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Newbs2215

Explorer 130P and ZWO ASI 120MCS

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Hi All,

Just a quick question. The wife has a Skywatcher Explorer 130P. I tried to do a bit of simple Imaging with it using the ZWO Camera. I knew that you could not mount a DSLR onto it as there is not enough back focus. I was wondering if its the same with the ZWO, as all I could get were blurred images of the Secondary. I think I already know the answer, but maybe I am making a simple error.

Any help would be appreciated.

Graham

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39 minutes ago, Newbs2215 said:

Hi All,

Just a quick question. The wife has a Skywatcher Explorer 130P. I tried to do a bit of simple Imaging with it using the ZWO Camera. I knew that you could not mount a DSLR onto it as there is not enough back focus. I was wondering if its the same with the ZWO, as all I could get were blurred images of the Secondary. I think I already know the answer, but maybe I am making a simple error.

Any help would be appreciated.

Graham

Hi

I think you should be able to focus - I take it you connected the camera (without the supplied lens) using an adapter? However, trying to use that camera at the focal length of 130p means you'll only have a very small fov. That will make it difficult to get on target.

Louise

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Hi Graham

It’s not ideal but if you have a Barlow lens you could try attaching that first and then try adding the camera afterwards and you might get enough focus.

Good luck

Steve

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The backfocus on the 120 is 12.5mm.

The distance for whatever DSLR you have can be found here.

Most DSLRs seem to have a distance longer than 12.5mm, so achieving focus with the 120 may be possible.

As Steve suggests, a barlow may help with focus, but won't help with the camera's fov! Maybe an experiment for a night when the moon is around? - nice big target to hit and easy to see when focus is achieved.

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