8.8mm Series 5000 1.25" Ultra Wide Angle waterproof

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This new Meade 8.8mm waterproof Ultra Wide Angle eyepiece is an exceptional short focal length eyepiece for high magnification observing with all telescope types. It is O-ring sealed and nitrogen-purged to be 100% waterproof.

This 1.25” eyepiece uses seven optical elements for sharp, well-corrected performance across a very wide 82° field of view. At 15mm, its usable eye relief is quite long for a short focal length eyepiece, and its twist-up eyecup lets you match the eye relief to your eyesight and/or eyeglass use.

The 82° field of the Meade 8.8mm Ultra Wide is so wide that you can’t see the field stop without moving your head from side to side, so the eyepiece seems to disappear in use. It gives you the feeling of looking through a picture window into space, rather than through a constricted tube, as with a conventional narrow field eyepiece.

The Meade 8.8mm Ultra Wide eyepiece comes close to the optimum 1mm exit pupil that most closely matches the resolution of your eye to that of an f/10 Schmidt-Cassegrain telescope. This makes it a good choice for critical observing with this type of scope.

The eyepiece calculator that you'll find in the "Formulas" tab above will show you just how much magnification and field of view this eyepiece will provide with your particular telescope.

Field of view:
The field of view (FOV) is the amount of observable world one can see at any given moment.
82°
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.

15mm
Focal Length:
This is the length of the effective optical path of a telescopeor eyepiece (the distance from the main mirror or lens where the lightis gathered to the point where the prime focus image is formed). Focallength is typically expressed in millimeters.

The longer the focallength, the higher the magnification and the narrower the field of viewwith any given eyepiece. The shorter the focal length, the lower themagnification and the wider the field of view with the same eyepiece.

8.8mm
Number of optical elements:
7
Barrel Size:
The industry standard diameter, as of 2011, is 1.25" and is the most common.  Other sizes available are .965" and 2".
1.25"
Weight:
The weight of this product.
8 oz.
Warranty:
1 year
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1. Paul on 5/16/2013, said: AstronomicsAstronomicsAstronomicsAstronomicsAstronomics
A friend of mine noticed that my eyepiece case was severely lacking in premium eyepieces, so for Christmas gave me the Meade Series 5000 Ultra Wide angle eyepiece. Besides being blown away with that level of generosity I was blown away by the eyepiece itself. The views are clear and sharp all of the way across the field of view. I have not noticed any distortion near the edges and the color seems to be very good. My main visual instrument is a Celestron 6" F/8 refractor so there is a bit of chromatic abberation. However, this is inherent in the design of the short focal ratio scope not the eyepiece.
In all honesty since I have mainly used plossls over the years I am probably not the best judge of a premium eyepiece. Still compared to the plossl design this 7 lens system provides an 82 degree FOV and really great views. It won't make your 90mm refractor perform like a 150mm refractor but it will give you an outstanding visual treat!
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Helpful Formulas
Telescope Eyepiece Formula
To calculate the magnification and approximate actual field of view of this eyepiece on your telescope, enter the focal length of your telescope below and press the "Calculate" button.

Enter your telescope's focal length: mm   



Meade - 8.8mm Series 5000 1.25" Ultra Wide Angle waterproof

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Meade - 8.8mm Series 5000 1.25" Ultra Wide Angle waterproof
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Our Product #: M5U08WP
Manufacturer Product #: 07741
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This new waterproof Meade 8.8mm Ultra Wide is an exceptional short focal length 82° field eyepiece for high magnification observing with all telescope types, particularly Schmidt-Cassegrains . . .





. . . our 34th year