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Internal focus porros--2 sets down, 1 set to go

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#1 BobinKy

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Posted 14 January 2013 - 03:58 PM

Hi all!

For a few years now I have been trying to collect the sets of recently manufactured internal focus porros (six binoculars, three brands). Here are the two sets that now sit on my shelf. Leupold Cascades 8x42 porro
Leupold Cascades 10x42 porro
Minox BD 8x44 BP porro--Just arrived today from a seller in Saskatchewan :jump:
Minox BD 10x44 BP porroThese porro binoculars are unique because the focusing mechanism lies inside, not outside on the bridge; thus making these porros truly waterproof. And it seems from what I have read on various forums, these four binoculars were made in the same Japanese factory under the Leupold Cascades and Minox BD BP brands. However, the armor and eyecups are different from one brand to the next.

For those interested (and count me in that group), the other set (probably from the same Japan production) is still available under the Opticron brand. Opticron HR WP 8x42
Opticron HR WP 10x42 Some reviewers on the various optics forums state these six porros (Leupold Cascades, Minox BD BP, and Opticron HR WP) are the only internal focus binoculars ever made available to the public.

My thoughts on the four I own--great glass for daytime nature observers or the collectors. I prefer the feel of the Leupold in my hands and against my face; but I like the mechanical extras that Minox specified in their models. The Minox are heavier with more metal under the armor--giving them a beefy feel for the hunters in their market. Optically, the two brands are identical. Some users report good views of the night sky with both models. And in more than one thread, the views of the sweet spot in these porros is reported to be right there with the Nikon SE.

The only drawback some users report is the narrow field of view: 6.4° (8x42), 5.1° (10x42). I guess the decline of demand for porro binoculars with nature observers, and the narrow FOV, are the reasons these internal focus porros had limited production. However, I plan on keeping mine for some time.

Thanks all.

#2 hallelujah

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Posted 14 January 2013 - 04:53 PM

http://www.birdforum...ead.phpt=214018

http://www.allbinos....ifications.html

http://www.allbinos....netki&test_l=97

#3 Robert A.

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Posted 14 January 2013 - 05:55 PM

I have enjoyed using the Minox BP series. I do wish they did not have so much rubber added to the chasis.

Yes, the field of view is a bit restrictive. I am still wondering if it is a breaking point to me.

The biggest concern for me is that the prisms are not large enough to avoid some obstructions. --Maybe 10 percent.

These two details make me want to consider these Minox BP as if they should be a 8x35 or a 10x36. Then my mind says that this would make them an "honest" binoculars....

I have heard that occasionally people report that their Leupold Cascade or even their Minox BP does not have much prism obstruction. Maybe their cherry sample has optimum prism placement! At some time please share if you find a few of your samples have this detail of excellence. I would like to know.

Sincerely,
Rob.

#4 hallelujah

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Posted 14 January 2013 - 07:05 PM

Robert,

Have you read this review?

http://www.allbinos....etki&test_l=166

#5 Pinewood

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Posted 14 January 2013 - 07:16 PM

Hello all,

I believe that the Kern Focalpin Porro binoculars had internal focussing but were otherwise disappointing.

Clear skies,
Arthur Pinewood

#6 Robert A.

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Posted 14 January 2013 - 07:27 PM

Stan, Yes I did read that one more than a year ago. It does show the prism very nicely placed. It is better than mine. I do not think it is an average Minox BP. I believe it is a minority sample. (Obviously, I think my cup is half empty.) Maybe it is because I bought mine when the Minox BP was on close out. Could it be that both my 10x and my 8x were left-overs from when the best were sold? --I doubt it.
Rob

#7 Robert A.

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Posted 14 January 2013 - 07:40 PM

Arthur,
Are you recalling this old thread?
http://www.birdforum...ad.php?t=217623


Some people claim that one of the Steiner 8x30 has internal focusing. http://www.steiner-b...e8x30_pic1.html


http://www.birdforum...d.php?p=2094119

I agree that it is not as dynamic as other central focusing binoculars as the OP as indicated.

#8 BobinKy

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Posted 14 January 2013 - 08:23 PM

Arthur and Robert (and others)...

Thanks for your comments. I am glad to hear there have been other internal focusing porro binoculars. Here is a link to a BF discussion on the Kern Focalpin, a brand I have never heard of before today.

As I said in my first post, I like the ones I have been fortunate enough to acquire.

#9 BobinKy

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Posted 14 January 2013 - 08:27 PM

Stan...

Thank you. You certainly are the captain at finding links. :waytogo:

#10 hallelujah

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Posted 14 January 2013 - 08:33 PM

Stan
It does show the prism very nicely placed.
It is better than mine.
I do not think it is an average Minox BP.
I believe it is a minority sample.
Rob


My sample must also be a "minority sample".

http://www.cloudynig...ber/4268637/...

#11 hallelujah

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Posted 14 January 2013 - 08:34 PM

Stan...

Thank you. You certainly are the captain at finding links. :waytogo:


You're welcome Bob. :step:

#12 BobinKy

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Posted 14 January 2013 - 08:39 PM

The biggest concern for me is that the prisms are not large enough to avoid some obstructions. --Maybe 10 percent.

...RobertA



Robert...

The technical side of binoculars is not my strong point. Can you explain what you mean by the above?

Thanks.

#13 BobinKy

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Posted 15 January 2013 - 08:39 AM

Robert...

I checked all four models of the internal focus porros in my collection. None have any protrusions in the light path. I purchased these four binoculars over a period of several years from different sources and different geographic regions. I could do Glenn LeDrew's light-on-the-wall test to measure aperture. And I may someday. However, I do not think my models will vary more than a mm or two from the advertised aperture. Just a hunch, mind you. Overall, the models in my collection are quite nice. I an very glad to have them on my shelf.

Is it possible the models in your possession are the "minority samples"?






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