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Archives of an email list on the history of binoculars. - page 27 / 150





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  I've made the acquaintance of Mr. Al Misiuk, a coating pro at Sirius Optics, who is stripping the golden coatings off my 30x180 binocular objectives. Al has expressed a willingness to discuss small-lot, custom coating services for people like us. I'm reluctant to mention what he's charging me, since I don't think he's charging enough.

  His email addresses are as follows.



  Regards, Dick Buchroeder


Stripping coatings is not something we'd need done very often, but it requires experience to know how to approach each optic element.  Treatments that will remove coatings can also attack glass.  Misiuk has a good reputation.



Subject:  Review Kronos

  There's a long review of the Kronos BPWC2 6x30 binocular, by Holger Merlitz, at:



Subject: Hercules 18mm binocular

From: "Loren A. Busch" <lbusch@___com.com>

A friend would really be pleased if someone could identify these and might have an eyecup replacement.

Marked "Hercules"  6(8?)x18, and Made in Occupied Japan.

I loaded images to a Web page:



I haven't seen this Hercules before, the design is a little different than the typical Japanese 'open frame'.

Eyecups:  Taking them to repair shops & hoping a more recent eyecup fits, is one possiblity.

I've lathe-turned workable eyecups out of ebony.  Others are casting duplicates of eyecups using resin.



Subject: The Porro II Dilemma

From: Kennyj2@___m

  It is refreshingly unusual to be asked for opinions on any binocular at the design stage , and not as easy once put on the spot to make a sensible suggestion .

  I think that although a Centre Focus bino is certainly much more appealing to the great majority of binocular users , I have a feeling that for all but boating and some hard -core "old fashioned " astro -use , a 7 x 50 Porro configuration is becoming somewhat out of vogue . Most serious birders these days seem to prefer water -proof roofs ( even though IMHO the image through all but the VERY best is inferior to that through a good porro such as the Nikon Superior E range ) and there seems to be a trend towards higher -power models from 8.5 through to even 12x.

  Many amateur astronomers seem to be slowly realising that the traditionally favoured and thus oft recommended  7mm exit pupil is surplus to requirements in probably 90% of viewing situations . That is to say that it may be ideal for a 20 year old person in a really dark sky location but for a 50 year old in average conditions , a 7 x 42 or even 7 x 35 performs just as well , usually with the

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