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About SiriusB

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  1. wood expands & contracts with moisture content~ you'll be forever polar aligning. An Ali, steel, or masonary pier would be more practical. Victorians used cast iron~ nice damping qualities.
  2. https://www.cloudynights.com/topic/465378-circle-t-towa-or-tany/ Loooks like Tani made eyepieces.~ see sketch in thread. AH= achromatic huygenian i think? I have corresponding 1.25" circle T Kellners,which i like. You shouldn't lose any AFOV in the 12mm & 20mm & (maybe even 25mm?) in the smaller format compared to 1.25" versions. They look a nice set,~great for a classic refractor. I've not seen volcano tops in .965" format, usually it's a (i don't have a name for the usual type of top in japanese .965")
  3. If it's an owl to you Pixies, who am i to argue . But you've drawn ET in a cape!
  4. I was going to say the ET cluster NGC457, but i see it's already been mentioned..... as a Owl ? ? All i can see is ET You'll have to check it out now O.S. ~ just to see what your brain interprets the pattern as.
  5. ....or at least it can be. Just wanted to share a article i stumbled across, that i particularly liked.(hope that's ok mods?) https://cosmicpursuits.com/2358/an-ode-to-small-telescopes/ Highlight for me was the image & write up of the 40mm Unitron. Takeout from the article was whatever your budget, enthusiasm goes a long,long way. Enjoy the universe with what you've got. I started out in 1982 with a rather dubious 50mm refractor on a' blancmange mount'. Really it should have put me off for life, thankfully the youthfull enthusiasm held out. Also thankfully~
  6. There you go, alas as it's an very old post the pictures seem no longer with us.
  7. That about sums it up Stu. Sirius is dancing & you may have good transparency but poor seeing. an Autumn light mist & you may have excellent seeing but poor transparency. Very rare in UK to get both. I do remember one memorable night when i had both, 250x mag(scope limit) & Saturn was without a shimmer, but also, dso's were like i had a larger aperture in play. I stopped out very,very late, in fact till dawn light started to intrude. I never wanted that night to end.
  8. You're welcome. My advice would be to solve the issue one way or another though.
  9. Brighter dso's? Interesting to discover what you can still see under full moonlight,they will be somewhat washed out, but you'll learn something. A few years ago with same or less aperture than yourself i tracked m33 through the moons cycles, it was still visible with a 10day old moon, whether i suceeded @ full moon i don't now recall, but i'm quite prepared to try for dso's a little past half moon even now.
  10. ....or if you can take the barrel off & take a picture of both ends maybe some kind soul will take pity & find a replacement in their parts bin. If it's got female filter thread both ends, that's easiest to find a replacement.
  11. Some Variation in ep barrel size & focusser/diagonal bore seems fairly common, least @ the lower end of the market. By way of reference i have an old vixen barlow,(actually an extension tube now as i can't seem to find the lens element!) Putting a circle T ep into this there's an air cushion effect~ both neither too big or too small. I'd offer to machine the barrel down to size for you for free, but with the postage both ways, you'd probably find it cheaper to locate a replacement barrel. But the offers there. Take the barrel off to see what fitment it is &
  12. Sounds like backlash somewhere in the system. First thing i would try is loosen the grub screw & see if the knob will push a little further onto the shaft? It's a long time since i took mine apart,so i forget the exact workings, but somewhere on this site there was an excellent stripdown guide.(hopefully that won't be required) I find my focuser works very well, though i supplement it with a helical focusser for fine tuning @ high power.
  13. No, no markings as to the origin anywhere.... but very minor points. I'm quite sure FLO would have swapped if i'd asked them on receipt, but it really wasn't a biggie for me, for £20. Can't expect perfection for £20, when others are still chasing it it @ 20x the price.
  14. Thankyou Peter, I'll try the rotation method. When you say "....are an indication of tilt,usually" do you mean of the objective as a whole, or of the elements relative to each other? Thanks.
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