Product Description
M68 OAG Off-Axis Guider
Features:Â
1. Lightweight and Exquisite, 17.5mm thickness
2. Prism size: 8*8mm
3. Connect the main imaging camera and the guide camera simultaneously. No guide scope required!
4. High stability, strong connection to the telescope
5. Can be compatible with ASI6200MM Pro, ASI2600MC Pro and ASI2400 cameras
6. For guiding, only can work with ASI mini camera currently.
7. There’re M2.5*6 screws in the package to help connect the OAG to 2″ EFW.
Mechanical Diagram:
Usage Guider:
5 connection methods of ASI6200 to get 55mm back focus length:
https://astronomy-imaging-camera.com/tutorials/5-connection-methods-to-get-55mm-back-focus-length.html
Note：focusing tolerance ±0.3mm
Shipping & Delivery
Fast Shipping: we will choose DHL, UPS, FedEx etc to deliver it. Usually you will get your package within 15-20 days.
- Fast Shipping(amount ≧ 199USD) for free
- Fast Shipping(amount < 199USD) : $30.00 (We do not provide free shipping from now on.)
Introduction
- 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
- Customers from Brazil and Chile should leave a message to provide your CPF or CNPJ as your custom needs it.
- 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:Â 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 from local dealers.
Warranty & Return
1. ZWO hereby declares that it will provide customers with a warranty period of 2 years for ZWO branded products (excluding APO), as per this policy. APO products will be covered by a 1-year free warranty service, starting from the day following the receipt of the product by the customer. For ASIAIR Plus users, the warranty period will commence from 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.
Our website is continuously 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 have been installed before you start shooting:
It is also recommended to read the Manuals first before shooting.
Thomas – :
Can this OAG be used with a 120 Mini as guider and a 462 as main camera? If so, are all adapters necessary included or is another adapter required? Thank you for your kind response.
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Support@ZWO – :
462MC is for planetary photography, no need OAG.
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ioan – :
what size screws are the larger hex screws that are used in the titl adapter?
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Support@ZWO – :
M2.5*6mm
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Andrew Read – :
What size of sensor in the guide camera will be illuminated by this OAG?
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sara.liu – :
M68 OAG is suitable for full frame camera.
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KIRK GRAY – :
Hi,
Will you ever publish a manual specific to the OAG M68? The manual you have shows a different OAG model with different characteristics.
I saw an answer above from Katharine that said “only one side with M68 female thread, the other side will be connected via screws.” Which side has the M68 female thread (telescope or camera) and which side is bolted? Can you configure the OAG M68 to have the bolted side face the telescope or camera?
Thanks!
Kirk
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ZWO.Moson – :
Thanks for your feedback, we will consider to publish a manual.
The telescope side has the M68 female thread, and the camera side is bolted.
There is link for your reference: https://astronomy-imaging-camera.com/tutorials/5-connection-methods-to-get-55mm-back-focus-length.html
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Shail Srinivas – :
Is there an adapter that connects via screws to a female M68 or M69 thread so that both sides have female M68 or M68 and M69 threads?
Thanks,
Shail
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ZWO.Moson – :
Sorry we don’t have this kind of adapter.
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Dale Hollenbaugh – :
What is the diameter of the hole where the light passes from the prism up into the guide camera? The prism on your regular OAG is also 8mm x 8mm, but the hole is only 5.6mm in diameter, so limits what size sensor to use. It seems the ASI174MM Mini sensor is too large and a bit wasted on such a small aperture. I’m hoping the M68 OAG has larger opening. Thank you.
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ZWO.Moson – :
The diameter of the hole in the M68 OAG is the same as the regular OAG.
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avik.basak – :
can you move the prism up or down in the M68 OAG? If so how to do that?
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Katherine Tsai – :
Yes, you can loose the retaining screw for prism stalk, it is near the red ring, then you can pull or push the prism stalk.
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Toyof – :
Hi!
Another question please: what is the shorter distance between the center of the M68 thread and the prism? Thanks a lot!
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Katherine Tsai – :
Could you send an email to support@zwoptical.com and show us the distance you refer to?shall we confirm the distance you refer to by graph? So we can give you more precise data according to your need? The prism stalk can be adjusted and the distance can be changed.
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Toyof – :
Hello,
It would be very appreciated if you’ll provide a more detailed drawing of your M68 OAG and a manual! This is my question: what is the distance between the M68 female thread and the movable prism holder?
Thanks a lot!
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Katherine Tsai – :
Could you send an email to support@zwoptical.com and show us the distance you refer to? Shall we confirm the distance you refer to by graph? So we can give you more precise data according to your need? The prism stalk can be adjusted and the distance can be changed.
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Kevin McCarthy – :
What is the weight of the M68 OAG?
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Moson – :
The weight of the M68 OAG is about 100g.
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Chris – :
Just to confirm, will this work with the ASI120mm-Mini as an OAG?
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Moson – :
Yes, the ASI120MM Mini can work with M68 OAG.
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LukasN – :
Good day,
what is the thread length M68?
Well thank you,
Lukas
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Moson – :
What do you mean of thread length? We can tell you some details of M68 OAG, the thread spacing is 1mm, and the thread depth is 5mm. I hope it can help you.
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Todd Bouman – :
What is the minimum back focus distance for the guide camera? I assume the focuser has 6mm of travel?
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Moson – :
The back focus is depend on your telescope which has flattener or reducer. The travel of this focuser is enough to use normally.
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sebastien – :
Hi,
Why this OAG is not compatible with ASI2600 ? the front plate on 2600 has same fixation hole system than 6200.
Thank you,
Sebastien.
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Moson – :
Sorry we don’t have a adapter that suit for M68 OAG and ASI2600. But you could connect M68 OAG and ASI2600 with 2″EFW.
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Avik Basak – :
Can I use this ASI120MM-S as a guide camera with this OAG?
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Katherine Tsai – :
Yes but you need to pay attention to the back focus.
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Kevin McCarthy – :
Hi. I just received the M68 OAG, which I will be pairing with your ASI6200MC-Pro. Users should note that in the case of this color camera (hence, no filter wheel), the M68 OAG cannot bolt directly to the camera tilt plate, as that won’t allow any guide camera to reach focus. Instead, longer M2.5 fasteners and a disk spacer with four 2.6 mm clearance holes on a 31 mm radius will be required between the M68 OAG and the tilt plate. I measure the prism center to be 7.5 mm from the camera side of the M68 OAG, but this dimension should be called out in your side view drawing. I also measure the lateral mechanical distance from the prism center to the closest a guide camera barrel can get and still allow full focus travel to be 31.0 mm. While the focus ring suggests 10 mm of focus travel, my unit hits a hard stop at +6 mm. This travel range should also be mentioned as a spec. I next took into account the fact that the prism presents an optical thickness of 3.1 + 3.1 = 6.2 mm, which is different from its mechanical light path of 4+4 = 8 mm. As a result, for use with the ASI6200MC Pro, I conclude that the spacer disk thickness to put the focus ring at the center of its range (+3 mm) should be 7.2 mm + the guide camera’s sensor depth. For ASI guide cameras with a sensor depth of 8.5 mm, this means an M68 OAG to ASI6200MC-Pro spacer thickness of 15.7 mm. Please either confirm my calculations, or correct them if I have missed something. Putting this info in an app note similar to the one you already provide for connecting the M68 OAG to filter wheels for use with the ASI6200MM Pro would save other customers from each having to repeat my reasoning, measurements, and calculations.
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Katherine Tsai – :
You will need a filter drawer to replace the EFW.
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Bill S. – :
Can the Loadstar x2 Guide Camera fit into the guide cam holder?
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Katherine Tsai – :
Yes.
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Charles Bonafilia – :
Will this work with your new 2600?
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Katherine Tsai – :
No.
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n2068dd – :
Can I used with ASI-290MM? It looks back focus will not be matched with M42 thread camera. Must I purchase another mini camera?
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Katherine Tsai – :
You may need to know the back focus of your telescope/flattener/reducer and calculate the back foccus, since the guide camera and main camera will reach the same back focus.
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Marco Maicas – :
Is it M68 female threaded on both sides?
Thank you,
Marco
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Katherine Tsai – :
There is only oneside with M68 female thread, the other side will be connected via screws.
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