The catch
Vortex Diamondback HD 10x50
Lower magnification for a distant subject that stays still
Side by side
Vortex Diamondback HD 10x50 vs Vortex Diamondback HD 12x50 Compared: 12x weighs a little less, yet its 14 mm eye relief may matter more
Quick verdict
The Diamondback HD 10x50 is the one for a wider view and longer eye relief. Take the 12x50 for stationary distant detail, as long as you can support the binocular. The 12x weighs slightly less, yet its 14 mm eye relief is a bigger trade-off than that small saving.
Before you buy
Why, and what it costs you
Higher power here does not add carrying weight
The 12x50 weighs 1.1 oz less than the 10x50. Decide between them by how the view works for your subject and don’t assume the higher number makes for a heavier kit.
Where this comes from
The weights are 30 and 28.9 oz. Going from 10x to 12x raises magnification by 20%.
The catch
Vortex Diamondback HD 12x50
Eye relief is short at 14 mm
Vortex Diamondback HD 10x50
- Why pick it
- More surrounding scene and longer eye relief are what you are after
- A wider view appeals to you, and you intend to judge the larger calculated exit pupil on your own
- The catch
- Lower magnification for a distant subject that stays still
Vortex Diamondback HD 12x50
- Why pick it
- From a supported spot, you watch distant subjects that stay still
- The catch
- Eye relief is short at 14 mm
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What this page compares
Vortex Diamondback HD 10x50 vs 12x50. Weight is lower on the 12x, which pays for it in field width and eye relief. Let your distant subject, your glasses and your support plan guide the choice.
For buyers weighing a wider view against more power from a supported position, there are two large-objective Diamondbacks.
Which one fits
Pick the situations that sound like you
Glasses remain on throughout a long observation
Begin with the longer eye-relief allowance of the 10x model.
- Vortex Diamondback HD 10x50
- Better fit
- Vortex Diamondback HD 12x50
- Depends
A distant target holds still and support is on hand
12x increases magnification and the body weighs no more.
- Vortex Diamondback HD 10x50
- Good
- Vortex Diamondback HD 12x50
- Better fit
In the evening you sweep a broad area
A wider field and a larger geometric exit pupil come with the 10x.
- Vortex Diamondback HD 10x50
- Better fit
- Vortex Diamondback HD 12x50
- Good
A user who shares it has an eye spacing of 58 mm
Each begins at 60 mm.
- Vortex Diamondback HD 10x50
- Not suitable
- Vortex Diamondback HD 12x50
- Not suitable
In practice
Differences you will notice
Higher power here does not add carrying weight
The 12x50 weighs 1.1 oz less than the 10x50. Decide between them by how the view works for your subject and don’t assume the higher number makes for a heavier kit.
How we worked this out
The weights are 30 and 28.9 oz. Going from 10x to 12x raises magnification by 20%.
If glasses stay on, try the 10x
Eye relief is 3 mm longer on the 10x50. If you leave your glasses on so you can switch quickly between normal vision and the binocular, the fit can matter more than a larger image of the subject.
How we worked this out
The eye relief figures are 17 and 14 mm. Neither guarantees a full view with every frame shape.
In the evening, scene width and image scale diverge
A wider field and a larger calculated exit pupil are both on the 10x50 side. The 12x50 gains image scale for a stationary subject and pays for it with those two allowances.
How we worked this out
The fields measure 315 and 271 ft, which is a 14% reduction on 12x. The calculated exit pupils are 50/10=5 mm and 50/12=4.17 mm.
Option A
Vortex, Diamondback HD 10x50
Diamondback HD 10x50
With 50 mm objectives, the calculated exit pupil is 5 mm. Before you see this as an easy step up from the 10x42, look at the 60 mm minimum eye spacing and the 30 oz weight.
- Best for
- More surrounding scene and longer eye relief are what you are after
Facts we checked
- Magnification: 10x
- Eye relief of 17 mm
- Scene width: 315 ft at 1,000 yd
- Weight: 30 oz
Option B
Vortex, Diamondback HD 12x50
Diamondback HD 12x50
You get more magnification than the 10x50 and a slightly lower weight. The 14 mm eye relief and narrower field, though, make personal fit harder to get right.
- Best for
- From a supported spot, you watch distant subjects that stay still
Facts we checked
- Magnification: 12x
- Eye relief of 14 mm
- Scene width: 271 ft at 1,000 yd
- Weight: 28.9 oz
Spec by spec
Where they really differ
| Spec | Vortex Diamondback HD 10x50 | Vortex Diamondback HD 12x50 | In practice |
|---|---|---|---|
| Magnification | 10x | 12x | 12x is 20% above 10x. |
| Eye relief | 17 mm | 14 mm | The 10x gives 3 mm extra. |
| Scene width | 315 ft at 1,000 yd | 271 ft at 1,000 yd | With 12x, 14% of the stated width is lost. |
| Weight | 30 oz | 28.9 oz | 12x is 1.1 oz lighter. |
| Calculated exit pupil | 5 mm, calculated | 4.17 mm, calculated | Measured brightness isn’t ranked by this geometric result. |
Trade-offs
What each pick costs you
With Vortex Diamondback HD 10x50
- A little heavier, at 30 oz
With Vortex Diamondback HD 12x50
- The field is narrower and the calculated exit pupil is smaller
Change of plan
When the answer changes
Glasses fit and sweeping a wider area count most
Go with Vortex Diamondback HD 10x50. With the 10x you get more eye relief and also more scene width.
The subject holds still and the job is extra image scale
Go with Vortex Diamondback HD 12x50. With a suitable support plan, the 12x trade is worthwhile.
The binocular has to close down to an eye spacing of 58 mm
Neither model fits. Neither goes past 60 mm.
Decision guide
How to decide
Go with the Diamondback HD 10x50 if you want the wider view and longer eye relief, and with the 12x50 if distant stationary detail matters and you can support the binocular. The 12x weighs slightly less, but the 14 mm eye relief it trades away counts for more than that small saving.
Higher power here does not add carrying weight
Weighing 1.1 oz less than the 10x50, the 12x50 is the lighter of the pair. Decide by how the view works for your subject and do not assume the higher number means a heavier kit. The weights are 30 and 28.9 oz, and magnification rises from 10x to 12x, a 20% increase.
If glasses stay on, try the 10x
Eye relief is 3 mm longer on the 10x50. When your glasses stay on so you can flip quickly between normal vision and the binocular, fit can matter more than a larger subject image. The figures are 17 and 14 mm, and neither guarantees a full view with every frame shape.
In the evening, scene width and image scale diverge
A wider field and a larger calculated exit pupil both belong to the 10x50. The 12x50 buys image scale for a stationary subject and pays with those two allowances. The fields are 315 and 271 ft, a 14% reduction on 12x, and the calculated exit pupils are 50/10=5 mm and 50/12=4.17 mm.
What this page can’t tell you
- This all rests on manufacturer specifications and comparisons that can be reproduced. It involves no hands-on tests of sharpness, steadiness or brightness.
- Dividing objective diameter by magnification gives the exit pupil. That figure does not establish measured light transmission or a winner in low light.
- Neither published eye relief nor body dimensions guarantees a personal glasses fit or clearance inside a packed case.
By the numbers
What the data shows
What we found across the binoculars we compare, plus the checked facts behind each finding.
Show the facts and the math
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| Vortex Diamondback HD 10x50 |
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| |
| Vortex Diamondback HD 12x50 |
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Ready to buy
See today’s price and what owners say
Open either model on Amazon for the current price, customer reviews and delivery options.
Vortex Diamondback HD 10x50
More surrounding scene and longer eye relief are what you are after
See price & reviews on AmazonVortex Diamondback HD 12x50
From a supported spot, you watch distant subjects that stay still
See price & reviews on AmazonEach link opens in a new tab.
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