Dioptrx, Tele vue – Tele Vue Delos Eyepiece User Manual

Page 2

Your telescope's focuser is used to compensate for your near- or far-sightedness; DIOPTRX™ compensates for your
astigmatism. These units attach and lock onto the tops of over 20 long eye-relief Tele Vue eyepieces to achieve the
sharpest full-field viewing possible. DIOPTRX™ models are available in ¼ to 3½ diopter (¼ steps from ¼ to 2½
diopters, then ½ diopter steps to 3½-diopters), and are rotatable for tuning to the best orientation. A series of engraved
letters on the barrel helps to monitor orientation. Simply choose the DIOPTRX™ model that matches your eyeglass
prescription for astigmatism. All lenses are multi-coated glass in anodized aluminum housings with rubber eyeguards.
Benefits of using Dioptrx over eyeglasses
1. You're more likely to see a sharper, higher contrast image, because:

A. The Dioptrx is always completely aligned to the eyepiece optics, eliminating aberrations from a decentered
mismatch of eyeglass power and astigmatic axis.
B. Dioptrx can be rotated to exactly compensate for the astigmatic axis angle in real time, since both head angle
and age can vary your eyesight astigmatic angle.
C. Dioptrx likely has better multi-coatings than eyeglasses, and certainly is better in transmission and reflection
reduction than uncoated eyeglass.
D. Dioptrx is more likely to be cleaner than eyeglasses, which may have scratches and smudges from constant
use and wear and tear.
E. Dioptrx allows seeing your normal maximum contrast that eyeglasses can diminish (remove your eyeglasses
and see how contrast improves in normal vision).

2. You're more likely to see the full field in 100° Ethos eyepieces because your eyeglasses are more limiting in
"effective eye-relief".

DIOPTRX™

32 Elkay Dr., Chester, New York, 10918 (845) 469-4551 televue.com

Tele Vue

V i s i o n a r y

Tele Vue Dioptrx, Your Prescription for Better Viewing

When attached to any of the following long eye relief Tele

Vue eyepieces, DIOPTRX compensates for your eyesight

astigmatism. Most of these eyepieces have long eye relief

for eyeglass wearers, so simply adding DIOPTRX to

replace your eyeglasses should leave you with comfortable

eye relief. DIOPTRX corrects astigmatism only, since

focusing compensates for your power correction.

DIOPTRX Astigmatism correction

Every DIOPTRX includes

a rubber eyeguard and

lens cover

Your eyeglass prescription should look

something like the example below. Your

DIOPTRX value should match the CYL

(cylinder) value for your preferred viewing eye.

If you require more than 3.5 diopters correction,

call Tele Vue (845-469-4551) for info on

“stacking” DIOPTRX

SPHERICAL CYL AXIS

O.D.

(Right eye)

O.S.

(Left eye)

product code

(in diopters)

DRX-0025

0.25

DRX-0050

0.50

DRX-0075

0.75

DRX-0100

1.00

DRX-0125

1.25

DRX-0150

1.50

DRX-0175

1.75

DRX-0200

2.00

DRX-0225

2.25

DRX-0250

2.50

DRX-0300

3.00

DRX-0350

3.50

Installation Instructions

(Additional technical information is available on our website at:

www.televue.com)

1) Pull off and save rubber eyeguard from eyepiece.

2) While holding lower engraved bottom ring of DIOPTRX with one hand, unscrew upper top ring (containing lens and rubber eyeguard) just enough so the assembly slips

over the eyepiece top.

3) While still holding the lower ring, re-tighten upper ring on DIOPTRX so it locks onto the eyepiece, then loosen it slightly so DIOPTRX is free to rotate. (Note: you can

leave it locked onto Radian and Nagler Type 4 eyepieces because rotation can be done using their “Instadjust” housing.)

4) Place the chart on the reverse of this page at a distance so you can view it through your telescope, using your DIOPTRX equipped eyepiece (or use an actual star field).

Focus at the center of the field and rotate DIOPTRX to optimize the astigmatism correction for the sharpest image you’ve ever seen. DIOPTRX is most effective with

large exit pupils. Hint for setting rotation: view a star slightly out of focus, and simply rotate DIOPTRX until star disc appears circular then focus normally.

5) Keep the lens cap on, and clean as necessary, just as you would clean any other multi-coated optical glass surface.

For information call 9 a.m. — 5 p.m. ET Monday through Friday: 845 469 4551 or visit www.TeleVue.com.

Rev: 8/14/2012 9:28 AM

DIOPTRX

Tele Vue Dioptrx, Your Prescription for Better Viewing

When attached to any of the following long eye relief Tele

Vue eyepieces, DIOPTRX compensates for your eyesight

astigmatism. Most of these eyepieces have long eye relief

for eyeglass wearers, so simply adding DIOPTRX to

replace your eyeglasses should leave you with comfortable

eye relief. DIOPTRX corrects astigmatism only, since

focusing compensates for your power correction.

DIOPTRX Astigmatism correction

Every DIOPTRX includes

a rubber eyeguard and

lens cover

Your eyeglass prescription should look

something like the example below. Your

DIOPTRX value should match the CYL

(cylinder) value for your preferred viewing eye.

If you require more than 3.5 diopters correction,

call Tele Vue (845-469-4551) for info on

“stacking” DIOPTRX

SPHERICAL CYL AXIS

O.D.

(Right eye)

O.S.

(Left eye)

product code

(in diopters)

DRX-0025

0.25

DRX-0050

0.50

DRX-0075

0.75

DRX-0100

1.00

DRX-0125

1.25

DRX-0150

1.50

DRX-0175

1.75

DRX-0200

2.00

DRX-0225

2.25

DRX-0250

2.50

DRX-0300

3.00

DRX-0350

3.50

Installation Instructions

(Additional technical information is available on our website at:

www.televue.com)

1) Pull off and save rubber eyeguard from eyepiece.

2) While holding lower engraved bottom ring of DIOPTRX with one hand, unscrew upper top ring (containing lens and rubber eyeguard) just enough so the assembly slips over the

eyepiece top.

3) While still holding the lower ring, re-tighten upper ring on DIOPTRX so it locks onto the eyepiece, then loosen it slightly so DIOPTRX is free to rotate. (Note: you can leave it

locked onto Radian and Nagler Type 4 eyepieces because rotation can be done using their “Instadjust” housing.)

4) Place the chart on the reverse of this page at a distance so you can view it through your telescope, using your DIOPTRX equipped eyepiece (or use an actual star field). Focus at

the center of the field and rotate DIOPTRX to optimize the astigmatism correction for the sharpest image you’ve ever seen. DIOPTRX is most effective with large exit pupils. Hint

for setting rotation: view a star slightly out of focus, and simply rotate DIOPTRX until star disc appears circular then focus normally.

5) Keep the lens cap on, and clean as necessary, just as you would clean any other multi-coated optical glass surface.

For information call 9 a.m. — 5 p.m. ET Monday through Friday: 845 469 4551 or visit www.TeleVue.com.

Delos

all

Plössl

55, 40, 32mm

Radian

all

Panoptic

41, 35, 27, 24*, 22, 19*mm

Nagler Type 4

all

Nagler Type 5

31, 26, 20*mm

Nagler Type 6

all*

Ethos

all

*Indicated eyepieces require DEA or DNA adapters.

Delos

all

Plössl

55, 40, 32mm

Radian

all

Panoptic

41, 35, 27, 24*, 22, 19*mm

Nagler Type 4

all

Nagler Type 5

31, 26, 20*mm

Nagler Type 6

all*

Ethos

all

*Indicated eyepieces require DEA or DNA adapters.