Orion 8671 Manual de usuario

Orion®3" Field Flattener for

EON 115 & 130 f/7 Triplet

Refractors

#8671

INSTRUCTION MANUAL

Providing Exceptional Consumer Optical Products Since 1975

IN 560 Rev. A 10/15

Customer Support:

www.OrionTelescopes.com/contactus

Corporate Offices:

89 Hangar Way, Watsonville CA 95076 - USA

may be reproduced, copied, modified or adapted, without the prior written

consent of Orion Telescopes & Binoculars.

This large-format ﬁeld ﬂattener, designed for photography with the Orion EON

115mm and 130mm f/7 triplet refractors, ﬂattens the focal plane for astro-imaging

without affecting the focal length of the telescope. When imaging with a CCD or

DSLR camera, the far edges of the ﬁeld of view will appear sharper when using

the ﬁeld ﬂattener with your EON telescope.

Connection to Telescope

The 3" Field Flattener threads directly onto the 3" dual-speed Crayford focuser of

the Orion EON 115 and 130 f/7 triplet refractors, for a rock-solid connection. The

Field Flattener has M92x1.0 male threads, which mate with the female threads

on the focuser. First remove the accessory collar from the focuser by turning the

knurled ring counterclockwise, as shown in Figure 1. Then screw the ﬂattener

into the focuser.

The optimal backfocus distance (distance from the rear ﬂange of the ﬂattener,

excluding the M48 thread, to the camera sensor) is 51.5mm. However the ﬂat-

tener is known to provide sharp images at up to 5mm either side of this distance.

Connection to a DSLR Camera

The 3" Field Flattener features M48x0.75 threads on the camera side, wider than

the typical T-mount (M42), to minimize vignetting and provide better illumina-

tion of full-frame camera sensors. Thus, for DSLRs you will need an M48 DSLR

adapter – a wider version of the standard T-ring.

Connection to a CCD Camera

Most CCD cameras require less backfocus than a DSLR camera. That means

you will need to add spacing as needed to ﬁll the 51.5mm of required distance

to the Field Flattener. M48 (2") spacers are available from third party vendors.

Figure 1. To install the ﬁeld ﬂattener, A) remove the accessory collar as shown, then B)

thread on the ﬁeld ﬂattener until tight.

Accessory collar knurled ring

Speciﬁcations

Optics 2-element, fully-multicoated

Backfocus length (optimal) 51.5mm

Threads, telescope side 92x1.0mm, male

Threads, camera side 48x0.75mm, male

Mechanical length when attached 88.8mm

Focal reduction None (1x)

Weight 17.9 oz (507g)

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.

Orion Telescopes & Binoculars

Corporate Offices: 89 Hangar Way, Watsonville CA 95076 - USA

Customer Support: www.OrionTelescopes.com/contactus

be reproduced, copied, modified or adapted, without the prior written consent of

Orion Telescopes & Binoculars.

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