Televue 31mm Nagler Type 5 Eyepiece - 2" / Ultra Wide Field 82 Degree For Sale
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Televue 31mm Nagler Type 5 Eyepiece - 2" / Ultra Wide Field 82 Degree:
$511
Tele Vue 31mm Nagler Type 5 2" Ultra Wide Field
Eyepiece with 82 Degree Field of View.
The Televue 31mm Nagler Type5 eyepiece is a 6-element design with more true field, better imaging and contrast enhancement.
This is a 2" barrel design with an 82ยบ apparent field of view and 19mm of eye relief.
The Televue 31mm Nagler Type5 has blackened lens edges, anti-reflection threads and rubber eyeguards deliver maximum contrast.
100% full field visual inspection with TeleVue flat-field test instruments guarantees performance.
DESCRIPTION
Type:Ultra Wide AngleFocal Length:31 mmBarrel Size:2 inApparent FOV:82.0 degreesField Stop Dia.:42.0 mmEye Relief:19 mmElements:6Weight (lbs):2.2
TeleVue Nagler Eyepieces
Televue Nagler Type 5 Eyepieces: With the 31mm, the unique 6-element
design using four exotic glasses, maintains the contrast advancement of the Type
4s while achieving a true field area 82% larger than the 22mm Type 4! Owners of
fast Dobsonian/Newtonians can enjoy a larger true field, free of secondary
shadowing, than ever before. For example, a 12.5", f/4.5 scope with a Paracorr
will deliver a 1.5 degree field (3 Moon diameters), at 53x with a 6mm exit
pupil. Use our eyepiece calculator to figure out what the 31mm will deliver on
your scope.
"Despite the presence of no less than seven optical elements, these [Nagler]
eyepieces provide images which are noticeably brighter than those obtained with
many quality orthoscopics, with superb image sharpness and contrast. Even though
these oculars are quite expensive, the serious planetary observer would do well
to consider employing this type." - Don Parker et al., Introduction to
Observing and Photographing the Solar SystemTeleVue Product Number:
EN5-31.0
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