The catch
Vortex Diamondback HD 10x28
A shared user may be excluded by a 57 mm minimum
Side by side
Vortex Diamondback HD 10x28 vs Vortex Triumph HD 10x28 Compared: Six-foot wildlife is within Diamondback’s reach, but Triumph needs 9.9 feet
Quick verdict
When nearby wildlife is on the agenda, take the Diamondback HD 10x28, which focuses from 6 ft where the Triumph needs 9.9 ft. The Triumph HD 10x28 is for distant subjects, and it wins if its 56 mm minimum eye spacing or 0.5 oz weight saving counts for more.
Before you buy
Why, and what it costs you
Garden use pulls apart compacts that otherwise look alike
The Diamondback suits a feeder 8 ft away, which is inside the Triumph’s minimum focus distance. Travel subjects that are farther off take that difference away.
Where this comes from
The published close-focus figures are 6 and 9.9 ft, and the example 8 ft feeder falls between them.
The catch
Vortex Triumph HD 10x28
Close feeders are ruled out by a 9.9 ft minimum
Vortex Diamondback HD 10x28
- Why pick it
- Your feeder sits 7 or 8 ft away
- A compact 10x body with slightly more eye relief is what you need
- The catch
- A shared user may be excluded by a 57 mm minimum
Vortex Triumph HD 10x28
- Why pick it
- Someone you measured needs 56 mm eye spacing
- All your viewing is beyond 10 ft, and you want the lower listed weight
- The catch
- Close feeders are ruled out by a 9.9 ft minimum
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What this page compares
Vortex Diamondback HD vs Triumph HD 10x28. An 8 ft feeder is within reach of the Diamondback, and a 56 mm viewer fits the Triumph. See which compact covers both of your needs.
Two compact 10x28 models are close in size, yet their near focus differs enough to change a garden purchase.
Which one fits
Pick the situations that sound like you
The window is 8 ft from a feeder
The Diamondback alone can reach the stated focus distance.
- Vortex Diamondback HD 10x28
- Better fit
- Vortex Triumph HD 10x28
- Not suitable
A user’s eye spacing measures 56 mm
The Triumph adjusts down to that measurement.
- Vortex Diamondback HD 10x28
- Not suitable
- Vortex Triumph HD 10x28
- Better fit
Storage is limited by a narrow pocket
The Diamondback’s listed dimensions are smaller. Before assuming it fits, check the actual folded body, the carry case and the pocket opening.
- Vortex Diamondback HD 10x28
- Depends
- Vortex Triumph HD 10x28
- Depends
On light walks you look only at distant subjects
A small 0.5 oz comes off with the Triumph, and 10x magnification stays.
- Vortex Diamondback HD 10x28
- Good
- Vortex Triumph HD 10x28
- Better fit
In practice
Differences you will notice
Garden use pulls apart compacts that otherwise look alike
The Diamondback suits a feeder 8 ft away, which is inside the Triumph’s minimum focus distance. Travel subjects that are farther off take that difference away.
How we worked this out
The published close-focus figures are 6 and 9.9 ft, and the example 8 ft feeder falls between them.
One millimeter of eye spacing can flip the choice
Someone who measures 56 mm is inside the Triumph range and outside the Diamondback range. That rules the Diamondback out on fit, even though it focuses closer.
How we worked this out
Adjustment on the Diamondback runs from 57 to 73 mm, and on the Triumph from 56 to 73 mm.
The lighter pair is not the smaller one
The Triumph weighs 0.5 oz less, though it’s longer and wider. A tight pocket can favor the Diamondback, even when a shortlist based on weight alone favors Triumph.
How we worked this out
The Diamondback comes in at 13.3 oz and 4.6 by 4.5 inches. The Triumph is 12.8 oz and 5 by 4.8 inches.
Option A
Vortex, Diamondback HD 10x28
Diamondback HD 10x28
A nearby feeder is fine with 6 ft close focus, and 10x pulls distant subjects in. Compared with the 8x28, the 273 ft field and 16 mm eye relief are both tighter.
- Best for
- Your feeder sits 7 or 8 ft away
Facts we checked
- Closest focus of 6 ft
- Eye-spacing fit: 57–73 mm
- Weight: 13.3 oz
- Body length and width: 4.6 by 4.5 in
Option B
Vortex, Triumph HD 10x28
Triumph HD 10x28
At 12.8 oz it is easy to fit into the weight budget of a day bag. If wildlife often comes close, the 9.9 ft near-focus limit counts for more than the 10x label.
- Best for
- Someone you measured needs 56 mm eye spacing
Facts we checked
- Closest focus: 9.9 ft
- Eye-spacing fit: 56–73 mm
- Weight: 12.8 oz
- Body length and width: 5 by 4.8 in
Spec by spec
Where they really differ
| Spec | Vortex Diamondback HD 10x28 | Vortex Triumph HD 10x28 | In practice |
|---|---|---|---|
| Closest focus | 6 ft | 9.9 ft | For a nearby garden, this is the main distinction. |
| Eye-spacing fit | 57–73 mm | 56–73 mm | With 56 mm, the usual preference flips. |
| Weight | 13.3 oz | 12.8 oz | Triumph is 0.5 oz lighter. |
| Body length and width | 4.6 by 4.5 in | 5 by 4.8 in | The lighter model needs more room. |
| Eye relief | 16 mm | 15 mm | Diamondback has an extra millimeter on paper. |
Trade-offs
What each pick costs you
With Vortex Diamondback HD 10x28
- A bit heavier, at 13.3 oz
With Vortex Triumph HD 10x28
- The listed body is bigger despite lower weight
Change of plan
When the answer changes
Much of your wildlife viewing is 6 to 9 ft away
Go with Vortex Diamondback HD 10x28. The practical reason to pick Diamondback is near focus.
The viewer’s spacing measures 56 mm and subjects stay farther than 10 ft
Go with Vortex Triumph HD 10x28. Triumph suits the eye spacing and handles that viewing distance.
Your needs include 56 mm eye spacing as well as an 8 ft feeder
Neither model fits. Each one fails a different hard constraint.
Decision guide
How to decide
Nearby wildlife points to the Diamondback HD 10x28, since it focuses from 6 ft rather than 9.9 ft. For distant subjects, the Triumph HD 10x28 is the choice if the 56 mm minimum eye spacing or the 0.5 oz weight saving matters more to you.
Garden use pulls apart compacts that otherwise look alike
The Diamondback can handle a feeder 8 ft away, while for the Triumph that is inside its minimum focus distance. Subjects farther off, such as on a trip, make the difference disappear. Published close focus is 6 and 9.9 ft, and the example 8 ft feeder lies between those limits.
One millimeter of eye spacing can flip the choice
A user measured at 56 mm fits within the Triumph range and outside the Diamondback range. That rules the Diamondback out on fit, even though it focuses closer. The Diamondback adjusts from 57 to 73 mm and the Triumph from 56 to 73 mm.
The lighter pair is not the smaller one
Saving 0.5 oz, the Triumph is also longer and wider. A tight pocket can tip things to the Diamondback even though a shortlist built on weight alone would pick the Triumph. The Diamondback weighs 13.3 oz and measures 4.6 by 4.5 inches. The Triumph weighs 12.8 oz and measures 5 by 4.8 inches.
What this page can’t tell you
- Comparisons here draw on manufacturer specifications and can be reproduced, and none involve hands-on tests of sharpness, steadiness or brightness.
- Exit pupil comes from objective diameter divided by magnification, so it cannot show measured light transmission or a low-light winner.
- Glasses fit and packed-case clearance are personal, and published eye relief and body dimensions cannot guarantee either one.
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 10x28 |
|
| |
| Vortex Triumph HD 10x28 |
|
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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 10x28
Your feeder sits 7 or 8 ft away
See price & reviews on AmazonVortex Triumph HD 10x28
Someone you measured needs 56 mm eye spacing
See price & reviews on AmazonEach link opens in a new tab.
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