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Showing results for tags 'focus'.
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Last night started off so clear (an unexpected according to CO) so managed to drag the rig out onto the patio. Nebula targets that are above houses and trees are few and far between at moment for me but ad a go at Horsehead initially then Heart. But I was not happy with the images I was getting and a close look showed the focus was not precise, in fact far from it. So using the auto focuser in EKOS I tried tuning it in. But each time I tried it failed. I did look on line for suggested parameters and that was not too useful as there were suggestions to use just about every com -
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. -
Hello, 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 -
I’ve just acquired the above (birthday prezzie!). It’s a nice finder, and a definite boost from the 7x30 bundled with the scope! However, I’m struggling to get anywhere near focus with my Pentax K50 on the end of it... anyone know why? There’s no focus mechanism to speak of, other than the objective lens’ mounting thread... -
Hi everyone! As I said few days ago in my presentation I recently got my first scope (skywatcher 127) and over the last days I tried to test It. Due to impossibility (temporary) to bring the scope in a decent location to make observations, I had to test it from home through a window (and under the sky of London - not the best at all). So i know that quality is of course affected. On the other hand, I am sure that the performances are worse than I could expect also under these conditions (maybe you will correct me) and would asks for opinions to improve. As a (mainly) plan -
I spent the full night out last night and got 6 hours of Ha lights on the Bubble and the Horsehead. Reasonably pleased with the results, but even though I followed my usual process and got good focus statistics in APT, I am slightly out of focus with roundy stars and some are even slightly donutty. Samples are attached below. Problem: - After getting close to spot-on focus, the APT Bahtinov Aid showed a focus distance oscillating from -0.02 to +0.02. Seeing seemed good to the inexpert eye. Not so sure about transparency as there was some thin, wispy cloud throughout the night. So, I sta
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I acquired a second hand Coronado PST. The focus knob doesn't seem to have any effect on the image and, although it turns, it feels as if something inside the scope is "slipping". Is it worth opening up and taking a look to see the focus knob in action? Is there anywhere that services the PST without sending it outside the UK? Are there any nasty surprises if I open it up (springs, pressure points etc)?
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Two questions if I may. 1. Can the three screws marked by yellow arrows in the picture below be used to mount a second finder shoe on the C11 EDGE HD scope, permitting both a straight through and a right angle finder to be fitted? 2. The EDGE has field flattening optics inside; is the distance from the visual back to the chip critical, or by making adjustments to the position of the mirror to achieve focus on a chip say 250mm away from the visual back mean the field will still be flat at that distance? Thanks. James
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hi..i have star discovery 150p scope with rockandpinion focuser... low magnitude is ok, but with greater magnitude (8mm eyepiece) i just cant get nice focus...stars canr be dots... i colimated it perfectly with lasercolimator
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Hi all. after receiving my scope yesterday I went outside for about half an hour with it and was quite impressed on how easy everything is to set up and use. However I have two questions that I would like answered. When viewing at the moon using my 25mm eyepiece I could see a blue and orange haze around the left and right side of the moon. Was this because I didn’t have eyepeice focused probably or is there another reason? And also while focusing I had a lot of vibration is there a way to reduce it. Today I tried to get my red dot focused aligned with my telescope and I think I
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Hi I have a Skywatcher 200PDS. I managed to get images of saturn, jupiter with the telescope and the ASI120MC-S camera. However, to get a bit more magnified image of these planets I got myself a Barlow Tele Vue 3x and Revelation 5x. I am having trouble with this setup and really disappointed now. I am not able to achieve focus with any of these barlows using my planetary camera. I have added extension etc. but no luck whatsover. I just see a blank black video preview in SharpCap. I have seen people using the same setup and getting good images out of those. Any help highly appreciated. -
So my birthday just past so money to splash on astro stuff , i will have my 1000D modded by juan at cheapastrophotography and also have ordered an autofocuser from deepsky dad https://deepskydad.com/autofocuser i know they can be done DIY but this is a neat package and costs about the same as a SW autofocuser and a hitechastro focusmaster and i`m no electronic wizard and pavel seems to have a good product and works with ascom and confirmed it works with APT i will update in a few weeks time when hopefully i will have received and tried out .
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I came across a video on youtube of a flymesh bahtinov , not focal length dependant has anyone ever tried this method before ? mesh he used is approx 1.5 mm sq and one half of the mesh is at 45deg to the other half ,found after i purchased a mask for my mak but still need one for my 130pds . https://youtu.be/IeUs7pFwMJw
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Hey ? I took delivery of a Skywatcher 200p last night and got it set up ok I think. I got a good view of Jupiter with the 25mm lens but when I put the Barlow lens in I couldn't focus it. I also tried the 10mm lens but it made everything grey, no real light comes in at all. It came with a thing that might be called a focuser extension, not sure, but it didn't help. What rookie mistakes am I making? -
I'm brand new to this site, but I'm having an issue with my Celestron Powerseeker 127eq telescope. It's brand new right out of the box today. I have another telescope, Zhummel Z10, but the celestron just won't focus. It gets so close to focusing and just needs a little more. Any my help is appreciated thank! -
Hi All, I'm very very new to this - so be gentle with me! I've inherited a Helios 150 telescope which I'm learning how to work. I observed the Moon through this a few years back, and it was brilliant, and I'm keen to share the sight with my children. The problem is I can't seem to focus the view finder. I can find the Moon of the spotter scope, very clearly, but when I look through the main eyepiece - a PLOSSL 10mm - I can see the light of the Moon in the back ground , but can only seem to focus on tree branches that are in the foreground- very clear relief - in the foreground. -
Hi All, New challenge I am running into. When I add a filter wheel on my Bresser AR102s I run out of travel when trying to focus in. I have removed all the extensions and still can't focus in. Am I out of luck or is there something I can do? I am reading up on Focal Extenders am I heading down the right path? Thanks for your help. -
I am using a Baader Hyperion 36 mm 72° eyepiece with the Starwave 152mm Refractor and cannot get focus unless I use extensions for visual - for imaging it is imposible. Any Ideas ? Ernest Ernest
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Hello, Am very new to this so apologies right from the start. I have recently just bought a skywatcher akyliner dobsonian 200p and i set it up. However the image is very blurry even when i remove all magnification and just look into the primary mirror eveything looks very blurry including the moon or nearby trees etc. I am unsure what the issue could be as i am eager to get started on my stargazing! Could someone please assist me or at the very least point me in the right direction. Kind regards -
Hi SGL Wizards, I'm using an ED-80 with HitecAstro DC Focus, and am controlling it via SGP Pro. I've got autofocus working well (hooray!) but notice that each night the Focus Control's Current Position number gets larger and larger. For example, a month or so ago it was around 9000 for focussed stars with a H-a filter. Tonight it's 12884. Is this normal? I'd expect the number to be absolute, i.e. always around the same number but with some slight variations given temperature and the like. Thanks in advance, - Lee -
Hi I’ve recently got some shiny new kit, and last night was the first clear skies here when I had the opportunity to try it all out. This is not my first time observing, so I’m well prepared for unexpected issues, but it is my first time ccd imaging. There was lots of learning, including; cable management needs to be better, I (still) never have the right USB cable, and the focus tube needs some mechanical refining to address slippage. But the problem I’m not sure how to solve is one of focus. I bought the SW Trius 814 kit (Trius 814, mini usb filter wheel with OAG, and Lodestar X
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Good night, I have a Shoestring Astronomy automatic focuser. But it does not memorize the absolute position... Will it be necessary to add encoders in order to use it on a full robotic setup? I'll use SGP. Thanks so much, Aleix
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I have been researching Radio-Astronomy and have not been able to determine information on antenna directionality. Do RT mounts require axis motors to keep the object in it's focus area? What are the resolution ranges and factors that determine the discrimination of say one star from another which have very small degrees of separation?
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I recently acquired a Meade Lightbridge 16" scope (f 4.5), and realized that I'm unable to focus with my barlow attached ( the barlow is a Celestron X-Cel LX 3x barlow). After some experimentation, I found that it's because the focal plane of the primary is too short - it's just at the end of the focuser when it's fully retracted. By removing the 2"-1.25" adapter, I found that I'm able to focus with the barlow if it can go about 6 mm further in. Other than cutting my truss tubes to shorten them, or buying a lower profile focuser, is there any cheap, DIY method by which I can achieve focu -
Hey guys I'm new to telescopes and well I have tried reading up on possible fixes, nothing works. First day I used it I was able to get a clear image on the lowest power inserting a 20mm eye piece and it would focus. Attempted my first night to look at Mars. Well it was a big blur and nothing worked. Next day I was attempting to look at a mountain and no matter what I did or try it remained blurry. Focus dial is free moving but the image stay as a massive blur. With no eyepiece it's still all a blur. If I look through it backwards there is a clear image however looking from t
