Jump to content


Photo

Nikon Action 8x40 8.2 Degrees

This topic has been archived. This means that you cannot reply to this topic.
11 replies to this topic

#1 PAW

PAW

    Ranger 4

  • -----
  • Posts: 333
  • Joined: 12 Oct 2006

Posted 17 May 2009 - 03:40 AM

About 2 weeks ago I bought these binoculars for the wide field of view (@ 8.2 degrees).

However, the edge to edge sharpness is awful. Stars almost look like nebulas for the last approx. 20% of the FOV.

Is this just something I have to live with? Is this normal on binoculars with a wide FOV?

#2 charen

charen

    Surveyor 1

  • ****-
  • Posts: 1659
  • Joined: 28 May 2005

Posted 17 May 2009 - 05:09 AM

Yes edge deterioration as you have seen is very normal in wide FOV binos. As a generalization the better the optics and build qualities the less edge deterioration there will be. The Nikon 'Action' is also the entry Nikon porro version so it will be more noticable. The higher quality Nikon AE version displays less edge deterioration.
For many observers they prefer the wide panoramic view and live with the peripheral edge distortions as the central image is sharp.

Chris

#3 EdZ

EdZ

    Professor EdZ

  • *****
  • Posts: 18820
  • Joined: 15 Feb 2002

Posted 17 May 2009 - 06:06 AM

Very few binoculars with 64° Afov eyepieces have a sharp outer fov. See how your binocular compares with a dozen others
http://www.cloudynig...hp?item_id=1761

Unfortunately the Nikon Action is one of the worst in this respect. the Nikon Action Extrreme is no better than the Action. But, compare both of those to a Pentax. Even with a much narrower field of view, it shows a wider shaper Tfov.

edz

#4 Luigi

Luigi

    Fly Me to the Moon

  • *****
  • Posts: 5320
  • Joined: 03 Jul 2007

Posted 17 May 2009 - 08:50 AM

With handheld bins, the expectation is that you move them around and point them at the objects you wish to view rather than hold them steady and look at the extreme edges. Your eyes are much worse than any bins having only ~2 degrees of high accuity FOV. Prove it to yourself by staring at a word in this post and seeing if you can read adjacent words. Your eyes need to dart around to take in detail over a broader FOV. Bins need to have enough sharp FOV to accomodate this short term darting, for larger angles, move the bins. Mounted bins and scopes are a somewhat different story.

#5 brocknroller

brocknroller

    Surveyor 1

  • *****
  • Posts: 1985
  • Joined: 16 Oct 2003

Posted 17 May 2009 - 09:18 AM

About 2 weeks ago I bought these binoculars for the wide field of view (@ 8.2 degrees).

However, the edge to edge sharpness is awful. Stars almost look like nebulas for the last approx. 20% of the FOV.

Is this just something I have to live with? Is this normal on binoculars with a wide FOV?


The Nikon 8x30 EII has the best edge performance I've seen in a truly WF 8x bin (8.8*). Plus, the fall off at the edges is gradual so for daytime use, you won't even notice it unless you direct your eyes to the very edge.

The EII sold for about $300(now discontinued but they occasionally appear on Amart and eBay).

If you are willing to compromise a bit on FOV (though less so than the Pentax) and are willing to pay about $400-$450, you could pick up a used Nikon 8x32 SE (7.5*). They sell new for $499.

It has the best edge performance of any center focusing 8x bin I've tried. I use it for birding and stargazing. See Edz's report for details.

Qapla' (Good Luck!)

#6 PAW

PAW

    Ranger 4

  • -----
  • Posts: 333
  • Joined: 12 Oct 2006

Posted 17 May 2009 - 01:24 PM

Thanks everyone, I should have read EdZ report before I bought - and I usually do.

They are fine for daytime use, but I just can't use them at night - the fuzziness bothers me to much.

Part of the reason I did not read the report until now is because I have been so impressed with my Nikon Action 10x50's.

#7 ErnieM

ErnieM

    Apollo

  • -----
  • Posts: 1425
  • Joined: 13 Jun 2004

Posted 17 May 2009 - 06:10 PM

I was thinking about buying a pair of the extremes but after reading this thread I guess I will turn to the Celestron 10X42 Outland LX.I am not sure if they replaced the Regal series,but I better read Ed's report also.

#8 PAW

PAW

    Ranger 4

  • -----
  • Posts: 333
  • Joined: 12 Oct 2006

Posted 23 May 2009 - 01:19 AM

BTW: The 8x40's I am referring to are the Nikon Action Ultra Wide View.

Apparently a new version is available with a 6 deg FOV.

#9 ronharper

ronharper

    Vanguard

  • *****
  • Posts: 2216
  • Joined: 14 Feb 2006

Posted 23 May 2009 - 10:06 AM

People who own premium binoculars are usually the ones who say they aren't concerned with edge sharpness. At this level, people even complain that one or the other alpha binocular has a relatively bad field correction! But it's easy to forget how spoiled one has become. I've been guilty of this myself sometimes.

But, a really badly corrected edge is very distracting. I occasionally look through my old Bushnell Insta-Focus 7x35 or Nikon Travelite 8x25 to recalibrate myself. If the edge looks not only blurred, but there are also excessive 2-d distortion or 3-d bowl-shaped effects present in the field, it can be intolerable, even if the central field is okay.

Skywatching is the acid test, since a burred star looks not like a star at all, while a blurred stump can still appear quite stumplike.

It is hopeless to try to convince someone to like a view that they do not like. There is a range of personal tolerance, but if it looks ugly to you, that's the bottom line, and cheap wide fields are not going to be your thing.
Ron

#10 PAW

PAW

    Ranger 4

  • -----
  • Posts: 333
  • Joined: 12 Oct 2006

Posted 23 May 2009 - 01:42 PM

I would put these 8x40 Ultra Wide View's in the category of unusable for night viewing. The stars distort to the point that they look like big blobs.

As mentioned, I have a pair of 10x50 Actions (6.5 degrees) and they are fine.

I'm now looking at:

Nikon 7x35 Action Extreme ATB Binoculars (9.3 degress)

or

Pentax 8x40 PCF WP II Binoculars

#11 PAW

PAW

    Ranger 4

  • -----
  • Posts: 333
  • Joined: 12 Oct 2006

Posted 02 July 2009 - 01:11 AM

As I have spent more time with these binoculars (8x40 Action 8.2 Degrees), I am convinced my pair has a manufacturing defect. I noticed that the two barrels never really merge into a single circle when viewing through the binos.

Also, the very outer edge (say 10-15%) seems to have an artifact and that I believe is why stars look so blurry on the outside edge.

Or is this just a symptom of cheap binoculars?

The 'artifact' looks like (2) concentric rings with the outer ring being the edge of the field and then inner ring about 10% in from the outer ring. They appear translucent.

#12 Onslowe

Onslowe

    Sputnik

  • -----
  • Posts: 35
  • Joined: 28 Jan 2007

Posted 02 July 2009 - 01:44 AM

I have the Opticron 8 x 42 (8.2 degree) and they have bad distortion (seagull shaped stars) for the last 20 % of the field but the remainder of the image is good. For £40 I paid they are more than adequate. I got them as I had to return a pair of 12 x 50 Pentax PCF WP II's which had large spikes showing on the brightest stars and were unusable for astro work (they did however maintain sharpness out to the edge of field). Obviously these faults are impossible to check in daylight so if you can purchase at a local store it makes an exchange much easier. Good luck.
Martin






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics