matija
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Everything posted by matija
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its a 485 which is a planetary camera but im 48.5mm off
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Hi Steve. Im focusing by using live view in sharpcap at 200ms and mid to high gain. I rotate the knob manually.
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The image is uncropped. I am missing 48.5mm of backfocus tho. That sounds like a big deal to me?I do use a lum filter. The baader 1.25".
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Thank you very much. I suppose missing those 48.5mm really messed up my images. Ill try gain with the extension tube, when it clears up.
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Its cold where I am and the scope was out for 4 hours before imaging. one more thing, with my scope and camera configuration I need 54mm between the focuser plane and the camera body. When Imaging this image I had 0. But the thing is, that I was still able to undershoot and overshoot the focus, meaning, I turn the focus knob, the focus keeps getting better until a certain point and then its starts going in the other direction. I technically can focus, its just that the focus that I get is soft/blurry. Could the missing space between the focuser plane and the camera be causing such a phenomena? Thanks!
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@StevieDvd I did not have a diagonal. also, with my scope and camera (like you said) configuration I need 54mm between the focuser plane and the camera body. When Imaging this image I had 0. But the thing is, that I was still able to undershoot and overshoot the focus, meaning, I turn the focus knob, the focus keeps getting better until a certain point and then its starts going in the other direction. I technically can focus, its just that the focus that I get is soft/blurry. Could the missing space between the focuser plane and the camera be causing such a phenomena? Thanks!
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For this image I didn't have any ccs or reducers. I was able to get what looked like perfect focus with an eyepiece (sky panorama 23mm 82deg) after adding the included extension tube. So does that mean, that my sensor has to be 37.5mm away from the end of the focuser or..? I don't see how adding even more space between the cam and scope would make it easier to focus, considering, I can already overshoot and undershoot focus without any tubes. Thanks! Matija
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But I cant get any better of a focus. Is there something else I can try? Matija
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How can I check that?
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@ONIKKINEN I am using a cmos camera and as such it doesn't have hardware bin so binning wouldn't help at all. Here is an image.
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Hello. I own a 250pds (1200fl (f4.7)) and an Asi 485mc (2.9um pixels) and for some reason I cant get it to focus. I am collimated with a laser and the atmosphere was not too bad. I also have enough room with the focuser to move it past proper focus and far out. Though I still cant get the image to look sharp. I get that I am a little oversampled but the stars are huge and the object is fuzzy. The scope was also properly thermally acclimated so I really can’t think of anything that could be causing this. Thanks!
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@jacko61 exactly. I didnt just sped 5k to have my worm scrape. I contacted SW support just now.
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Hello. I just got a new EQ8R pro from skywatcher and I noticed, that the RA axis scrapes a little bit when slewing east. It seems to stop/get better if I slightly push the mount in certain directions. Any ideas?
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@stuyUnfortunately Andreads passed away recently
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Hello. I just bought the Gemini G42 observatory+ used with the PULSAR 2 controller, but I really can't seem to be able to use it properly. After I polar align the mount and initialize it on a star(in my case Rigel), I send it off to do its job, but it misses targets by 1deg per 20deg slew. Should I add more alignment stars? How do I do that? I'm really wondering just how to add more alignment stars to the controller (what buttons to press and what values to enter). I could also use some information on PEC. How do I make the model? Thanks in advance! Matija
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@tomato Is 2mm diameter for the pin really enough? The mount will drive a 15kg scope max.And how thick do you think the disks have to be? 10mm? 5mm? Im seriously considering that design. Thanks for your response, it was very helpful indeed.
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@tomato does the motor axis pin need to be tentioned with another roller like a bearing with a screw & spring ot can I just tention the pin itself?
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Thanks for oyur response. Is a 1mm roller wide enough? It seems a little thin. And yes. Servos have encoders to tell them its posotion. I spoke with the owner of Sidereal Technology and he said that his servos should work just fine. He did warn me about slipping though. What do you know about slipping on friction drives? Thanks!
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Hi. Im making a homemade german EQ mount that will use SiTech servos. I already have the design for a worm drive system but to get rid of errors and backlash I want to transform it into a friction drive mount. I don’t have much information on how to make such a thing. What material do you use for the disk? How large should It be? And most importantly how to actually spin the disk(friction roller and so on, should it be touching the disk on the edge or on the face side?…) If you have any sketches, ideas, photos, information, please do tell. Ill attach images of the mount desigh. Thanks!
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I want to image M51 with my manual 8" Dobsonian and a sony a6000 from bottle 5. Now Im just wondering if it's even worth trying. I imaged ring nebula and the result was amazing at 700x0,4s. Would I be able to resolve detail at 2000x0.4s?
