ORION TELESCOPES & BINOCULARS 5302 Manual de usuario

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 ﬂatten 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-performance 2" ﬁeld ﬂattener is highly recommended for obtaining the highest-quality

images with your EON 104.

This ﬁeld ﬂattener has an optimal backfocus distance of 55mm (distance from threaded attach-

ment 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" ﬁlter threads).

Figure 1. The Orion Field Flattener for EON 104mm ED-X2

Customer Support:

www.OrionTelescopes.com/contactus

Corporate Offices:

89 Hangar Way, Watsonville CA 95076 - USA

Providing Exceptional Consumer Optical Products Since 1975

copied, modified or adapted, without the prior written consent of Orion Telescopes & Binoculars.

Attaching the Field Flattener to a DSLR Camera

The ﬁeld ﬂattener’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 ﬁeld ﬂattener 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 ﬁeld ﬂattener, 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 ﬂange focal distance – the distance from the camera’s lens mount-

ing ﬂange to the focal plane, or sensor—than a DSLR camera. That means you will need to add exten-

sion as needed to ﬁll the 55mm of required distance to the ﬁeld ﬂattener (Figure 2.2). T-thread exten-

sion 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 ﬂange

focal distance.

For example, if a camera has a ﬂange focal distance of 20mm, i.e., its focal plane is 20mm behind the

lens mounting ﬂange, you would need to add 35mm of space between the camera and ﬁeld ﬂattener

to achieve the proper distance (20 + 35 = 55mm). Note that if you do not reach 55mm exactly, the ﬁeld

ﬂattener 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 ﬁeld ﬂattener. Remove the camera’s nosepiece (if it’s equipped with one) and thread the

camera body directly onto the back of the ﬁeld ﬂattener or threaded spacer ring.

Care & Maintenance

Care should be exercised when using all optical and mechanical telescope accessories. Keep your

ﬁeld ﬂattener 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 ﬂuid. 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.

Speciﬁcations

Optics 2-element, fully-multicoated

Clear Aperture 50mm

Focal Length 55mm

Mechanical Length 50.2mm

Barrel: 2", tapered neck, threaded for 2" ﬁlters

Weight 8.3 oz (23.4g)

Adapter plate threads: 42x0.75mm “T-thread” (male)

48x0.75mm (male)

Field

Flattener

DSLR

camera body

T-ring Adapter

plate

(42mm

48mm)

(42mm

48mm)

2" collar on telescope

Figure 2.1. Using the ﬁeld ﬂattener 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

48mm)

Figure 2.2. Using the ﬁeld ﬂattener with a CCD camera.

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 beneﬁt 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 modiﬁed, nor does it apply to normal wear and tear. This warranty gives

you speciﬁc legal rights. It is not intended to remove or restrict your other legal rights

under applicable local consumer law; your state or national statutory consumer rights

governing the sale of consumer goods remain fully applicable.

For further warranty information, please visit www.OrionTelescopes.com/warranty.

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