The catch
Nikon Prostaff P7 8x30
Eye relief is shorter at 15.4 mm
Side by side
Nikon Prostaff P7 8x30 vs Nikon Prostaff P7 8x42 Compared: 8x30 gives the wider walking view, 8x42 has more eye relief but can’t focus as close
Quick verdict
Long daytime walks and moving birds favor the Prostaff P7 8x30, which is lighter and has the wider field. The 8x42 is for you if its 20.2 mm eye relief suits your glasses better, and you accept a narrower view and a 9.8 ft near-focus limit.
Before you buy
Why, and what it costs you
The smaller P7 gives a wider scene
A lighter body and a wider field both come with the 8x30. In this pair, larger objectives don’t automatically buy you a wider view.
Where this comes from
The fields measure 456 and 377 ft, so the 8x30 is 21% wider, and it weighs 17.1 oz rather than 20.8 oz.
The catch
Nikon Prostaff P7 8x42
The field is narrower even with the larger objectives
Nikon Prostaff P7 8x30
- Why pick it
- You want less to carry and a wide view of moving birds
- Your seat is about 9 ft from the feeder
- The catch
- Eye relief is shorter at 15.4 mm
Nikon Prostaff P7 8x42
- Why pick it
- Trying 20.2 mm eye relief with glasses is the goal
- A narrower field is fine if it comes with the larger calculated exit pupil to try
- The catch
- The field is narrower even with the larger objectives
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What this page compares
Nikon Prostaff P7 8x30 vs 8x42. A feeder 9 ft away works with the lighter compact model. The 8x42 gives more eye relief to try with glasses on.
For the same 8x birding job, a compact wide-view P7 sits alongside a full-size P7 with longer eye relief.
Which one fits
Pick the situations that sound like you
Bird walks by day with a small bag
The 8x30 is 3.7 oz lighter and its field is wider.
- Nikon Prostaff P7 8x30
- Better fit
- Nikon Prostaff P7 8x42
- Good
You need longer eye relief because your glasses stay on
Test the 8x42’s 20.2 mm specification against your own frames.
- Nikon Prostaff P7 8x30
- Depends
- Nikon Prostaff P7 8x42
- Better fit
Birds visit a feeder that’s 9 ft from the chair
The compact model alone meets the published near-focus requirement.
- Nikon Prostaff P7 8x30
- Better fit
- Nikon Prostaff P7 8x42
- Not suitable
Dusk viewing from a set chair
The exit-pupil geometry isn’t the same, yet this research doesn’t name a winner for low-light image quality. Compare the view and eye fit for yourself.
- Nikon Prostaff P7 8x30
- Depends
- Nikon Prostaff P7 8x42
- Depends
In practice
Differences you will notice
The smaller P7 gives a wider scene
A lighter body and a wider field both come with the 8x30. In this pair, larger objectives don’t automatically buy you a wider view.
How we worked this out
The fields measure 456 and 377 ft, so the 8x30 is 21% wider, and it weighs 17.1 oz rather than 20.8 oz.
Glasses may be the reason to step up
On paper the 8x42 has 4.8 mm more eye relief. That may make it the better one to try if glasses stay on for the whole of a shared walk.
How we worked this out
The 8x30 has 15.4 mm of eye relief and the 8x42 has 20.2 mm. Neither your frame shape nor your actual eye position has been measured.
A feeder 9 ft away turns the upgrade around
At that distance the smaller model can focus. The 8x42 can’t meet its published 9.8 ft minimum, even if the garden feels roomy enough for either one.
How we worked this out
The close-focus figures are 8.2 and 9.8 ft, and the example viewing distance of 9 ft falls between them.
Option A
Nikon, Prostaff P7 8x30
Prostaff P7 8x30
For daytime bird walks, the wide 456 ft field is a good match. The locking diopter holds one user's setting, but anyone else who picks it up still has to set it for their own eyes.
- Best for
- You want less to carry and a wide view of moving birds
Facts we checked
- Eye relief of 15.4 mm
- Scene width: 456 ft at 1,000 yd
- Carrying weight: 17.1 oz
- Closest focus of 8.2 ft
Option B
Nikon, Prostaff P7 8x42
Prostaff P7 8x42
The 20.2 mm eye relief and the locking diopter are what earn this model a spot on your shortlist. On a small balcony, a feeder may still be too close, as close focus is 9.8 ft.
- Best for
- Trying 20.2 mm eye relief with glasses is the goal
Facts we checked
- Eye relief of 20.2 mm
- Scene width: 377 ft at 1,000 yd
- Carrying weight: 20.8 oz
- Closest focus of 9.8 ft
Spec by spec
Where they really differ
| Spec | Nikon Prostaff P7 8x30 | Nikon Prostaff P7 8x42 | In practice |
|---|---|---|---|
| Eye relief | 15.4 mm | 20.2 mm | The 8x42 gives 4.8 mm extra. |
| Scene width | 456 ft at 1,000 yd | 377 ft at 1,000 yd | The wider field belongs to the compact model. |
| Carrying weight | 17.1 oz | 20.8 oz | The 8x30 is 3.7 oz lighter. |
| Closest focus | 8.2 ft | 9.8 ft | Only one model suits a feeder at 9 ft. |
| Calculated exit pupil | 3.75 mm, calculated | 5.25 mm, calculated | The figures 3.75 and 5.25 mm describe beam geometry. |
Trade-offs
What each pick costs you
With Nikon Prostaff P7 8x30
- A smaller calculated exit pupil for viewing in the evening
With Nikon Prostaff P7 8x42
- 3.7 oz heavier, and the example 9 ft feeder is lost
Change of plan
When the answer changes
On your daytime walks, weight limits and moving birds go together
Go with Nikon Prostaff P7 8x30. Both priorities are met by the 8x30.
The 8x30 fits your glasses poorly, and the feeder is more than 10 ft away
Go with Nikon Prostaff P7 8x42. The candidate with longer eye relief is the sensible one to try next.
Your feeder at 7 ft has to stay in focus
Neither model fits. Both published minimum distances are beyond 7 ft.
Decision guide
How to decide
The Prostaff P7 8x30 is the pick for moving birds on long daytime walks because it weighs less and has the wider field. Pick the 8x42 when its 20.2 mm eye relief sits better with your glasses, which costs you a narrower view and a 9.8 ft near-focus limit.
The smaller P7 gives a wider scene
In this pair the 8x30 is both lighter and wider in field, so larger objectives do not automatically buy a wider view. The fields are 456 and 377 ft. That makes the 8x30 21% wider, at 17.1 oz against 20.8 oz.
Glasses may be the reason to step up
On paper the 8x42 has 4.8 mm more eye relief, which can make it the better one to try if glasses stay on for a whole shared walk. The figures are 15.4 mm for the 8x30 and 20.2 mm for the 8x42. Your frame shape and actual eye position have not been measured.
A feeder 9 ft away turns the upgrade around
The smaller model can focus from that distance. The 8x42 cannot, because its published minimum is 9.8 ft, even if the garden feels roomy enough for either. Close focus is 8.2 ft against 9.8 ft, and the example viewing distance of 9 ft sits between the two limits.
What this page can’t tell you
- The basis is manufacturer specifications and comparisons you can reproduce. It does not include hands-on testing 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 |
|---|---|---|---|
| Nikon Prostaff P7 8x30 |
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| Nikon Prostaff P7 8x42 |
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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.
Nikon Prostaff P7 8x30
You want less to carry and a wide view of moving birds
See price & reviews on AmazonNikon Prostaff P7 8x42
Trying 20.2 mm eye relief with glasses is the goal
See price & reviews on AmazonEach link opens in a new tab.
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