ZWO OAG

$128.00$187.00

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SKU: ZWO OAG Category:

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.

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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

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    Hello Sam.. Where can I possibly get a replacement part for my OAG. The camera holder on top “mysteriously” walked off at the last outing I was at. :-( Just need that top piece. Thanks!




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    • Avatar

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      Hi Jay,
      Which part do you need?
      Can you send us the pictures to show us where the problem is?
      Please send it to support(at)zwoptical.com




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  2. Avatar

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    Hello,
    I have a asi294mc and just bought an oag. I guess I need to leave in place the camera attached t2 ring and add up the 21mm ring extension to get the right focus on both the camera and guide camera (asi290)?
    Meanwhile, I have a Borg filter drawer to attach in the front with M57 thread. The oag connection is m48 correct? If so I assume I would need a M48 to M57 male to be able to do so. Would you sell these by any chance? Thxs




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  3. Avatar

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    Similar question than the one before: I’m looking for a possibility to attach a Canon EOS lens to the OAG and getting in focus with both, camera and guider. I think there should be enough light for the guider if lenses designed for full frame cameras are used. The EOS-T2 adapter looks big enough to allow such a construction. Any chance for a EOS-OAG adapter that provides the correct BF?




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      Hi Fabian,
      We are not sure.
      Even you are using full frame lens it might not support.




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  4. Avatar

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    Hello!
    The asi224mc has a back focus of 12.5mm, I can’t understand what extenders, adapters to buy to make 55mm.
    The same for the asi183mc camera without cooling. Please, help.




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  5. Avatar

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    Hello! I want to buy an off-axis guide with a guiding camera . As removing the cameras will be used in the zwo ASI 183mc and 224mc. do I need to buy more extender. Synta bkp150750 telescope.




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  6. Avatar

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    How to connect the OAG to Celestron SCT 9.25 Starlight “non-edge”
    What sort of Adapter do I need?




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  7. Avatar

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    I am considering purchasing the OAG for use with my 120MM-S and 183MC-Pro. I will be using a 1.25″ LP filter with the nose piece on the 183. Where is the best location or what will I use to make sure the filter is secured and won’t interfere with the prism for the guide camera?

    Thanks
    Eric




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    • Avatar

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      Use the 1.25″-T2 ring which in your camera box. you can set it in 11mm ring which on your camera body.




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  8. Avatar

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    Hi Sam

    Currently I image using an ASI071MC PRO, on a William Optics Zenithstar 73, with a Flat73 fieldflattener.
    And do guiding using an old USB2 version ASI120MM on a 60mm F4 TSL60D.
    I’m considering switching to using a OAG, in order to make my setup more compact.

    But I do have some questions/concerns.

    1. has the 4 screws holding the telescope adapter to the OAG body been extended? I can see in the thread that it has been raised as a concern, that these screws only hold on with 1 single thread.

    2. how do I ensure the prism is located perpendicular to the camera sensors long edge? It doesn’t look like the camera adapter can be freely rotated in the OAG body… or am I misinterpreting the images?

    Would you recommend me to just stick with my current guide-scope setup, since it is very robust, or do you think the OAG setup would equally robust and easy?

    Thank for making some awesome products.

    regards Anders Lange




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    • Avatar

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      Hi there, you could add a 21mm T2 extender(in camera box) between camera and OAG. that will be easy to adjust 4 screws on OAG.
      OAG have 3 angel can be choosen, maybe one of it could be perfect match the sensor of 071.




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  9. Avatar

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    My setup includes a Celestron 9.25 EdgeHD with 0.7x Reducer, ASI1600MC for imaging, ASI174 mini for guiding and ZWO OAG.
    – Do I use the 5mm T2 extender with the 174 mini?
    – Do I use the T2 21mm extender combined with the 11mm ring with the 1600MC?




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  10. Avatar

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    Would your ASI120 mini be a good camera to use with your OAG on a Celestron C8 2032FL f10?
    Same question for a 80mm APO 480mm f6
    If not, what would you recommend?




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    • Sam Wen

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      no problem with 80480, but you’d better consider 290 mini for C8 as the FOV is too small and hard to find a guide star




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  11. Avatar

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    May be stupid question, Has anyone used one of these on a Newtonian telescope?




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    • Sam Wen

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      of course, you can use it on the Newtonian scope
      just star is not so round because of coma error




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  12. Avatar

    :

    Hello Sean & Sam,

    My planned imaging train is as the following:

    GT81 WO Focuser WO Rotator WO Flattener ZWO OAG ZWO EFW8 ASI1600mm

    1. Will the back-focus distance work out in my case?
    2. What ZWO guiding camera would you recommend for 400mm focal length?
    3. Read your post about the improved OAG design by adding two screws to eliminate the prism wobble issue. I think it will bring much peace of mind to many ZWO users if you post some picture of the added screw locations.

    Thanks!
    -Min




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      Hi there
      Does GT81 integrate flatter inside? If so, don’t consider back-focus.
      400mm also can use OAG, no problem.
      Thank you for your suggestion about OAG description.




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  13. Avatar

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    I am confused about what focus distance is needed to have equal distance to both sensors. I have a ASI071 and the distance to the sensor needs to be 55mm. However, the distance from sensor to center of prism is 45.5 mm. Which distance do I use from the center of prism to the guiding ASI290mini sensor? Do I need any addition spacers between the prism and guiding camera? What problem may I have with the ASI071 sensor size?




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    • Avatar

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      55mm is an example, in real case, depand on the telescope and reducer. I add another diagram to show how to connect guide camera with OAG.




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  14. Avatar

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    Hi Sam/Sean, I have purchased the latest OAG but cannot connect to Skywatcher 0.85 reducer flattner as the thread is too long and rests against the prism stalk which also jams up the ability to use focus, is there a work around without effecting the 55mm needed for focus?
    Thanks for your time




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    • Avatar

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      We recieved a email form Zoltan, he told us about your reducer. The thread of reducer is too long, we provide 5mm, but the reducer need 7mm.
      In this case, I think you need two customized adapters. one is M48 female ring, about 3mm thinkness, like the 11mm ring on camera. screw it on reducer. So that the thread won’t stucked by prism.
      Second one is 9mm M42 extender, replace the 11mm ring and T2-T2 adapter, between OAG and EFW.




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  15. Avatar

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    Do you think I would have any issues achieving focus with my Altair GPCam2 and imaging with my ASI1600MMC with the OAG?




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    • Avatar

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      Imaging train like this will let both camera reach focus.
      telescope + OAG + 11mm ring(from camera) + 2mm T2-T2 adapter(from EFW) + EFW + camera.




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  16. Avatar

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    I am looking for a replacement prism and stalk for my OAG. What are my options without having to purchase a new unit? Please feel free to email me.




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      Please send a email to info(at)zwoptical.com, we will help you get a new prism.




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  17. Avatar

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    Which of your cameras ASI174 or ASI 290 do you recommend for using with your OAG at f2000mm, and why?
    Thank you




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      I think ASI174MINI is suitable for long focus length and OAG guiding.




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  18. Avatar

    (verified owner):

    Thanks a lot, Sean




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      You are welcome. Oleg.




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  19. Avatar

    (verified owner):

    Hi Sam, recently bought your setup to astrophoto (1600MM-Pro, EFW, OAG) and now need to make an adapter to provide correct distance from telescope field corrector to focal plane. Could you specify the thread step in OAG body from telescope side – M48X0.75 or M48X1
    Kind regards, Oleg




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      It’s M48*0.75




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  20. Avatar

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    Hello there, I have read in several thread (CN, Astronomy forum, even here in your support forum) about wobbling problems of the prisma stack. The following video shows the problem: https://www.youtube.com/watch?v=6CuBm8Iir48

    Have this issue been properly addressed? I am really interested in ordering this OAG however, I have my doubts considering the problem faced by other users. Any comment/feedback would be highly appreciated.

    Clear skies, Diego




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    • Sam Wen

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      we already added 2 screws to fix the OAG prism, so won’t have such problem again




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