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Eye cups Swarovski Habicht 10x40 GA (1 Viewer)

Renze de Vries

Well-known member
I know the Swarovski porro 10x40 GA has short eye relief (12 a 13 mm) and is definitely not designed to be used with spectacles, but I like to try the possibility anyway. Question: can I take off the eye cups easily? Would I gain some mm's by using the binocular without eye cups?

Thanks,

Renze
 

John A Roberts

Well-known member
Australia
Hi Renze,

FWIW
Before the introduction of soft rubber eyecups, Swarovski used to offer hard (bakelite?) eyecups in both a regular length,
and a short length intended for spectacle users, as in the attached example

I’ve not seen them offered separately, though they do sometimes show up on original body models
i.e. the pre-1984 models, without the valve cap screws on the front bridge arms

And yes, pre- and post-1984 model eyecups are interchangeable


John
 

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John A Roberts

Well-known member
Australia
And a workaround (this should have occurred to me straight away!) . . .

There is a winged replacement eyecup that fits over the outside of the Habicht eyepiece
See an image from Samolot, along with one from Henning. Both more images and detail can be found in the thread at:
https://www.birdforum.net/threads/replacing-eyecups-on-the-habicht-8x30-w.367763/

The images show the replacement eyecups on the leatherette model, while leaving the original rubber eyecups in place
However, they can also be used without the original eyecups, which is my preference on my leatherette 7x42
And on the rubber armoured models the larger diameter original eyecups have to be removed, before the replacements can be fitted

. . . you could cut down a pair so that they are slightly proud of the eye lenses - and so protect both the eye lenses and the eye piece threads,
along with your spectacle lenses - while maximising the usable eye relief


John


p.s. for the differences between the original leatherette and RA eyecups see an image from Rathaus at:
https://www.birdforum.net/showpost.php?p=3263219&postcount=34
 

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John A Roberts

Well-known member
Australia
And in relation to the amount of the potential gain in useable eye relief . . .

Firstly, in comparing the eyecups on the RA and the leatherette versions, the RA eyecups are both:
• larger in diameter at the rear, at 39 mm vs 33 mm, and
• extend very slightly further to the rear of the eyepiece, by perhaps just over 1 mm

In terms of maximising the useable eye relief:
The RA eyecups extend around 9 mm behind the rear most point of the eyepiece
(on the eyepiece there is a protective metal rim that’s very slightly to the rear of the eye lens face, see the image from the link below)
If you were to trim the replacement eyecups, so that they extended 2 mm behind the rearmost portion of the eyepieces,
you could potentially move your spectacles 7 mm closer to the eyepieces

Of course, depending on the degree of curvature on the front surface of your spectacles, you might need to leave the eyecups longer
As the eyecups are not expensive, perhaps get 2 pairs so that if need be you can experiment?


John


p.s. It might be useful to read the observations of Roger Vine (who also wears glasses) with the leatherette version at:
 

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