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Audubon HR/5 diopter adjustment (1 Viewer)
- Thread starter Chhayanat
- Start date
Thanks. The reason I asked was that I could not get infinity focus with a 1985 serial number 804R without my spectacles. I wear approximately -4.5 for distance vision with some compensation for axis and cylindrical power.
Steve C
Well-known member
I don't know what kind of competent repair facilities you can access from where you are. It is a relatively simple matter to adjust focus. I do not know how much the focus can be adjusted for your use, but be aware that the close focus function will be altered dramatically, like maybe to a close focus of 50-60 feet.
It is doable on my older Audubon 1c, but I never did anything with the HR/5.
I guess all of this depends on how much you want the binocular.
It is doable on my older Audubon 1c, but I never did anything with the HR/5.
I guess all of this depends on how much you want the binocular.
At present the glasses are in the US awaiting the conenience of Nicolas Crista. A close focus of 50-60 feet is much too far away, so I will just leave the glasses alone. At present, the close focus seems to be between 10-14 feet which is pretty good for a porro..
Chhayanat
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Howard220
Well-known member
Make sure Nicolas clearly understands what you are looking for with regard to focus setting. He initially set my 804R's to just reach infinity. (And oh, what a spectacular view after he worked them over.) But I had to send them back so that they would focus a little past infinity to ensure my myopic eyes would be able to focus them at infinity - without eyeglasses or contacts. I hope that makes sense!
Howard
My friend who took the glasses to the US, is awaiting a response from Nicolas Crista because his website says that glasses are not to be sent without speaking with him first.
Your suggestions re. infinity focus make eminent sense. Unfortunately, I have astigmatism as well and am, therefore, precluded from using binoculars without spectacles. In fact the 1980s Carl Zeiss Jena brochures used to warn against users with "heavy ametropia" from using their binoculars without spectacles. Given the poor eye relief of their Jenoptems, one had frequently to ignore this warning, till increasing myopia and astigmatism made viewing without spectacles unprofitable.
Howard220
Well-known member
Since you must wear spectacles, then you should be able to see through the Audubons just fine at the far focus Nicolas will set them to.
Let's see what Nicolas Crista has to say about the Audubons. I had asked my original question because I thought the far focus was a little too far away without spectacles. With spectacles, as you say, the far focus ought to be all right. Thanks.
