Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

sgl_2018_sp_banner.thumb.jpg.a4fa178de7d36660e48f7eb1205319eb.jpg

Cosmic Geoff

Advanced Members
  • Content count

    801
  • Joined

  • Last visited

Community Reputation

428 Excellent

About Cosmic Geoff

  • Rank
    Proto Star

Profile Information

  • Location
    Bucks, United Kingdom
  1. Cosmic Geoff

    WiFi mounts.

    Feel free to experiment, but the reality of using a USB video camera on a telescope (remote controlled or otherwise) to transmit images to a remote screen falls rather short of what you are imagining. For instance, with my Mak and SCT the camera field is so small that it shows only a small fraction of the Moon, and using remote controls to get it aimed at anything other than the Moon would be very difficult. (it's hard enough when one is standing by the telescope with the use of its finderscope).
  2. Cosmic Geoff

    Celeston Starsense

    The Sky-watcher version used to have an extra box and cost about £100 extra, which implies that the Sky-watcher and Celestron versions are incompatible. But ask the supplier.
  3. The focuser knob should rotate easily, and there should be no need to take off its end cap. I was going to suggest that the best way to check the focuser mechanism or get the telescope in focus is to point it at a bright object on a dark background (Arcturus or Venus would be ideal). Typically what you will see is a bright circle with a dark hole at the centre (like a doughnut or CD). Turn the knob in the direction that makes the doughnut smaller. If the knob will not turn when held with thumb tip and finger tip, or it won't focus as outlined above, then you need professional help. If you are not familiar with telescope servicing you will not be able to fix it yourself.
  4. Cosmic Geoff

    Help ! Image too bright through camera

    If you are using Sharpcap with a compatible USB camera, use the histogram function in Sharpcap to set the exposure. When it's about right, the three coloured lines at the bottom should be bouncing rear the right side. Don't ask us what exposure to use, select it by the histogram. I have seen the best exposure time vary with the atmospheric conditions. I am using a f10 SCT for Jupiter, so you want at least a x2 barlow. Another tip - focus on one of the moons, or better, on a star (you will probably have to adjust the exposure).
  5. For looking at planets with this telescope you will not need to spend $$ on exotic eyepieces, just some of a suitable focal length. The long focal ratio will make the telescope even more tolerant than my f10 SCT, and I found that a modestly priced 15mm Celestron Omni Plossl eyepiece worked well enough. But it's your money. This particular Mak-Cas is, I understand, primarily intended for planetary viewing and imaging.
  6. Cosmic Geoff

    SynScan controller for intelliscope?

    I'd be amazed if it uses a computer-type interface. Computer ports are not anything like something that would interface with a pair of encoders. If you could plug in any laptop and direct the scope, that would rather reduce the market for £250 controllers, would it not? Manufacturers will always use proprietary hardware unless forced to do otherwise.
  7. Cosmic Geoff

    SynScan controller for intelliscope?

    The intelliscope controller presumably counts pulses from a pair of encoders, while the Synscan controller presumably counts pulses from two encoders of a different design and issues commands to the motors. The Synscan handset will probably check for the presence of a Synscan mount, and give an error if it doesn't find one. Given the differences, I'll be gobsmacked if you manage to rewire the Synscan controller to work with the Intelliscope. They are totally different systems. I suggest you shop for a used controller, or see if it's economic to sell on the faulty kit and buy another that works.
  8. Cosmic Geoff

    Not getting enough light into new ZWO

    The ASI120MC is intended as a planetary video camera. The results you describe are absolutely what I would expect if you couple it to a f10 SCT and try to photograph stars. Others more knowledgeable will no doubt advise you on your next move.
  9. Depends what sort of astrophotography you want to do. I have successfully imaged planets with my C8 SE. Also I have taken stills of some bright planetary nebulae. As for long exposure astrophotography, I don't think the mount is suitable for this.
  10. Cosmic Geoff

    Skywatcher 127 matsukov

    That's up to you, but I still use my 127mm Mak quite often - see other gear in my signature.
  11. Cosmic Geoff

    what am I doing

    I acquired a 200p Newtonian reflector to put on my EQ-5 mount (roughly comparable to the Exos-2 as far as I know). I soon found that the eyepiece got into some very awkward positions and it was almost impossible to aim the setup near the zenith with the straight-through finder, and while the instrument was suitable for looking at faint deep-sky objects, without GoTo it was almost impossible to find any. I soon bought a Celestron C8 SE with GoTo, which was an all-round improvement in weight, size, convenience, performance and usability. (And several times the price of a 200p Dobsonian setup). BTW, if one wants a GoTo that aligns itself, then one wants the Celestron Starsense accessory. Not cheap, not essential, but avoids the fag of manually aiming the mount at alignment stars. Once set up, I found I had to do little more than carry the complete tripod/mount/OTA/ Starsense assembly outside, set it down and turn it on.
  12. Cosmic Geoff

    Celestron NexStar Se 8

    The C8 SE is meant to be used as a GoTo. It is not intended to be used manually (you can not push it horizontally and the ability to push it in azimuth is of no practical use.). If you want a manual option you should buy something else. Personally I have never seen the point of moving the scope manually if GoTo is available. It's much less bother to press 'Saturn' or 'M031' if it's aimed at Jupiter and you want to move it than to reposition the scope manually. Why fiddle with the finder etc when you can just press a couple of buttons? The C8 SE is an excellent scope for visual use and you can use it for planetary astrophotography. The mount is not the most rigid around - on the other hand the whole outfit is relatively portable - I can carry the complete assembly through a doorway and out of doors, and it breaks down into a couple of packing boxes for taking it on holiday.
  13. I have found that with planetary cameras, unless the image of a planet is almost in focus, you can't see anything at all. I had some trouble till I worked out ways of pre-focusing the system so that the camera would be near focus when I dropped it in. (I focus my Mak and SCT with the eyepiece held about 6mm out of its normal position, then drop in the camera.) It is also possible that with the Barlow in place, your system is not capable of reaching focus - something you can most readily test on the edge of the Moon or a distant terrestrial target.
  14. I own a 5" Mak and also 8" telescopes. I'd say that the 9.25" will offer a useful gain when looking at planets - my 8"SCT is always better than the 5" Mak when conditions are fair to good. Also consider getting an ADC for looking at low-altitude planets. My 8" Newtonian is not so impressive but that's a sample of 1. I should point out that I have found that a good planetary video camera records views significantly better than what I can usually see directly with the same telescope. I have found planetary visual observing to be something of a disappointment. For deep-space objects, a larger telescope of 8" or 9.25" aperture (it doesn't have to be a SCT) will provide a striking improvement in the view. I would advise that you be sure to get one with GoTo, otherwise what you will mainly experience is frustration at being unable to find any faint object.
  15. Cosmic Geoff

    Alternate mount for 8 SE

    The 8SE mount could be steadier, but for visual I have found it adequate (in a sheltered location). It is steadier with the tripod legs fully retracted. Scopes do tend to wobble when focusing - it is best to get the focus right and then leave it alone. However if you find the vibration particularly annoying, you can put it on a more rigid mount - it's your money. Be aware that the equatorial AVX will be more of a bother to set up than the alt-azimuth SE. A word of warning - the edition of the Celestron 8"SCT supplied with the 8SE mount is meant to be left attached to the mount at all times and has no grab handles. It is awkward to detach and re-attach the OTA, hence I only ever separate the mount and OTA with the mount stood directly on a carpet (for travel). If you put the OTA on another mount, and have to attach and detach it every night in the dark, there is a risk that sooner or later you will fumble it and drop the OTA 4ft onto concrete and write it off.
×

Important Information

By using this site, you agree to our Terms of Use.