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Nikon Lookout 10x50 vs current Nikons?

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8 replies to this topic

#1 Senex Bibax

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Posted 26 October 2020 - 08:44 AM

I spotted a pair of Nikon "Lookout" 10x50 / 6 Degree binoculars for sale that appear to be in excellent condition, but not local enough for a pre-purchase inspection. How do these Nikons compare to the more recent lineup? I have a pair of Nike Action Extreme 8x40s that are pretty solid. Obvious differences are the construction and source country - the Lookouts have a visible gold Japanese inspection sticker, the Action Extremes are made in China. The Lookouts also have a distinct green colour to the objectives.

 

Thanks

 

Patrick



#2 Jon Isaacs

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Posted 26 October 2020 - 08:54 AM

I've owned a couple of versions of the 10x50 Lookouts.

 

I think of them as part to the Action/Aculon serlies, short eye relief etc.

 

Others will know more.

 

Jon



#3 hallelujah

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Posted 26 October 2020 - 01:03 PM

If you look under the silver Nikon logo on the front of the Binoculars it says ACTION in small black letters. (very had to see)

 

I have the Lookout II, 10x50, 6 degrees, made in Japan.

The optics are excellent as are the coatings.

Everything about my sample is excellent. waytogo.gif

My version was manufactured around 1989

 

I never noticed the short eye relief because I usually use my Nikon Gold Sentinel 10x50, with 6.5 degree FOV. like-button.jpg

I can use my Lookout II 10x50 with my eyeglass without any problem.

 

I once owned a newer Nikon Action 16x50; optical coatings on it were fewer than the optical coatings on the Action Extreme & it produced noticeable ghost images when viewing the full moon.

Sold it & replaced it with a Pentax 16x60 PCF WP porro.

 

Stan


Edited by hallelujah, 26 October 2020 - 02:19 PM.


#4 Jon Isaacs

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Posted 26 October 2020 - 01:45 PM

I had a pair of Lookout 2 10x50s . What is the diameter of the eye lens?

 

Jon



#5 hallelujah

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Posted 26 October 2020 - 02:10 PM

I had a pair of Lookout 2 10x50s . What is the diameter of the eye lens?

 

Jon

13mm

 

14mm for the Gold Sentinel


Edited by hallelujah, 26 October 2020 - 02:14 PM.


#6 Rich V.

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Posted 26 October 2020 - 03:11 PM

I had a pair of Lookout 2 10x50s . What is the diameter of the eye lens?

 

Jon

 

 

13mm

 

14mm for the Gold Sentinel

 

 

FWIW, a later design eyepiece with a 65° AFOV/ "20mm" ER like the MS/MS ED 10x50 has a 28mm eye lens.



#7 Jon Isaacs

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Posted 27 October 2020 - 07:14 AM

13mm

 

14mm for the Gold Sentinel

 

Thanks.

 

Based on the fact that the edge of eye lens must be visible from the eye relief point, one can construct an isosceles triangle with it's base being the eye lens diameter and the included angle being the AFoV.  Using trig, one can calculate the maximum eye relief possible.  

 

Using some trig:

 

Eye relief = (Eye Lens / 2) x Tan(AFoV/2)  

 

For an AFoV of 60 degrees, a 13mm eye lens has 11.2mm of eye relief max, a 14mm has 12.1mm.  Those are similar to the Aculons.

 

Eye lens AFOV eye relief.jpg  

 

Jon


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#8 Jon Isaacs

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Posted 27 October 2020 - 10:42 AM

You meant an AFOV of 60°, right, Jon?  wink.gif

 

Yes.

 

If the Afov were 6 degrees,  the eye relief would be 133 mm.. 

 

I did change my post.. 

 

Jon



#9 Cali

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Posted 29 October 2020 - 08:47 AM

Just picked up the Nikon 7245 Action Ex Extreme (10x50). They have the sharpest view of any binocular I own.

 

Highly recommended.

 

- Cal




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