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johninderby

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Everything posted by johninderby

  1. I think the better the seeing conditions the better the neodynium filter works. When seeing is poor no filter is really going to help.
  2. My XW 5mm hasn’t had a lot of use lately. Seems all right but wish it had a wider fov.
  3. The Baader Neodymium filter is the one I use on all the planets. Find the polariser does help sometimes when used as well as the neodynium.
  4. Funnily enough I just ordered one for my Bresser 100 mak. I had been watching it on eBay and the seller sent me a 10% off offer so a few pence saved.
  5. Just putting the variable filter on the eyepiece nosepiece is the easiest way. Then just pull out the eyepiece and rotate the filter. Usually only takes two or three times to get it adjusted right. Another way is to use two single polarising filters. One on the eyepiece and one on the 1.25” to 2 adapter. Then simply rotate the eyepiece to adjust. I have a 2” variable polarising filter which I removed one of filter elements to make it into a single filter. I already had a single 1.25” filter that I use with my solar wedge.. For some reason single filters aren’t cheap and many of the variable filters can't be seperated into two singles. .
  6. Partly depends on if you want to point your scope at the zenith or not. Long scopes do need a bit pf planning to avoid the legs if not using an extension. BTW the 127L isn’t a long scope. This is
  7. The 127L is a very well regarded scope but bigger and heavier of course. 8kg v 5kg. Think you would need the pillar extenstion with it. If the size isn’t a problem then yes worthy of consideration.
  8. I have had absolutely zero problems using the Duracell Precharge AA 2500mah batteries in my AZ-GTi mount. Hold a charge for. 12 months. The specs for the AZ-GTi mount say 8 to 14 volts required. The precharge batteries do hold their output better than regular rechargeables though which probably explains why they work well for this mount. Of course no handset used so using a handset could give problems. I do have a Tracer LiFeP04 battery that can be used but not needed it yet.
  9. Have you downloaded Sharpcap? Using proper imaging software will help a lot. https://forums.sharpcap.co.uk/viewtopic.php?t=1695
  10. Same as the Altair version. . https://www.harrisontelescopes.co.uk/acatalog/altair-starwave-f11ed.html
  11. The Vera Rubin Observatory 3,200 megapoxel camera. https://www.space.com/vera-rubin-observatory-record-breaking-first-photos.html Don't think it’s going to fit your WO Redcat 51.
  12. If the aperture remains the same it is the focal length that affects the amount of CA. If you change the aperture then that does effect the amount of CA as well. Further reading on the subject. http://www.maa.clell.de/Scholar/chromatic_aberration.html
  13. At least it won’t be hard to fix if it does either by fitting a pillar extension or a tall dovetail plate.
  14. Maybe? but not sure. Perhaps using a tall dovetail plate would move the OTA out enough to clear. https://www.firstlightoptics.com/adm-vixen-type-v-series/adm-vixen-type-dovetail-with-wide-top.html
  15. CA (chromatic aberation) or false colur becomes more of a problem the shorter the focal length with a achromat which is more important for lunar / planetary observing as you will be using higher magnifications. Not such a problem with DSOs at lower magnification.
  16. It all depends on your mount. Perhaps a pillar extender like this would give you the clearance? https://www.firstlightoptics.com/sky-watcher-mount-accessories/skywatcher-eq5heq5-extension-tube.html The shorter 102 is still a good scope but will have more CA but a wider fov.
  17. Think Bresser’s arrangements with Meade and Explore Scientific doesn’t let them compete in the US market and TS is a German telescope dealer so would need to set up a US distrubution centre to compete in the US narket so might not be worth it to them?
  18. A filter is a good idea but prefer a variable polarising filter. Really helps on Venus as well. https://www.firstlightoptics.com/moon-neutral-density-filters/astro-essentials-variable-polarising-moon-filter.html
  19. No JOC is only a part owner. Bresser is jointly owned by Mr. Rolf Bresser, Jinghua Optical + Electronics Co. Ltd. and Helmut Ebbert. Shares: Mr Rolf Bresser - 40% Jinghua Optical + Electronics - 40% Helmut Ebbert. - 20%
  20. Had a look and could only find the low end Bresser scopes in the US.
  21. It is in stock at Harrison thpugh. so still possible to get one in a few days. I have noticed some astro items being sold at nearly the new price.
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