ZWO OAG

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Product Description

ZWO Off-Axis Guider for Astrophotography

1.Lightweight, 16.5mm thickness

2.Large prism: 8*8mm

3.Connect the main imaging camera and the guide camera. No guide scope required!

4.Flexible adaption to your camera and telescope, such as M42 and M48.

5.Fully compatible with all ZWO ASI cameras

6.Good stability and rigid connection to the telescope to minimize flexing of the imaging train


1 2 3OAG连接相机-正视图

ZWO OAG comes with all adapters you will need for imaging and guiding.

 

Package includes:

EN-OAG及配件

1.       OAG body(with 1.25″ holder and 5mm extender and M42 adapter)

2.       M48 adapter for main imaging camera(in the box)

3.       M48-M42 adapter for telescope and flat lens(in the box)

4.       Hexagon wrench and Spacer(in the box)

Mechanical Diagram

Mechanical Diagram

Connecting Diagram:

OAG

Usage Guider:

1.   please caculate the correct required distance for your imaging train at first

for example: you need to attach 21mm extender to ASI071 to reach 55mm back focus distance:17.5mm+21mm+16.5mm=55mm

 

2. Take off the guider prism part and attach OAG body to the telescope

oagset3_1200x1000

3. Insert the prism part into the OAG body

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4.  Mount the guide camera

oagset5_1200x1000

5.   Screw the T2 or M48 adaper on the imaging camera according to your mount type.

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6. Mount the camera on the OAG in correct position and lock the 3 screws in place.

oagset7_1200x1000

7. The final setup

oagset8_1200x1000

Note: please make sure the prism won’t block the imaging area

Use the guiding screw to adjust the guiding camera’s focus.

You’d better do it at day time to make sure imaging camera and guiding camera can reach focus at the same position.

oagset8_1200x1000c

 

Our website is always updated with the most recent camera drivers as well as software for DSO and planetary imaging. Please make sure the most recent driver and software has been installed before you start shooting:

It is also recommended to read the Manuals first before shooting.

Shipping

Fast Shipping: we will choose DHL, UPS, FedEx etc to deliver it. Usually you will get your package within 7-14 days.

  • Fast Shipping(amount ≧ 199USD) for free
  • Fast Shipping(amount < 199USD) : $20.00 (We do not provide free shipping from now on.)

Introduction

  1. It will take around 60-90 days for shipment via ePacket/China Post Registered Air Mail/EMS, which can’t be guaranteed due to force majeure. If you can’t get the air mail package after 2months, please let us know ASAP: info@zwoptical.com
  2. Customers from Brazil and Chile should leave a message to provide your CPF or CNPJ as your custom needs it.
  3. Customers from Russia need to provide the complete English name with three words as well as the English shipping address.

Tracking site

DGM: http://webtrack.dhlglobalmail.com/?locale=en-US

China air mail: http://www.17track.net/en

 

Tax

  • The price list on our website is USD without tax.
  • Please note that buyers are liable to pay tax involved, such as Import tax, VAT , customs handling fee, etc. The additional fees may be collected at time of delivery by courier.
  • For best local service we advise customers buy our cameras form local dealers.

Warranty and Return Policy

1. ZWO will provide a 2-year free warranty service (Warranty Period) for ZWO products purchased by Users from ZWO (“Products”) in accordance with this Policy, commencing on the day following receipt of the Products by Users. For ASIAIR Plus users, commencing on the day of device activation.

2. If a User encounters the following Dead on Arrival (DOA) and contacts ZWO within the corresponding time limit to issue the Product purchase invoice and relevant evidence, ZWO will provide door-to-door pick-up service and, as appropriate, after-sale replacement (or partial replacement), repair or return (or partial return) service for the following Products:
1) Product quality problem
Provided that a User detects a quality problem and contacts ZWO within 30 days after receipt of the Products, and ZWO support team confirms that the Products indeed have a quality problem or defect after their inspection, ZWO will provide free replacement service towards such Products;
2) Product transportation problem
Provided that a User finds obvious signs of bubbling, serious overstocking, or deformation on the outer package of the Products upon receipt of the Products, and provides ZWO with pictures of the outer package and proof of receipt within 3 days after receipt of such Products, ZWO support team will verify the actual shipper and determine the responsible party for such transportation problem. In the event that ZWO is the actual shipper, ZWO will be responsible for providing the relevant return or replacement service, however, if the Products are directly sold or transported to the User by an agent of ZWO, the agent will be responsible for providing the relevant return or replacement service.

3. If the Products are under the following circumstances, they are not within the scope of warranty service, ZWO may provide maintenance services to the Users:
1) The Warranty Period of the Products has expired; or
2) The Products are injected into liquid or affected by moisture or corrosion; or
3) The Products are damaged by an external force (such as the broken of the camera protection window glass, the deformation of the product shell, the broken of the USB port, etc.); or
4) Disassembling, repairing by a third party, refurbishment of the Products (such as downloading erroneous firmware) without the written authorization of ZWO; or
5) The product system is modified, or the maintenance notice is lost or changed; or
6) Product quality problem caused by installation not following the requirements or instructions for the Products; or
7) Physical damage or failure of the Products caused by the force majeure (such as strong vibration or extrusion such as flood, fire, earthquake, or thunder stroke); or
8)Damage caused by the improper User operation during the period of shooting or use, such as using without the equipment protection or direct shooting of the sun; or
9) No valid purchase invoice or warranty certificate; or
10) The Products are second-hand products.
Any quality problem with the accessories or other parts of the Products is not a condition for the return or change of the Products, and the User may solely request to replace the accessories with new ones, which shall be handled after verification by ZWO support team.
If the issue with your ZWO product was caused by certain damage (such as severe damage not covered by the 2-year warranty), you might have to pay the replacement value.

4. For the normal repair or replacement of the Products during the Warranty Period, the User will bear the return cost. When returning the Products, Users shall specify the actual reasons for the damage to the Products, and shall provide the corresponding valid certificates, such as pictures or videos, etc.
For the Products that need to be replaced after being confirmed by ZWO in writing, the User shall return the Products with the complete package, together with all accessories, manuals, etc., to the address designated by ZWO.
By sending back the product to ZWO, the User agrees to pay out-of-warranty fees that may arise during the repair process of the product. ZWO will send back the product after charging.

5. If a User encounters any problem during the use of ZWO Products, you may at any time contact ZWO for technical support via ZWO Support.

For the Products that need to be returned for after-sales service, ZWO will provide the corresponding RMA code for reference.
ZWO will not accept any products having no RMA code that have been returned privately without ZWO written confirmation.

6. If a User purchases the ZWO Products from a ZWO agent, the User may contact the ZWO agent directly for the relevant after-sales service.

Do you have question, answer or comment? Post here!

  1. Avatar

    :

    Is there any configuration that could allow this OAG to be used with a Canon EF lens? I do quite a bit of imaging with a 400mm f2.8 lens, ASI 1600MM-C, and EFW filter wheel. I’m really hoping to go OAG with this setup.




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    • Avatar

      :

      I think it is hard to used in canon lens. because the last glass of lens is small, OAG can not get any light form the lens.




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  2. Avatar

    (verified owner):

    It would be good if you guys could make a low profile, non-rotating helical focuser for use with this OAG. Baader have one that looks like it could work, but I reckon you guys could make one a good bit cheaper 😁




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    • Sam Wen

      :

      thanks for the hint, we will try




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  3. Avatar

    (verified owner):

    I managed to adjust the angle of the prism just a tiny bit closer towards the centre of the coma corrector (it was angled slightly out from centre rather than parallel with the main camera) and I now get a much better image that completely fills the guidecam sensor, is brighter and has much closer to round stars. Thanks




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  4. Avatar

    :

    When it is available to the order for AliExpress?
    It is inconvenient to me to pay through PayPal




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    • Sam Wen

      :

      we will upload soon




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  5. Avatar

    (verified owner):

    Hi Sam, can the tilt angle of the prism be adjusted on the OAG? I noticed there is a little grub screw holding the prism to the stalk, but I have not yet been brave enough to attempt any adjustment of it.

    Currently I’m using a asi1600mm-c with efw-mini​and explore scientific coma corrector. I have the prism perpendicular to the sensors long edge and right on the very edge of the light column to minimise sensor shading & light reflections. My guide cameras image is quite dark compared to my 60mm F4 guidescope, although binning 2×2 helps.

    But the real problem is that despite my asi1600 having sufficiently round stars out to the corners of the frame, my guider’s stars look more like eyebrows. I assume that is a combination of vignetting and coma, so hopefully it can be tilted slightly closer to the better corrected middle of the light column.

    Thanks




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    • Sam Wen

      :

      usually there is no need to adjust the angle of the prism and I don’t think tilt can help to correct coma
      I think one thing important is you need to try to put the prism close to the sensor(upside or downside of the sensor)




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  6. Avatar

    :

    Sam Wen – December 27, 2016:
    the camera will rotate when you adjust the focus

    What do you mean? I just purchased the OAG and nothing rotates. How is focus obtained?




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  7. Avatar

    (verified owner):

    Sam,

    I would like to buy a M42 adapter for my OAG, my current one is totally destroyed, it got bent with me making the screws tight. How can I buy a new one? Thanks!




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    • Sam Wen

      :

      we will reply you in email




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  8. Avatar

    (verified owner):

    How long is exactly the thread on the “M48 adapter for main imaging camera”?




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    • Sam Wen

      :

      It’s around 4.5mm length




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  9. Avatar

    :

    Dear Mr. Sam,

    I am using my ASI1600MM-C with my ES ED 80 refractor and ES field flattener. The field flattener’s recommended back focus distance is just 45mm. My guide camera is ASI120MM. Can I achieve a good focus in the guide camera with this OAG? (I failed to do so with my Orion thin OAG).

    Thank you.




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    • Sam Wen

      :

      yes, you can




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  10. Avatar

    :

    I’m wondering what the ACTUAL sensor coverage is with this OAG.
    I will definitely order one, over the other similar clones, if the prism tower does not severely restrict the specified SQUARE 8x8mm pickup prism size.
    From one of the pictures it looks like this one also has a CIRCULAR light path just short of 8mm diameter.
    I know that making a round hole is easier(!), but I would pay more to lessen the rather severe obstruction.
    Thanks :)




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    • Sam Wen

      :

      the hole is 6mm*6mm which is suitable for most sensor
      even 1″ sensor may only suffer from vignetting problem




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  11. Avatar

    (verified owner):

    Hi Sam,

    I have your new OAG and plan to use your ASI 224 for auto-guiding and have a couple questions.

    With your OAG will I have trouble finding a suitable guide star at 2800mm on my Celestron 11″ Edge (@ f10)? How large a sensor can your OAG use? It seems the opening from the small mirror up to the camera is very small so a larger sensor would definitely be cropped. I assume the ASI 224 is ok and not cropped!

    I wish I could move the mirror sideways a bit to acquire a star to guide on, as the field of view is really tiny, especially at 2800mm F/L

    How high would you suggest I set the gain on the ASI 224 with OAG? Should I forget using the OAG with my C11 and just stay with my wide field refractor only?

    Thanks,
    James




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    • Sam Wen

      :

      you can use up to 1″ sensor for the OAG
      I would recommend a mono camera for guiding instead of color
      so maybe ASI290MM is better
      you can set the gain to around 400 for 224




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  12. Avatar

    (verified owner):

    Thanks Sam. I still haven’t been able to find a source for longer screws. If you have lsome maybe you could drop 4 in the (slow) mail for me.




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    • Sam Wen

      :

      OK, please email our customer service info mail




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  13. Avatar

    (verified owner):

    The screws to hold the telescope adapter are too short (4mm). They only provide about 1 thread engagement for each of the 4 screws. They should be at lest 6mm or possibly 8mm long. I wouldn’t trust hanging $2000 worth of cameras & accessories off these fasteners. Good luck finding longer replacements at your local hardware store. These are specialty screws with a small head (4mm) and shoulder (1.3mm). Standard M4 x .7 screw heads are 7.5-8.0mm in diameter and have a longer shoulder (2.3mm). Using standards M4 x .7 flat head screws won’t sit flush with the telescope adapter causing conflicts when threading on the back of the telescope. ZWO needs to ship longer screws for the telescope adapter.




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    • Sam Wen

      :

      sorry for this issue, usually 4 screws is tight enough to hold the camera
      anyway we will check and replace with longer screws




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  14. Avatar

    :

    @Jonathan, I think this will work. ASI1600MM-C+EFWmini+T2 to T2 (from EFWmini kit)+11mm T2 ring (from ASI1600 kit)+AOG+T2 extender 18.5mm (from ASI1600 kit) will give you the correct setup.

    I havent measured it but I think the T2 to T2+11mm T2 ring will give you your 12mm.




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  15. Avatar

    :

    I have and ASI 1600 MM Cooled with the Electronic filter wheel. To have this properly space I would need a 12mm spacer to go between the OAG and the filter wheel. (55mm – 6.5mm – 20mm – 16.5mm = 12) It looks like you are offering a 21mm spacer for your color cameras, but will you be offering a 12mm spacer for customers who have Monochrome camera setups like mine?




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    • Sam Wen

      :

      1600 come with one 11mm extender and there is one T2-T2 adapter come with EFW
      total back focus can reach 56mm




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  16. Avatar

    (verified owner):

    How does the guide screw focus adjustment work? Does turning the screw in and out adjust the focus? Or is it a locking screw to hold the guide camera in place once you manually raise or lower the guide camera? I hope it’s the former.




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    • Sam Wen

      :

      the camera will rotate when you adjust the focus




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  17. Avatar

    (verified owner):

    If I’m using the OAG with a ASI1600MM-C as the main camera and a ASI 290MM as a guide camera, do I need the M42-M42 extender (21mm length) to get the two cameras in the same focal plane?




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    • Sam Wen

      :

      yes, the OAG cannot be too close to the main camera
      you need the extender to reach focus




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  18. Avatar

    :

    That’s true. Thanks Sam :)




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  19. Avatar

    :

    Will you offer a new KIT with the OAG?




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    • Sam Wen

      :

      you can order the OAG separately as there is already too many kits;)




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  20. Avatar

    :

    How fits the big filter wheel? how to choose the position of the wheel to give free space to the guide camera?




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    • Sam Wen

      :

      the only available position is upside of the EFW
      there is around 30 degree angle to adjust the OAG




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