ORION 5339 1.25 Inch Variable Universal Camera Adapter Instruction Manual

ORION 5339 1.25 Inch Variable Universal Camera Adapter

The 1.25″ Variable Universal Camera Adapter allows attachment of a DSLR camera body to reflector, refractor, or Schmidt-Cassegrain tele-scopes for either prime-focus or telescope eyepiece-projection, a.k.a. “afocal,” photography. This accessory is useful for terrestrial and plan-etary and lunar photography, and even deep-space photography. This universal adapter is composed of two detachable parts: a prime-focus adapter (or “T-adapter”) for prime-focus photography, and a vari-able extension tube with a T-thread on the camera- attachment end for eyepiece-projection photography (see Figure 1). The adapter slides into the telescope focuser’s eyepiece/accessory collar or visual back as an eyepiece or diagonal normally would. A T-ring for your specific camera model (sold separately) is required to couple your camera body to the T-threads (M42x0.75). A thumbscrew in the extension tube holds the telescope eyepiece in place.

• Corporate Offices: 89 Hangar Way, Watsonville CA 95076 – USA Toll Free USA & Canada: 800-447-1001
• International: +1(831) 763-7000
• Customer Support: support@telescope.com

Copyright © 2021 Orion Telescopes & Binoculars. All Rights Reserved. No part of this product instruction or any of its contents may be reproduced, copied, modified or adapted, without the prior written consent of Orion Telescopes & Binoculars.

The parts of the Variable Universal Camera Adapter
This combination of prime-focus and eyepiece-projection camera adapter has a sliding barrel design that allows variable projection distances. That is, the camera can be slid forward or back relative to the eyepiece lens, which changes the size (magnification) of the projected image on the camera sensor. This allows you to vary the magnification and image scale without swapping telescope eyepieces when performing eyepiece-projection photography.
The Variable Universal Camera Adapter is compatible with 1.25″ telescope focus-ers (or larger focusers equipped with a 1.25″ adapter) and any 1.25″ telescope eyepiece with a housing diameter up to 38.4mm. The barrel of the T-adapter is threaded for Orion 1.25″ filters. The barrel of the variable extension adapter is internally glare threaded to ensure good contrast.

Assembling the Variable Universal Camera Adapter

The only assembly required is to install the two thumbscrews into the variable extension tube. Then make sure the thumbscrews line up with the two retaining grooves in the eyepiece projection body. There should already be a thumbscrew in the eyepiece projection body itself; this thumbscrew is used to hold the eye-piece in place inside the adapter.
Refer to Figure 2 to see how to attach the Variable Universal Camera Adapter to your telescope and camera.

T-Adapter (for Prime Focus Photography)

To use just the T-adapter, or nosepiece, unthread it from the eyepiece projection body. Then thread a T-ring for your particular camera (sold separately) onto the T-adapter. Attach your camera to the T-ring, then insert the T-adapter into the 1.25″

WARNING: Never look directly at the Sun with the naked eye or with a telescope – unless you have a proper solar filter installed over the front of the telescope! Otherwise, permanent, irreversible eye damage may result.

Figure 2. Schematic for connecting the Variable Universal Camera Adapter to a camera and telescope
eyepiece/accessory collar of your telescope and secure it with the thumbscrew(s) on the collar. Be sure to secure it tightly to prevent the adapter (and your cam-era) from slipping out of the telescope during use!

**Variable Universal Camera Adapter (for Eyepiece-Projection

Photography)**

First install a 1.25″ eyepiece in the adapter and secure it tightly with the thumb-screw on the eyepiece projection body. Removing the variable extension adapter first may make it easier to install the eyepiece; just loosen the two thumbscrews on the variable extension adapter housing until it can be slid off, then reattach it once the eyepiece is in place.

Caution: Loosening this thumbscrew while the camera is attached may cause the eyepiece to drop loose and damage the camera and the eyepiece! Then attach your camera’s T-ring onto the T-threads on the variable extension adapter. Now insert the T-adapter into the 1.25″ eyepiece/accessory collar of your telescope and secure it with the thumbscrew(s) on the collar. Be sure to secure it tightly to prevent the adapter (and your camera) from slipping out of the tele-scope during use!
To adjust the magnification of the image, loosen the two thumbscrews very slight-ly on the variable extension adapter and slide the camera forward or backward while looking through the camera viewfinder (or the LCD in Live View) until the desired magnification is achieved. Slight refocusing of the telescope may be nec-essary. Then, tighten the thumbscrews and you are ready to take a picture. Note that with the camera attached to the back of your telescope (or to the side for reflectors), you may need to adjust the balance of the telescope assembly on the mount..

Focusing

Use the following formula to calculate approximate apparant focal lenghts and focal ratios when using eyepiece projection. All measurments are in millimeters.

• FL = Effective focal length
• EFR = Effective focal ratio
• TFL = Telescope focal length
• D = Diameter of objective lens or mirror (Telescope aperture)
• efl = Eyepiece focal length
• DF = Distance between eyepiece lens and camera sensor plane

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

• Corporate Offices: 89 Hangar Way, Watsonville CA 95076 – USA
• Toll Free USA & Canada: 800-447-1001
• International: + 1(831) 763-7000
• Customer Support : support@telescope.com

Copyright © 2021 Orion Telescopes & Binoculars. All Rights Reserved. No part of the instruction or any of its contents may be reproduced, copied, modified or adapted, without the prior written consent of Orion Telescopes & Binoculars.

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