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johninderby

Beyond the Event Horizon
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Everything posted by johninderby

  1. Can you imagine the eyestrain, headaches etc. caused by using binoviewers with zooms set at different focal lengths. 😵‍
  2. So you can set both zooms to exactly the same setting. Without the clickstops would be hard to have both zooms set the same or you would have to fiddle around to try and get them the same.
  3. Was that the old flat top Nirvana or the newer one with the conventional rubber eyecup? Not had any blackout problems with my 16mm Nirvana.
  4. Reminds me of the old joke about guitar players. They spend half their time playing out of tune and the other half tuning. 😁 That’s the greatest weakness of the SCT design at least in the medium and bigger apertures. Keeping one in perfect collimation all the time is the problem.
  5. BTW will the APM wonder zoom every be released? Allways seems to get delayed.
  6. You just have to accept that every scope is a compromise and no one scope does ot all so it’s more about finding the best comprimise rather than the perfect scope. Also explains why most have more than one scope. 😁
  7. I found the Hyperflex zoom to be about 80% to 90% as good as the Baader zoom. The Svbony zooms are also very good. The Nirvanas are a best buy. Not as good as a Nagler but not that far off either. Would rather have the set of Nirvanas than the Baader zoom.
  8. That would indicate a problem with the focuser not being squarely mounted.. The wooden part the focuser is mounted to may be slightly out.So perhaps a bit of shimming is called for.
  9. An article by Damien Peach that might be of interest. An examination of the effects of optical aberrations, obstruction and seeing on real Planetary images. http://www.damianpeach.com/simulation.htm Used an area calculator and came up with the same answer of 15,029
  10. I did ask Steve about a 10” solid tube CC. With the carbon tube wouldn’t be much heavier than the 8”. He said it would be possible if there was enough demand. 🤔
  11. The Svbony 1.25” diagonal is pretty good despote it’s bargain price. https://www.amazon.co.uk/Diagonal-Adapter-Refracting-Telescope-Eyepiece/dp/B07GPMX7BN The StellaMira diagonal is a bit better. https://www.firstlightoptics.com/diagonals/stellamira-1-25-90-di-electric-diagonal.html And better still. https://www.firstlightoptics.com/diagonals/william-optics-125-dura-bright-dielectric-diagonal.html Or if you would prefer a prism. https://www.rothervalleyoptics.co.uk/baader-prism-diagonal-t-2-90-with-focusing-eyepiece-holder-and-125-nosepiece.html
  12. Yes find the CC edges out the mak and SCT in on axis sharpness. The optics in the CC seem to be better finished. Will take higher mag as well.
  13. And that’s the reason I went from the C8 to the CC8” . So sharp on axis.
  14. One other thing to note with the CC design is that it has a fixed primary so no mirror flop.
  15. As much as I love my CC8” can’t help wonder what the CC10” would be like. 🤔
  16. Yes collimation is still perfect. 👍🏻 Would be intesting to compare the Mewlon 180 with the Tecnosky 125. 🤔
  17. #12 piano wire is 0.7mm and comes in a 1m length. Strong stiff and doesn’t kink like copper. Violin E string is 0.54mm You don’t want to go too fine otherwise the crosshairs can be hard to see.
  18. The Skymax127 AZ-GTi is very popular and just over £500.00. The AZ-GTi mount is pretty good and can be used in EQ mode with the addition of a wedge. https://www.firstlightoptics.com/telescopes-in-stock/sky-watcher-skymax-127-az-gti.html
  19. Yup and fits nicely into my scope lineup. Hope the OP finds a scope that will suit them but there are so many nice scopes out there now can be a confusing choice.
  20. I’ve found the CC6” holds collimation as well as a mak. Never had to touch the collimation since I got it. You should not disregard the increased resolution of a bigger aperture plus the ability to take higher magnification. My CC6” on a report tripod can be carried outside single handed. Fitted a carry handle to the OTA. Thought about a 4” frac but bought a 5” APO instead. Lot heavier than the CC6” though and requires a solid mount. Not exactly grab’n’go. but a wonderful scope.🙂.
  21. Piano wire is very good and comes in lots of thicknesses so just pick a fine one. You can get it on Amazon or eBay and normaly comes in 1m lengths. Or a local music shop of course.
  22. I’ve had an ST102 and while it was fine for low power wide field use trying to use higher magnification wasn’t nice due to CA and other aberations. One of the other scopes is far better suited for AP due to their excellent quality optics that will allow higher magnification and lack of CA. BTW it shoild be The history of telescopes since Thomas Harriot in 1609 to James Webb. Thomas Harriot was the first person to use a telescope for astronomical observation not Galileo.
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