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 , strong connection to the telescope

OGA-1OGA-2

OGA-3
ZWO OAG comes with all adapters you will need for imaging and guiding.

 

Package includes:

OGA

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(in the box)

Mechanical Diagram

OAG-DRAWConnecting 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

oagset4_1200x1000

4.  Mount the guide camera

oagset5_1200x1000

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

oagset6_1200x1000

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

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

 

Before first usage of this product read Manuals and install correct Drivers and Software.

Shipping

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.

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

If you can’t get the air mail package after 2months, please let us know ASAP: info@zwoptical.com

Introduction

  1. Fast Shipping: we will choose DHL, UPS, FedEx etc to deliver it. Usually you will get your package within one month.
  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

  • We provide 2-year warranty for our products, we will offer the repair service for free within warranty period. After the warranty period, we will continue to provide repair support and service on a charged basis. We do not provide any replacement unless ZWO confirmed the product is DOA (Dead On Arrival).
  • This warranty does not apply to damage that occurred as a result of abuse or misuse, or caused by a fall or any other transportation failures after purchase.
  • Customer must pay for shipping when shipping the camera back for repair or replacement. If we confirm you can get a replacement, goods must be returned with all accessories, instructions, etc and must be suitably packed.
  • If you get a faulty camera, please contact us as soon as possible though email: info@zwoptical.com. Please describe the problem in detail and we will do our best to help you solve the problem. Most instances perceived problems are simply bad driver install or software configuration.
  • We will provide you RMA number if your camera requires warranty repair. We refuse any return without RMA number!
  • For customers who bought the camera from our dealer, dealer is responsible for the customer service for you.

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

  1. Avatar

    :

    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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    • Avatar

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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

      :

      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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