Orion 5302 User manual

INSTRUCTION MANUAL
IN 565 Rev. A02/16
Orion Field Flattener for EON
104mm ED-X2 Triplet Refractor
#5302
The Orion Field Flattener for EON 104mm ED-X2 was designed exclusively
for the EON 104 ED-X2 Triplet Apo Refractor, to atten the focal plane for
astro-imaging without affecting the focal length of the telescope, even on full-
frame camera sensors. For photography only, not visual use, this high-per-
formance 2" eld attener is highly recommended for obtaining the highest-
quality images with your EON 104.
This eld attener has an optimal backfocus distance of 55mm (distance from
threaded attachment plate to camera sensor). It comes with interchangeable,
thread-on adapter plates, one with 42mm (T-mount) male threads, the other
with wider, 48mm male threads (which are equivalent to 2" lter threads).
Figure 1. The Orion Field Flattener for EON 104mm ED-X2
Corporate Offices: 89 Hangar Way, Watsonville CA 95076 - USA
Toll Free USA & Canada: [phone]
International: [phone]
Customer Support: [email protected]
Copyright © 2020 Orion Telescopes & Binoculars.All Rights Reserved. No part of this product
instruction or any of its contents may be reproduced, copied, modied or adapted, without the
prior written consent of Orion Telescopes & Binoculars.
AN EMPLOYEE-OWNED COMPANY

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Attaching the Field Flattener to a DSLR Camera
The eld attener’s 55mm backfocus distance is designed to work with most DSLR
cameras without the need for any additional extension rings (Figure 2.1). A T-ring
for the make and model of your camera is the only required accessory to attach
the eld attener to your DSLR camera. The ring can be either a standard 42mm
T-ring or a wide 48mm T-ring. The 48mm T-ring, when used with the 48mm adapter
plate of the eld attener, is ideal for use with full-frame camera sensors as it will
reduce the possibility of vignetting, giving you better illumination at the edges of
the sensor
Attaching the Field Flattener to a CCD Camera
Most CCD cameras have a shorter ange focal distance – the distance from the
camera’s lens mounting ange to the focal plane, or sensor—than a DSLR cam-
era. That means you will need to add extension as needed to ll the 55mm of
required distance to the eld attener (Figure 2.2). T-thread extension rings, or
spacers, of different lengths are available separately; you just need to calculate
how much extension is needed for your particular camera. Consult your camera’s
manual to determine the ange focal distance.
For example, if a camera has a ange focal distance of 20mm, i.e., its focal plane
is 20mm behind the lens mounting ange, you would need to add 35mm of space
between the camera and eld attener to achieve the proper distance (20 + 35 =
55mm). Note that if you do not reach 55mm exactly, the eld attener will still work,
but will gradually lose its effectiveness the farther in or out from 55mm your cam-
era is positioned.
Your CCD camera must have compatible 42mm or 48mm female T-threads on the
camera body to attach to the eld attener. Remove the camera’s nosepiece (if it’s
equipped with one) and thread the camera body directly onto the back of the eld
attener or threaded spacer ring.
Care & Maintenance
Care should be exercised when using all optical and mechanical telescope acces-
sories. Keep your eld attener in a protected environment when you’re not using it,
and place the dust cap and threaded metal cap on the Field Flattener for storage.
Avoid touching the lenses and coatings. If the outside of the lens should become
dirty, you may want to clean it. Remove loose dirt with a blower bulb or lens brush.
Use only optical lens tissue and good-quality lens uid. Wet a folded tissue and
gently wipe the surface of the lens. Immediately use a second piece of lens tissue
to gently dry the lens off. Do not rub or apply pressure, as this may scratch the lens
if dust or grit is present.

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Field
Flattener
DSLR
camera body
T-ring Adapter
plate
(42mm
or
48mm)
(42mm
or
48mm)
2" collar on telescope
Figure 2.1. Using the eld attener with a DSLR camera.
Field
Flattener
CCD
Camera
55mm
Xmm
Distance from CCD
chip to Field
Flattener T-threads
should be 55mm
“X”mm of additional spacing may
be required to achieve 55mm,
depending on make and model
of camera.
2" collar on telescope
Adapter
plate
(42mm
or
48mm)
Figure 2.2. Using the eld attener with a CCD camera.
Specifications
Optics 2-element, fully-multicoated
Clear Aperture 50mm
Focal Length 55mm
Mechanical Length 50.2mm
Barrel: 2", tapered neck, threaded for 2" lters
Weight 8.3 oz (23.4g)
Adapter plate threads: 42x0.75mm “T-thread” (male)
48x0.75mm (male)

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Corporate Offices: 89 Hangar Way, Watsonville CA 95076 - USA
Toll Free USA & Canada: [phone]
International: [phone]
Customer Support: [email protected]
Copyright © 2020 Orion Telescopes & Binoculars.All Rights Reserved. No part of this product
instruction or any of its contents may be reproduced, copied, modied or adapted, without the
prior written consent of Orion Telescopes & Binoculars.
AN EMPLOYEE-OWNED COMPANY
One-Year Limited Warranty
This Orion product is warranted against defects in materials or workmanship for
a period of one year from the date of purchase. This warranty is for the benet of
the original retail purchaser only. During this warranty period Orion Telescopes &
Binoculars will repair or replace, at Orion’s option, any warranted instrument that
proves to be defective, provided it is returned postage paid. Proof of purchase
(such as a copy of the original receipt) is required. This warranty is only valid in the
country of purchase.
This warranty does not apply if, in Orion’s judgment, the instrument has been
abused, mishandled, or modied, nor does it apply to normal wear and tear. This
warranty gives you specic legal rights. It is not intended to remove or restrict your
other legal rights under applicable local consumer law; your state or national statu-
tory consumer rights governing the sale of consumer goods remain fully appli-
cable.
For further warranty information, please visit www.OrionTelescopes.com/warranty.