Zeiss Conquest HD 10x42 vs Nikon Monarch HG 8x30
Quick take: The Zeiss Conquest HD 10x42 costs $30 less; the Zeiss Conquest HD 10x42 reaches farther (10x vs 8x); the Nikon Monarch HG 8x30 has a wider field of view (435 vs 345 ft @ 1000 yds).
Field of view, to scale
Top-down view · drawn to true scale — no exaggeration
Which one to buy
A western hunter and a hiking birder would pick differently here, and the spec gap explains why. The Zeiss Conquest HD 10x42 is a 27.2 oz, 10x glass with a 4.2mm exit pupil. The Nikon Monarch HG 8x30 weighs 15.9 oz, shows a 435 ft field against 345 ft, and has ED glass and a field flattener, but its 30mm objectives give a 3.8mm exit pupil. The prices are close, $1,050 against $1,080, though Zeiss has discontinued the Conquest HD, so a new one may be hard to find and owners say remaining stock dried up quickly.
The Conquest's case is light and reach. Owners say it was repeatedly the brightest 10x42 in its class at last light, and rank its resolution alongside far pricier glass. Its weaknesses are physical: it is the heavy one in its peer group, its eye relief runs shorter in practice than its 16mm spec (Zeiss supplied longer eyecups free to owners), and its edges soften with some fringing off-center.
The Monarch HG 8x30 suits the opposite buyer. It weighs barely more than half as much, its wider field makes birds easier to find, and the field flattener should help edge sharpness. Its eye relief is 16.2mm. The cost is a smaller exit pupil, so it will not match the Zeiss when light fades. For dawn and dusk hunting, a Conquest HD found new or on closeout remains a strong buy; for all-day birding and travel, the Nikon is the more practical binocular.
Zeiss Conquest HD 10x42
For hunters who glass at first and last light and want 10x reach, if you can still find one new now that it has been discontinued.
Nikon Monarch HG 8x30
Best if you carry your binocular all day: at 15.9 oz with a 435 ft field and ED glass, it suits birding, hiking and travel in daylight.
| Spec | Zeiss Conquest HD 10x42 | Nikon Monarch HG 8x30 |
|---|---|---|
| Approx. price | ~$1,050 | ~$1,080 |
| Use case | Birding | Birding |
| Magnification | 10x | 8x |
| Objective | 42mm | 30mm |
| Exit pupil | 4.2mm | 3.8mm |
| Field of view | 345 ft @ 1000 yds | 435 ft @ 1000 yds |
| Eye relief | 16mm | 16.2mm |
| Close focus | 6.6 ft | 6.6 ft |
| Prism | Roof | Roof |
| Glass | HD | ED |
| Coating | Fully Multi-Coated | Fully Multi-Coated |
| Weight | 27.2 oz | 15.9 oz |
| Dimensions | 5.9 x 4.7 in | 4.7 x 5 in |
| Warranty | Limited Lifetime | Limited Lifetime |
Feature comparison
Zeiss Conquest HD 10x42
- ✓ED Glass
- ✓Phase-Corrected
- ✓Dielectric Coating
- ✓Waterproof
- ✓Fogproof
- ✗Image Stabilized
- ✓Tripod Adaptable
- ✗Magnesium Body
- ✓Locking Diopter
Nikon Monarch HG 8x30
- ✓ED Glass
- ✗Phase-Corrected
- ✗Dielectric Coating
- ✓Waterproof
- ✓Fogproof
- ✗Image Stabilized
- ✗Tripod Adaptable
- ✓Magnesium Body
- ✓Locking Diopter
What birders say
Zeiss Conquest HD 10x42
- ✓Superb low-light performance - in side-by-side hunting tests it was the brightest of its group with a crisper, more contrasted twilight image than similarly priced rivals
- ✓Razor-sharp center field from the HD lens system and SCHOTT glass - hunters who compared it directly said it 'easily beat' the Vortex Viper HD
- ✓Resolution that veteran multi-binocular owners rank alongside the Swarovski SLC - the closest sub-alpha to alpha-level detail retrieval
- ✓Fast, precise focus that snaps to distance - well suited to ranging between near brush and far hillsides
- ✓German build quality with a track record - a 2012-era design whose long-term owner reports are overwhelmingly reliable
- ✓Zeiss addressed the eye-relief complaint by supplying longer eyecups to Conquest owners free of charge
- ✓Discontinued status means real bargains - clearance and used pricing has dropped it well below the $1,000 class it used to define
- ✓LotuTec water-shedding coatings and lifetime US warranty make it a worry-free field binocular in rain and snow
- ✗Heaviest of its peer group at 27.2 oz - hunters who compared it to the Viper HD noted the Vortex was 'much lighter'
- ✗16mm eye relief runs practically shorter than spec - the most repeated gripe from eyeglass wearers, hence Zeiss's free longer-eyecup program
- ✗Stock eyecups drew specific criticism in comparisons - one hunter found the Viper's eyecups 'SO much better'
- ✗Edge-of-field softness, like the whole Conquest HD line - sharpness falls away in the outer 40% of the image
- ✗Visible chromatic aberration off-center on high-contrast subjects like antlers against snow or birds against sky
- ✗345 ft field of view is average - a Nikon Monarch HG 10x42 shows 362 ft
- ✗Non-locking diopter can get knocked out of setting in a pack or bino harness - fixed only in the HDX successor
- ✗Buying new is now a scavenger hunt; remaining stock dried up quickly after the 2024 discontinuation
Zeiss Conquest HD 10x42 vs Nikon Monarch HG 8x30: common questions
Can I still buy the Zeiss Conquest HD 10x42 new instead of the Nikon Monarch HG 8x30?▾
It has been discontinued, and owners say new stock dried up quickly after it was replaced by the Conquest HDX. Used and closeout units still appear. The Monarch HG 8x30 is a current model, so it is the easier one to buy new.
Which is better at dusk, the Conquest HD 10x42 or the Monarch HG 8x30?▾
The Conquest. Its 4.2mm exit pupil is larger than the Monarch HG 8x30's 3.8mm, and owners say it was repeatedly the brightest 10x42 in its class at last light. The Nikon's smaller objectives favor daylight use.
Is the Conquest HD 10x42 good with eyeglasses compared with the Monarch HG 8x30?▾
It is the Conquest's weak spot. Owners say its 16mm eye relief runs shorter in practice, enough that Zeiss supplied longer eyecups free. The Monarch HG 8x30 is rated at 16.2mm, so glasses wearers should try both, or check that a used Conquest includes the longer eyecups.