powermate on Lunt50THa

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Taipan
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powermate on Lunt50THa

Post by Taipan »

Is there anyone who has succeded to put a 2,5X powermate on the little Lunt50? If so, can you give me some tips on where in the imagetrain i should put it? And distance from blockfilter and to camera to achive fokus...
I allredy got the powermate so i thought i should try this out before i bye a bigger scope or a Daystar Quark for my Esprit 80...
The 50 works great for full disk pictures byt want to do some closeups...


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Re: powermate on Lunt50THa

Post by JochenM »

It's perfectly possible, yes. You place the powermate between the blocking filter and the camera.

I had to unscrew the actual powermate from the extension tube and screw on the camera directly in order to be able to reach focus. Televue has an adapter that basically screws right on and provides a T2 thread on the other end.

I've attached a few pictures to clarify what I mean exactly. Hope this helps.
Powermate.jpg
Powermate.jpg (2.58 MiB) Viewed 1306 times
LS50.jpg
LS50.jpg (1.68 MiB) Viewed 1306 times


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Re: powermate on Lunt50THa

Post by Taipan »

Ok. Didn't thing it should be possible to reach fokus with that setup. But then i will try :)
Do you not got problems with newtonrings either??


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Re: powermate on Lunt50THa

Post by JochenM »

No issues with newton rings here.


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Ivan
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Re: powermate on Lunt50THa

Post by Ivan »

JochenM wrote: Sun Jun 13, 2021 3:36 pm No issues with newton rings here.
Jochen hello,
What focuser is installed on your Lunt50?

Ivan


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Re: powermate on Lunt50THa

Post by JochenM »

Ivan wrote: Fri Jun 25, 2021 9:23 pm
Jochen hello,
What focuser is installed on your Lunt50?

Ivan
Hey Ivan.

It's a MoonLite CM-mini (specifically meant to go on an LS50).


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Re: powermate on Lunt50THa

Post by Ivan »

Thanks Jochen, It looks like a small piece of art.

Ivan


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Re: powermate on Lunt50THa

Post by Goose »

Hello:
I have been using a Lunt 50 double stacked and an ASI174mm camera, all without any problems with regard to full disk imaging. I'm trying to get closer using the Powermate with the Televue adapter as Jochen has described but don't seem to be able to get to focus with it. Is there something obviously wrong with my image train? Thanks for any help.



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Re: powermate on Lunt50THa

Post by marktownley »

Goose wrote: Sun Mar 24, 2024 10:10 pm Hello:
I have been using a Lunt 50 double stacked and an ASI174mm camera, all without any problems with regard to full disk imaging. I'm trying to get closer using the Powermate with the Televue adapter as Jochen has described but don't seem to be able to get to focus with it. Is there something obviously wrong with my image train? Thanks for any help.



Jim S
Hi Jim,

A warm welcome to the forum. Do you not have enough back focus with the setup?

Mark


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Re: powermate on Lunt50THa

Post by davidem27 »

Welcome onboard Goose!
I can reach focus with my ASI178 in this situation:
backfocusPWM.jpeg
backfocusPWM.jpeg (134.81 KiB) Viewed 143 times
My camera has 12.5mm backfocus to the sensor. Your camera got 5mm more, so you have to get inside 5mm more than my configuration.
It seems you have to put the diagonal BF into your focuser.

Hope you succeed


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Re: powermate on Lunt50THa

Post by Goose »

Thanks for the advice. It seems like I'll have to go with a 12.5 backfocus to get this to work.


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Re: powermate on Lunt50THa

Post by marktownley »

Can't you push the diagonal further into the focuser?


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Re: powermate on Lunt50THa

Post by davidem27 »

If you can't push the diagonal into it, we can switch the focusers :mrgreen:


White light: Skywatcher 120 ED and Borg 76 ED with Baader Herschel Wedge and filters
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Re: powermate on Lunt50THa

Post by Goose »

I can get the diagonal a bit further into the focuser, which I will definitely try out. That is as soon as the sun comes back out again, which wont be until next weekend. Thank you all for your help and advice.


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