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Hi, I've got a Skywatcher Heritage 130p reflector, and if i insert anything less than 10mm eyepiece, the image won't get crisp. I guess it's normal, but as I'm very new to astronomy, I'd like to know what the sharpness depends on exactly.
Is that the focal length (how fast the telescope is? ) or the size of the mirror and how much light it gathers? Or both affect it the same way?
Are things the same with refractors in this regard? Thanks.
So I've finally gotten round to setting up APT and Sterallium (via ASCOM) on my laptop for controlling my mount EQM 35 pro. (I got PHD2 working on it a while back). I followed a tutorial on youtbe about doing this using simulators in Sterallium, when doing this pressing control + 1 on the keyboard moves the simulated telescope and everything seems to update in ATP and work fine.
The (small) problem I'm having is when i successful connect my own mount in Sterallium (after doing the same in APT) I click on an area and then press the short cut Ctrl + 1, nothing happens, my yellow telescope icon doesn't move to the location, but when I do it in APT, sterallium obviously updates to show the new position.
Any idea why the short cut in Sterallium isn't working when connected to my mount?
I'm getting desperate over this hobby (but I refuse to give up); with every change new problems set in. I purchased a SVBONY SV106 (60mm - 240mm) guide scope to replace a 80mm - 400mm scope, I was using as a guide scope which was installed on the Orion 8 tube rings. I replaced the finder scope with the guide scope.
First issue balancing but that one I sorted out. Then I tried to focus the ASI120MM with the new guide scope. For the old one (80x400) , I needed 2 extensions (in fact the extensions are low cost barlows from which I removed the plastic lens) to get focus. To align the new guide scope, I used a 17mm eyepiece and that went ok while pointing at some far away trees. But I could not get the ASI120MM focused on the same trees, not with PHD2 nor with Firecapture; I turned the gain way down, but with or without extensions, no focus. As bad weather is (again) setting in and the scope is permanently outside I had to stop trying.
So I take on this break to get some assistance. Anybody any advice on this, for
I am pretty new to this forum. Well, have been following it for quite a while but this is the first time I am writing something.
I am selling my ASI 1600MM Pro that I bought from FLO on February 2020. It has been a great camera, and even with my Celestron NexStar 8SE scope and Bortle Class 8, it gave me great results. It doesn't have any mechanical or other problem, the reason I am selling this is to move to a new camera
Let me know if you are interested in.
The price I have in my mind is £1000.
Here are some pictures I took with this camera ;
For what has seemed like forever, the clouds finally parted late last night and the Orion constellation was very clear from my balcony.
I had a brief window of opportunity earlier this week and had difficulty focusing on stars at all using my DSLR (Canon 450D) and APT.
Last night was a breakthrough; I was able to capture starlight in APT liveview and even bring the stars into (significantly better) focus!
I now face my next challenge; I am unable to focus sharply on any of the stars. Using my telescopes focusing wheel I seem to get only blurry spots of light coming through, despite very carefully adjusting the wheel for quite some time.
At the risk of embarrassing myself, I've attached the images of Rigel and Betelgeuse I captured last night (on both long and short exposures, details of ISO and exposure are detailed in the image titles). This is as sharp as I can them.
Is there anyway I can fine tune the focus? I've seen AP videos on Youtube where jam jar lids have been glued to the focus wheel or motorized focusers attached. Are these gimmicky or do they make a significant difference?
I should mention that I don't yet have a tracking mount: I've eyed the Skywatcher AZ-GTI wi-fi as good candidate for my first meaningful mount (with the EQ wedge coming shortly after). Having emailed a number of retailers it seems these are in very short supply, here's hoping stock replenishes post-Christmas! I think this will let me get to grips with the equipment I have right now, definitely would like to get a sharper image, even if I'm only capturing star trails.
to capture the images shown below I used:
- Celestron 100AZ (100mm Aperture, 660mm focal length)
- Canon 450d
- Barlow lens x2 (Celestron)
- APT (connected DSLR directly to laptop via USB)
- Stock Celestron Alt-Az Mount
All the best.
Single__0049_ISO400_0s4s__20C.CR2 Single__0034_ISO1600_30s__20C.CR2 Single__0027_ISO1600_30s__20C.CR2 Single__0012_ISO1600_1s__20C.CR2 Single__0011_ISO1600_30s__20C.CR2