24mm Panoptic

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This is one of the most popular premium-quality 1.25” low to medium power wide field eyepieces. An ED glass element provides high contrast for observing very subtle low surface brightness features in extended nebulas. While it is particularly well-suited to observing with Dobsonian reflectors and fast focal ratio refractors (it provides a big 5.3mm exit pupil for rich field observing on an f/4.5 Dobsonian), it provides “picture window onto space” images with any telescope type.

You can use the calculator below to see just how wide the field will be with your particular telescope. For example, it will give you a 1.43 degree field at 48x with a 10” f/4.5 Dobsonian. This gives you over five and a half minutes of uninterrupted observing with such a scope while an object drifts from one side of the eyepiece’s flat field to the other. That’s plenty of time for multiple observers to look at the same object, or for you to absorb as much detail as possible, before having to reposition the scope.

An excellent eyepiece for observing galaxy clusters, framing emission nebulas with the black of space, observing the nebulosity around the Pleiades, etc. The 24mm Panoptic would be a welcome addition to any serious deep space observer’s eyepiece collection.

Field of view:
The field of view (FOV) is the amount of observable world one can see at any given moment.
68°
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.

11mm
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.

24mm
Number of optical elements:
6
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.
8.2 oz.
Warranty:
Limited Lifetime
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Overall Product Rating: AstronomicsAstronomicsAstronomicsAstronomicsAstronomics(5.00)   # of Ratings: 2   (Only registered customers can rate)

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1. christian on 5/25/2013, said: AstronomicsAstronomicsAstronomicsAstronomicsAstronomics
Without question a great eyepiece all the way around. Wide very well corrected field in a lightweight package. Hard to see a real difference between this and the ES24, but these are available.
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2. William on 4/30/2013, said: AstronomicsAstronomicsAstronomicsAstronomicsAstronomics
One of the standards for largest field of view in the 1.25" format and one of my most heavily used focal lengths. This is a fantasticly sharp and contrasty eyepiece; the 68 degree apparent field of view is very comfortable. I'm a devotee of relatively light, small eyepieces like this one (compared to some of the chunkier ones on the market). I also enjoy the simple design and quality construction of the Televue eyepieces. This is one that I highly recommend.
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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   



TeleVue - 24mm  Panoptic

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TeleVue - 24mm  Panoptic
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 AstronomicsAstronomicsAstronomicsAstronomicsAstronomics (Average: 5.00 | Users: 2)  Only registered users can submit ratings - Register Here
Our Product #: PAN24
Manufacturer Product #: EPO-24.0
Price: $330.00
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MSRP: $395.00
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One of the most popular premium-quality low to medium power wide field eyepieces available. Super for wide field viewing with fast focal ratio refractors and Dobsonians . . .





. . . our 34th year