Help w/new barlow - help w/focus

[iPonchco]

So, I'm not sure how to connect & obtain focus. Unfortunately, I did not find much online. 

My equipment: 

8" dob

17.5 Morpheus and 2" 2x Astromania Barlow (pic1)

W/ 2" colar (pic2)

Direct into focuser (pic3)

Any point in the right direction would be appreciated. 

 

Edited September 20, 2021 by iPonchco
Misspelling

[wookie1965]

That is a big Barlow but when I had my 200p it would mount like the second picture, With the 2" extension in put the barlow in and then the Eyepiece.

[Ricochet]

The second picture is the most correct set up, but why have you not pushed the barlow into the adaptor all the way to the shoulder? If the barlow won't push in any further then the focuser may not have enough in focus to accommodate the barlow being pulled out. In that case you would have to try the third picture and extending the focuser all the way out to see if you can focus, possibly pulling the barlow out a bit too. 

Also, you will probably find that the barlow will be operating at less than 2x in that configuration as the field lens of the Morpheus is in the 1.25" barrel and will be closer to the barlow lenses than designed. 

[iPonchco]

Thank you for replying.

Like this?

I'm going to try tonight.

 

[iPonchco]

Update:

I was able to obtain focus, but it would not be user friendly. Also, color gets funky around the edge and edge of moon.  

Regrettably, I'm returning. 

I would like to get a really good barlow; any recommendations on a 2"?  I like the idea of have the lens removable to change the magnification.

Thanks

iPonchco

[iPonchco]

Update:

Thought I'd post an update, good news and maybe a pic that can help another (beginner).

I retuned the other two barlows and purchased the 2" Celestron 2.5X Luminos barlow. 

You can tell in the pic that the 17.5 Morpheus doesn't seat all the way down, but I obtained focus easily. 

The image was clear and no color distortions.  No moon out to test it, so I focused on Jupiter (good color) and the rings of Saturn.

It was so much easier to balance (only used 1 pound weight added with a velcro strap).

 

Thanks for others that contributed and hope this is a good share.

iPonchco

 

For reference-

returned:

Zhumell 2" 2x ED

Astromania 2" ED 2X

My EQ:

8" Skywatcher Flex 200-P