30 replies to this topic

[Majeskty]

A standard 1.25” prism would hold Morpheus fine. The QC can be hit or miss though. But if you got a good one, little need to upgrade unless you want to use 2” eyepiece. Also, a 2” diagonal could have clearance issues on your mount.

Thanks Scott!

Yeah, the clearance on mine would be a problem if going straight up since I cannot move the optical tube forward on the NexStar 8i, newer model’s made changes for such. Don’t know if that’s a real problem for what I have bee observing, however, good to know.

Lot of great information for the research and figuring my pathway.

Best to you

James

[Jon Isaacs]

Used as a 2", the Morpheus 1.25" barrel will strike many prisms, and even comes close with many mirror diagonals.

It depends on the length of the eyepiece tube in the diagonal, of course.

Many years ago I encountered that problem with a 2" prism and Tele Vue 1.25" eyepieces with a 2" skirt, and with a Lumicon diagonal and the same dual-sized eyepieces.

I'm glad yours clear, but I wouldn't take it for granted without measuring.

 

 

Jon

I measured a couple of Morpheus's at about 46 mm. One thing to keep in mind is that a filter can add another 8 mm or more.. 

 

Jon

[The Cloud Gazer]

When I wanted to use my hyperions as 2" eyepieces in the past, I added a little 2" extension tube to be safe with my diagonal.

In this case you need to have enough in focus travel for real 2" eyepieces or remove the extension tube for them.

[ABQJeff]

Used as a 2", the Morpheus 1.25" barrel will strike many prisms, and even comes close with many mirror diagonals.

It depends on the length of the eyepiece tube in the diagonal, of course.

Many years ago I encountered that problem with a 2" prism and Tele Vue 1.25" eyepieces with a 2" skirt, and with a Lumicon diagonal and the same dual-sized eyepieces.

I'm glad yours clear, but I wouldn't take it for granted without measuring.

For completeness, I checked my Ethos 13mm.  While it to is fine to use in my prism diagonals, if I add a 1.25" filter to the end, then it hits.  Fortunately, I use a filter wheel :-> (except for Night Vision)

[Migwan]

I do have my original Celestron brand 1.25" 'Star' Diagonal not sure how good it holds up to todays coating etc., it is as old as my Nexstar 8i XLT at 20+ years.

 

Maybe you can address the weight of Morpheus or Hyperion eyepieces? They will be pretty heffty compared to my current Plossi's. My biggest concern is whether the 1.25' Diagonal for a SCT is sturdy enough or is the 2" diagonals a better option with a 1.25" adapter and not stress the connections.

Thank You!

I used the 12.5 6.5 and 9 Morphs with  1.25" Celestron prism star diagonal for quite awhile before moving to a 2"diagonal.  I didn't experience any issues with  weight. 

[Majeskty]

I used the 12.5 6.5 and 9 Morphs with  1.25" Celestron prism star diagonal for quite awhile before moving to a 2"diagonal.  I didn't experience any issues with  weight. 

Good to know, Thanks for your input!