30x wide angle eyepiece (30x with 65mm Zeiss scopes, 40x with 85mm Zeiss scopes)

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The Zeiss Diascope 30x/40x wide field spotting scope eyepiece provides a 20% wider field of view than the Zeiss zoom eyepiece set at the same power. It is an excellent eyepiece for those observers who need a single all-around magnification eyepiece with wide field capabilities, and who don’t need a zoom’s high power capability. The eyepiece is marked with magnifications for both 65mm and 85mm Zeiss scopes.

The external surfaces of the eyepiece are treated with permanent “LotuTec" coatings. These special hydrophobic (water-repelling) coatings are so smooth, even at the molecular level, that water can find virtually no grip on the optical surfaces. This causes the condensation from rain, fog, snow, or your own breath to form in much smaller droplets than on standard optical coatings. Smaller droplets scatter less light, resulting in higher light transmission and a clearer image. Oil, dirt, and grease are similarly repelled, making for simplified, streak-free cleaning.

The eyepiece has a pull-up rubber-rimmed eyecup, so you won’t have to worry about a rolldown eyecup deteriorating with age as you do with other eyepieces. A slight twist of the eyecup locks it in place when it is fully extended. It comes with a Cordura-type zippered carrying case with a convenient belt loop for no-hands carrying. There are dust covers for both ends of the eyepiece. This fully-multicoated eyepiece bayonets securely into Zeiss 65mm and 85mm spotting scopes and can be changed in seconds. And the image quality is no less than you’d expect from Zeiss . . . absolutely superb.

The specifications to the right are for the eyepiece when used in a Zeiss 65mm Diascope spotting scope. When used in an 85mm Zeiss spotting scope, the eyepiece provides 40x and a 90’ field of view at 1000 yards. Eye relief is 18mm in both cases.

Power:
30x
Field of view 1000 yards:
120'
Eye Relief:
Eye relief is the distance from the last surface of the eye lens of an eyepiece to the plane behind the eyepiece where all the light rays of the exit pupil come to a focus and the circular image is formed, sometimes called the “Ramsden Disk.” This is where your eye should be positioned to see the full field of view of the eyepiece. If you must wear glasses because of astigmatism, you’ll usually need at least 15mm of eye relief or longer if you want to see the full field of view with your glasses on.

A note on our eye relief figures: Quite often, our eye relief figures will differ from those of the manufacturer. This is because we measure the “usable” eye relief, while the manufacturers specify their usually-longer (but technically correct) “designed” eye relief.

The eye lens of the eyepiece is normally recessed below the rubber eyeguard or rubber rim of the eyepiece to keep the lens from being scratched during use. An eyepiece might have a “designed” eye relief of 15mm (and the eye relief will truly measure 15mm from the eye lens to where the image forms). However, if the eye lens is recessed 3mm below the eye guard, the Ramsden Disk forms only 12mm above the eyepiece body (the 15mm “designed” eye relief, less the 3mm of eye relief made unusable by having the eye lens recessed into the body of the eyepiece). This “usable” eye relief of 12mm (measured from the rolled-down eyeguard – the closest point you can get your eye to the eye lens – to where the image forms) is the eye relief figure we would measure and list in this website.

Why is it important to list the “usable” eye relief? For those people who don’t wear eyeglasses while observing, a few mm difference between the eye relief they expect from the manufacturer’s literature and the shorter eye relief they actually get in real life doesn’t mean a lot. They can simply move a little closer to the eyepiece to see the full field, and never realize that the eye relief is a little shorter than they expected. However, some people must wear eyeglasses while observing, because of severe astigmatism. These observers can’t move closer to the eyepiece if the eye relief is shorter than expected because their glasses get in the way. For these people, the real life “usable” eye relief is more important than the technically correct but sometimes not fully usable “designed” eye relief. We measure and list the actual usable eye relief so that people in the real world can pick the eyepieces that will work best for them.

18mm
Weight:
The weight of this product.
8 oz.
Warranty:
Limited Lifetime
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Telescope Eyepiece Formula
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Zeiss - 30x wide angle eyepiece (30x with 65mm Zeiss scopes, 40x with 85mm Zeiss scopes)

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Zeiss - 30x wide angle eyepiece (30x with 65mm Zeiss scopes, 40x with 85mm Zeiss scopes)
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Our Product #: Z30N
Manufacturer Product #: 52 80 66
Price: $450.00  FREE ground shipping - Click for more info
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This wide field Zeiss spotting scope eyepiece is an excellent choice for Zeiss Diascope observers who prefer a single magnification eyepiece with wide field capabilities, and who don’t need a zoom’s high power capability . . .





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