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About skybadger

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    Riseley Berkshire
  1. When I was at school there was a local observatory with stepladder. This ladder was fixed open, moved on wheels and had steps that could be tilted back flush to form a seat at whatever height you needed. It was great for observing. Anyone seen one or know of any for sale ?
  2. skybadger

    Low rise skysurfer - how ?

    Hi all, I have a baader sky surfer V which has a high rise stalk for mounting on a scope using the normal dovetail shoe. However the manual talks about a method of mounting the tube direct to the dovetail to bring the tube closer in . I really can't fathom how this is supposed to work. I have a tube, a piccaninny rail clamp, the high-rise stand and a dovetail piece. Can anyone provide guidance ? Cheers Mike
  3. Thanks David Not sure I am looking for a simple answer but it all helps. The key issue I think I have, notwithstanding the fit of dovetails to each other, is the degree of mechanical droop for each weight at the end of a lever arm. What size of dovetail bar doe I need ? I think this is measured in thickness of the bar. Cheers Mike
  4. skybadger

    Turning a Vixen GP into a goto

    Or the onstep system or a instep board, or a little-foot... The steppers on the mt1 are up to the job, you need to put 18 or 24 volts across them with ballast and current control to get better speeds out of them. The Heq5 are the closest to a drop in. I did the goto4all MOD from etx motors onto an old Sx mount, followed by building an SS2K control onto a larger vintage mount. Working on assembling a instep for my horseshoe mount now.
  5. I am looking for advice on losmandy-style mounting bars and the sensible loading vs length to achieve a side-by-side mounting that doesn't show deflection under load. I have an existing side-by-side losmandy arrangement using Altair TMS parts to carry an 8" Cass at one end and a 5" refractor/80mm guider pair at the other end. This is on an EQ8 and uses a 300mm bar to separate the scopes, along with a FLO adjustment mount for co-alignment. The weight of each of the Cass is about 10Kg with filters and cameras and mounting gear and the other end maybe about 13Kg, that seems to work fine. I am moving to a 12" Cass that has a 16" tube and weighs about 13Kg all up. That means I need a longer central rail. I think I need one at least 15= 9" + 6" long or one slightly longer where I can move the guider down to between the other two. Is this too much for a central rail ? Is there a heavy-duty rail I can get for this sort of arrangement ? I am worried about deflection between the two ends of the side-by-side bar due to the weight. The EQ8 central dovetail is about 8" long so the middle is well supported and the cantilever distance will be about 5" at each end if balanced in mass.. Thoughts? Cheers
  6. It happens that all the t2 adapters are made that way, it's just a real faff in the dark to use them for rotation. Well done for finding some thumb screws that fit.
  7. I do this with the part provided by Nikon when I bought the camera. I'm sure there is one for yours. Have I noticed a difference ? Er, no. But I'd be surprised if I couldn't find one after looking.
  8. I'm interested. Shame about dogs though. What's the camping like in March, temperature wise and is everyone taking tents or caravans ? Cheers Mike
  9. skybadger

    Need help with Adapters

    Actually I'm surprised that you need an adapter, you seem to have everything you need for the prom filter and it should take a 1.25"e.p. directly. Unless it's 2" fittings you are short of.
  10. skybadger

    Need help with Adapters

    Compare it with this: https://astromart.com/classifieds/astromart-classifieds/solar-filters/show/eclissun-coronagraph-sale-pending KP82 Can you read the manufacturer ? I can't find one on the web from takahashi. Borg maybe ?
  11. skybadger

    Need help with Adapters

    Oh and baader also do a 68/60/56 mm eyepiece clamp that would fit so with the adapter you mention you should be good to go. You can also find them at telescope express. MIKE
  12. skybadger

    Need help with Adapters

    That's a coronograph, used to occult the body of the sun so you can see the much fainter prominences around the edges. I've only seen antique scopes built to have the occulting disk (that filter thing) further up the tube. The prominence on the picture gives it away. You might find that scope is built specially for that purpose alone. Also, normally there are multiple different sizes of occulting disk to take into account the different apparent size of the sun during different seasons. Do you have them ?. I'd buy that from you if you're not going to use it. First time I've seen one. The other widget with screws on is a reticle projection unit used for guiding. Does that help ? Mike
  13. You shouldn't have to do that... the disabling that setting, I'm sure I didn't when I was tinkering last. I do a lot of tinkering.. bit it's sorted now.
  14. skybadger

    Imaging and mount control options

    Looking at the comparative link above I think the comparison is out of date or not clear enough what is being compared in places. .. I think MAxim is under-represented in some key areas for example. But then I still have to have a good look at PRISM..
  15. skybadger

    Imaging and mount control options

    Thanks Martiin, good catch - I have seen PRISM before but it would be good to get your opinion in actual use ? I'll add it to the list. Cheers

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