Zeiss Conquest HD 10x42 vs Zeiss Conquest HDX 8x42
Quick take: The Zeiss Conquest HDX 8x42 costs $50 less; the Zeiss Conquest HD 10x42 reaches farther (10x vs 8x); the Zeiss Conquest HDX 8x42 has a wider field of view (384 vs 345 ft @ 1000 yds).
Field of view, to scale
Top-down view · drawn to true scale — no exaggeration
Which one to buy
Zeiss replaced the Conquest HD with the Conquest HDX in 2024, and here the newer model is $50 cheaper than the old one. The HD 10x42 has been discontinued and owners say new stock dried up fast, so at these prices the HDX 8x42 is the easy call for most people. The HD makes sense only as a closeout or used buy at a real discount, and only if you want 10x.
HDX owners say Zeiss fixed nearly every complaint HD owners had. The HD is the heavy one in its class at 27.2 oz, against 25.2 oz for the HDX's magnesium body. HD owners say its eye relief runs shorter than its 16mm spec, enough that Zeiss handed out longer eyecups, and complain about mediocre stock eyecups and a diopter that drifts in a harness. The HDX gets 16.5mm of eye relief, redesigned eyecups that hold their click stops, and a diopter that locks. Its field flattener also tackles the HD's soft outer field, and HDX owners say the edges are dramatically better.
The HD's remaining argument is reach. It is a 10x, and owners say it was repeatedly the brightest 10x42 in its class at last light, with resolution they rank near far pricier glass. The HDX is an 8x with a 384 ft field against 345 ft and a 5.25mm exit pupil against 4.2mm, which makes it easier to use at dusk, though it shows less detail at range. HDX owners mention glare that is good rather than class-leading, middling close focus, and some unit-to-unit focus tension in early production. Pay HDX money, and the HDX is the better binocular; if a closeout HD 10x42 turns up well below that, it is still a fine hunting glass.
Zeiss Conquest HD 10x42
Only as a discounted closeout or used buy for a hunter who wants 10x reach and strong last-light performance, accepting the weight and tight eye relief.
Zeiss Conquest HDX 8x42
The better buy at these prices: lighter, sharper at the edges, with a locking diopter and better eyecups, and $50 cheaper than the model it replaced.
| Spec | Zeiss Conquest HD 10x42 | Zeiss Conquest HDX 8x42 |
|---|---|---|
| Approx. price | ~$1,050 | ~$1,000 |
| Use case | Birding | Birding |
| Magnification | 10x | 8x |
| Objective | 42mm | 42mm |
| Exit pupil | 4.2mm | 5.25mm |
| Field of view | 345 ft @ 1000 yds | 384 ft @ 1000 yds |
| Eye relief | 16mm | 16.5mm |
| Close focus | 6.6 ft | 6.6 ft |
| Prism | Roof | Roof |
| Glass | HD | HD |
| Coating | Fully Multi-Coated | Fully Multi-Coated |
| Weight | 27.2 oz | 25.2 oz |
| Dimensions | 5.9 x 4.7 in | 5.9 x 4.7 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
Zeiss Conquest HDX 8x42
- ✓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 HDX 8x42
- ✓Field flattener plus aspheric lenses deliver near edge-to-edge sharpness - early owners on forums say the edges are dramatically better than the old Conquest HD and even beat the Maven B-series flagships
- ✓About 90% light transmission with updated coatings - noticeably brighter and more color-accurate at dusk than the HD it replaces
- ✓Magnesium chassis cut roughly 10% of the weight versus the Conquest HD 8x42, fixing the old model's biggest complaint (heft)
- ✓Finally gets a locking diopter - a long-requested fix that hunters and travelers repeatedly call out as worth the upgrade alone
- ✓Redesigned eyecups are smoother, properly sized, and hold their click stops - another direct fix of a common HD-era gripe
- ✓New armor is resistant to sweat, sunscreen, and DEET, and the hinge accepts a tripod adapter up front
- ✓Wide 7.3-degree (383 ft) field of view with minimal rolling-ball distortion - flat-field skeptics report panning feels natural, not swimmy
- ✓German-made Zeiss build and ergonomics at roughly half the price of a Victory SF - widely called the new sweet spot of the lineup
- ✗Price jumped meaningfully over the outgoing Conquest HD (roughly $1,000-1,150 vs the HD's frequent $800-900 sales), so the value math is tighter
- ✗Glare resistance in harsh side-light is good but not class-leading - a few side-by-side testers found competitors like the Nikon Monarch HG handle low-sun glare slightly better
- ✗Still no Victory-level T* FL glass - chromatic aberration is well controlled but not eliminated on the harshest contrast edges
- ✗Close focus around 6.5 feet is fine but unremarkable - butterfly watchers do better with an SFL or Monarch HG
- ✗At around 25.8 oz it's lighter than the HD but still heavier than the Zeiss SFL 8x40 or Monarch HG, which some owners cross-shop specifically for weight
- ✗Early-production units are still shaking out - a handful of forum reports of focus-wheel tension varying unit to unit
- ✗The flat-field view, while mild, does introduce a hint of rolling-ball for the small minority who are sensitive to field flatteners
- ✗Discontinuation deals on the old Conquest HD made it a screaming bargain, and some long-time users argue the HD at closeout money was the smarter buy
Zeiss Conquest HD 10x42 vs Zeiss Conquest HDX 8x42: common questions
Is the Zeiss Conquest HD 10x42 still worth buying now that the Conquest HDX 8x42 exists?▾
Only at a real discount. The HD has been discontinued, and owners say used or closeout units are worth chasing for their glass. At these prices the HDX 8x42 costs $50 less and fixes the HD's weight, eyecup and diopter complaints.
Are the edges sharper on the Conquest HDX 8x42 than the Conquest HD 10x42?▾
Yes, by owner accounts. HD owners say sharpness falls away in the outer part of the field, while HDX owners say its field flattener makes the edges dramatically better. Most report that any rolling-ball effect when panning is mild or invisible.
Which Zeiss Conquest is better with eyeglasses, the HD 10x42 or HDX 8x42?▾
The HDX, with 16.5mm of eye relief and redesigned eyecups. HD owners say its 16mm runs shorter in practice, enough that Zeiss supplied longer eyecups free of charge, so check a used HD comes with them.