~$469 | ~$379 |
| Use case | Birding | Birding |
| Magnification | 8x | 6.5x |
| Objective | 42mm | 32mm |
| Exit pupil | 5.25mm | 4.9mm |
| Field of view | 429 ft @ 1000 yds | 525 ft @ 1000 yds |
| Eye relief | 17mm | 17mm |
| Close focus | 5.9 ft | 4.3 ft |
| Prism | Roof | Roof |
| Glass | ED | ED |
| Coating | Fully Multi-Coated | Fully Multi-Coated |
| Weight | 22.6 oz | 18.9 oz |
| Dimensions | 5.5 x 5.0 in | 4.9 x 4.6 in |
| Warranty | Limited Lifetime | Limited Lifetime |
Feature comparison
Kowa BD II XD 8x42
- ✓ED Glass
- ✓Phase-Corrected
- ✓Dielectric Coating
- ✓Waterproof
- ✓Fogproof
- ✗Image Stabilized
- ✓Tripod Adaptable
- ✗Magnesium Body
- ✓Locking Diopter
Kowa BD II XD 6.5x32
- ✓ED Glass
- ✓Phase-Corrected
- ✓Dielectric Coating
- ✓Waterproof
- ✓Fogproof
- ✗Image Stabilized
- ✓Tripod Adaptable
- ✗Magnesium Body
- ✗Locking Diopter
What birders say
Kowa BD II XD 8x42
- ✓8.2-degree (429 ft) field of view - among the widest in the mid-price 8x42 bracket, level with the Monarch M7 and well ahead of the Terra ED
- ✓XD (fluorite-family) glass nearly eliminates chromatic aberration in the center - reviewers and owners consistently call fringing control better than anything near the price
- ✓Silky, precise focus wheel that group testers single out - in one forum shootout, all four participants independently picked the Kowa over the competing models
- ✓Lighter than the average 8x42 at about 22.6 oz, with a compact chassis that handles like a smaller binocular
- ✓Vivid, true-to-life color with delicate tonal shades - the 'looks more expensive than it is' comment appears constantly
- ✓Excellent close focus around 6 ft for butterflies and dragonflies
- ✓Kowa cut the price versus the original BD XD while improving the optics - street prices of $450-560 make it a repeated 'best value' pick from All About Birds and forum regulars
- ✓Solid, well-finished build with none of the plasticky feel common at this price - Kowa's scope-maker heritage shows
- ✗The wide field comes at a cost: edge sharpness falls off noticeably in the outer 25-30%, more than a Monarch M7 - the classic wide-angle trade-off
- ✗Veiling glare can appear in strong side or back light - a recurring observation in critical reviews at this price point
- ✗Chromatic aberration, while superb in the center, does creep in toward those soft edges
- ✗Eye relief is adequate (about 17mm) but the wide field means eyeglass wearers may vignette the extreme edges - try before relying on it with glasses
- ✗Eyecup click stops are on the light side and can be nudged off position
- ✗Brand recognition and dealer network are thin in the US compared to Nikon and Vortex - fewer places to handle one, slower resale
- ✗Warranty is a standard limited one, not the transferable no-fault coverage of Vortex or Maven
- ✗No flat-field optics - people upgrading specifically for edge-to-edge sharpness should look at the Conquest HDX class instead
Kowa BD II XD 6.5x32
- ✓A staggering 525 ft (10°) field of view — the widest of any modern roof-prism binocular, a spec forum reviewers note was previously only achieved by wide-angle porros
- ✓Big 4.9mm exit pupil plus low 6.5x magnification makes the view effortlessly steady and easy to get behind — no blackouts, no hunting for eye position
- ✓Owners praise the overall image: 'the combination of FOV, ease of view, sharpness, color, saturation is really quite nice'
- ✓Outstanding 4.3 ft close focus — one owner reported being 'very impressed' by how close it focuses, making it a genuine butterfly-and-dragonfly binocular
- ✓Fit and finish rated on par with Nikon's Monarch M7 series by forum reviewers — solid armor, decent eyecups, respectable build at the price
- ✓XD (ED) glass keeps chromatic aberration well controlled in the central field
- ✓17mm eye relief is generous for a wide-angle design and works with most eyeglasses
- ✓Exceptional value at around $350-380 — owners say it 'ticks all the boxes' for a compact low-power option with no direct competitor at any price
- ✗6.5x magnification is a reach handicap — distant raptors, shorebirds, and sea-watching subjects render small, and it can't replace an 8x or 10x for open country
- ✗Some units ship with focus wheel issues — owners describe 'a small amount of slop' and a 'gritty sensation while focusing'
- ✗The sweet spot doesn't cover the enormous field — edges soften noticeably, and one experienced birder found the sweet spot smaller than his Nikon MHG 8x30 with weaker contrast and saturation
- ✗At 535g (18.9 oz) it's heavier than most 32mm binoculars — a Nikon M7 8x30 is a couple of ounces lighter with more magnification
- ✗Made in China rather than Japan, which several buyers on forums flagged when comparing against Japan-built alternatives
- ✗An astronomy-forum thread titled 'flaw in design?' shows a minority of owners found edge performance below what professional reviews suggested
- ✗The 6.5x image scale takes real adjustment if you're used to 8x or 10x — some buyers bounce off it and return to conventional magnifications
- ✗Kowa's included accessories (case, strap, covers) are serviceable but basic for the price
Kowa BD II XD 8x42 vs Kowa BD II XD 6.5x32: common questions
Is the Kowa BD II XD 6.5x32 enough magnification to replace the BD II XD 8x42?▾
For woodland and backyard birding, owners of the 6.5x32 say yes, because the 525 ft field helps you find birds faster. For raptors, shorebirds and sea-watching it runs out of reach, and many owners keep it alongside an 8x42 or 10x42 rather than instead of one.
Which Kowa BD II XD works better with glasses, the 8x42 or the 6.5x32?▾
Both have 17mm of eye relief. Owners say the 6.5x32 works with most eyeglasses, while 8x42 owners note that spectacle wearers may lose the last sliver of its very wide field, so try either one first if you wear thick lenses.