ZWO EFW 7x36mm, Astronomik Filters and ZWO OAG-L install

[@marvinwhisman3333]

Just found your channel. Enjoying your videos.

[@JTAstro]

Glad you are enjoying!

[@gclaytony]

The ZWO website indicates the M48 plate is provided with the OAG-L. The M54 and M42 plates must be purchased separately. ??? The ZWO backspace diagram indicates the tilt plate on the 2600 has to be removed - as well or you will be 5mm over the 55mm backfocus requirement on most OTA's. Is the backfocuse for you OTA different?K The reason I'm asking these questions is I have an Esprit 100ED and I'm considering upgrading to the OAG-L and EFW. I had tried the regular OAG and it did not turn out well. Stem was almost too short to get guide camera in focus and there was significant offcenter vignetting, so I returned the OAG and went back to a guide scope. The OAG-L looks like it might address the issues with the OAG, but also looking at the QHY OAG-M or L.

[@JTAstro]

Clayton, correct you remove the plate from the 2600M, and then rest goes hand and hand. Here is more info on the put together to reach 55mm astronomy-imaging-camera.com/tutorials/asi2600-guide-4-connection-methods-to-get-55mm-back-focus-length.html

[@hypersphereengineering6015]

I'm using an ASI 294 MM Pro with 8 position filter wheel and the small ZWO off axis guider and I'm also experiencing severe vignetting in the corners. Any idea why this is happening?

[@JTAstro]

@@hypersphereengineering6015 hard to say what is causing this as I don't know the telescope and how you have everything mounted. Here is some info from cloudynights that may help. www.cloudynights.com/topic/561134-vignetting-with-focal-reducer/

[@hypersphereengineering6015]

@@JTAstro I have 2 scopes. Astro Physics 130GTX without a flattener at the moment and a Takahashi FSQ106N. I'm currently imaging with the Takahashi. It has a built in Field flattener that doesn't require specific back focus distance because the focuser operates independently of the flattener. This makes life easier. I had a feeling that the camera , filter wheel and OAG were too far away from the flattener due to the focuser drawtube distance. To prove this I removed the filter wheel so the camera was a bit closer and the vignetting is less. If I can move the imaging train closer to the visual back I might be able to eradicate the problem.

[@XShadowAngel]

Interesting, my m48 tilt plate came with my OAG-L.

[@JTAstro]

Yeah I found it finally, so have two M48 plates 😂

[@sergiluque2928]

I think there is a mistake with the screws you use to join the OAG to the filter wheel. The screws must be allen head and you use the Phillips type.

[@JTAstro]

Could be. With the kit I received they were all Philips possible they moved to Allen so you don't need multiple tools in the field.

[@sergiluque2928]

Hi Joey, I think the allen type screws came with the OAG L, and the phillips with the filter wheel (they are used to join the wheel with the camera). I hope you are enjoying this magnificent equipment. Thanks for your video!

[@JTAstro]

@@sergiluque2928 of course I am! You can check out more on my blog joeytroy.com has links to my Astrobin as well.