Hi all,
I'm a astrophotography rookie and I would like to use the Artesky 60 mkii with a canon camera. I'm not able to focus infinity targets. I think the telescope + the embedded focuser + the dsrl camera are not creating the right distance to have the focus on the camera sensor. Is there someone facing the same issue? which barlow lens do you recommend to solve the issue?
Thank you in advance.
Clear skies,
Michele
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It's a bit unclear what you are trying to do. Do you want to use the guide scope for imaging? That will probably not give you the most satisfactory results. It's not really correcting for any aberrations.
Either way, you need to set the right back focal distance. The T5 has 44mm as far as I recall.
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D. Jung:
It's a bit unclear what you are trying to do. Do you want to use the guide scope for imaging? That will probably not give you the most satisfactory results. It's not really correcting for any aberrations.
Either way, you need to set the right back focal distance. The T5 has 44mm as far as I recall.
Hi D. Jung, yes I would like to use the guide scope for not high quality photos (it is a spare part for me) and I know the quality will not be good. I have already try to set the right back focal distance but reaching the extremes of the focuser I cannot focus. Do I need a barlow lens?
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I guess the guides scope has a different back focus distance. If it's more than 44mm, you could use an extension tube, if it's shorter (which I think it is) you would need to get crafty and somehow get the right distance. If you have a 3d printer you could print a custom made adapter.
Not sure a barlow will help you here; it will just add even more aberrations, increase the focal length and increase the F number.
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The backfocus of that scope/guider is 35.5 mm, give or take half a mm. So, no, you can't use it with a standard Canon DSLR.
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Looking at the mechanical design of this guide scope, I think you can remove the helical focuser and 3d print your own adapter. Worst case you might even have to saw of some of the tube at the back to get the distance. This will be messy and focusing will not be fun 😬
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D. Jung:
Looking at the mechanical design of this guide scope, I think you can remove the helical focuser and 3d print your own adapter. Worst case you might even have to saw of some of the tube at the back to get the distance. This will be messy and focusing will not be fun 😬 Hi @D. Jung, the focuser is from 0mm to 14mm. if the back-focus is 35.5mm as reported by @andrea tasselli and the canon has "flange to focal plane" 44mm distance I don't think I will be able to solve the issue (without cutting the body of the telescope). therefore I was mentioning a barlow lens: to extend the back focus and then with a 3D print adapter to make an extension from the camera to the focuser. am I wrong?
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The 3D printing of the adapter isn't going to pan out. You'd need a T2 adapter for Canon which in itself adds quite a bit of extra spacing (around 11mm) so you better be sure that the barlow focus extraction is enough to cope with all the required backspacing.
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Also, you'll need a T2 to 1.25" adapter if the barlow hasn't got a T2 threaded flange.
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By all means, give it a try. I have 3d printed EF adapters, they are not pretty and you might get tilt but why not.
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@D. Jung@andrea tasselli please see the setup that is working. Artesky 60 mkii + 2x barlow lens + canon adapter 1.25"+ canon Rebel T5. I will try this night to take some raw pictures and see how well or bad is performing.  Clear skies, Michele
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