I’m not certain if this extension is useful

[Mikel56]

Along with the Celestron 9.25 I also had a box of “extras”. The first attached photo shows one of the  units along with camera with 1.25” fitting at other end. I opened the unit and out popped a 32mm lens. The 32mm direct to the telescope produces a perfectly good image at about 80x. When I attach the unit with the lense fitted internally to the camera the image displayed on the camera has a narrower view and very close up. Focus is not too bad but not much use. Do I really need such a unit for taking photos ? Am I doing something wrong ?

[Albir phil]

Looks like a Barlow lens to me

[Cornelius Varley]

5 minutes ago, Albir phil said:

Looks like a Barlow lens to me

Not a Barlow lens.The adapter is for eyepiece projection photography. 

[Cornelius Varley]

How it was done pre digital.

https://www.csun.edu/~rprovin/ann/lunar.html

 

[Albir phil]

Sorry my mistake, I've never seen a projection unit.Always happy to learn 👍

[RT65CB-SWL]

Can still be done with digital too!

Below is an image from years ago of Montes Appeninus on the Moon. I used my EPU [inserted a 20mm Plossl e/p] using the top eyepiece port/holder of my ETX105, and an Olympus digital compact camera and CLA-1 adapter.

...before processing.

...after processing.

 

 

Edited September 3, 2023 by RT65CB-SWL

[Mikel56]

I’ll try tonight on the moon, thanks for that.

[Mikel56]

Tonight with the projection fully extended and 32mm eyepiece. My focus needs attention z!

Edited September 3, 2023 by Mikel56