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  2. I have had the 10x50 variant for a few years. Excellent performance for the money. Yes I paid full price. Double todays offer.
  3. Here is a link to the video. This is good if you wish to explore the theory a bit further.
  4. I have just been reading through some targets you sent me in Canes Venatici and lo and behold you done a report. I keep going back to this constellation for M51 to see if I can get a glimpse through my scopes.(No luck yet) I see that 8" is performing brilliant again. Rain here massive thunderstorm about 6pm then sun come out then back to thick cloud and rain.
  5. Absolutely. I'm just trying to get my head around what sort of trails could occur if there's no tracking in DEC and the only possible errors are polar alignment and RA periodic error. James
  6. I rechecked PA with the camera on, Polaris was still within the ring which shows the tripod hadn't shifted. It was just a rough polar alignment though, straight trails wouldn't have concerned me. I doubt my polar alignment was good enough for 5 minutes at 135mm pointing south, but the longer exposure makes it easier to see any misbehaviour from the mount.
  7. Last week week when there was a prominent sunspot group on the solar disc, this was easily visible through my Lunt 8 x 32 Sunoculars. John
  8. Looking for an 8" Dobsonian - presumably Skyliner 200P or SkyQuest XT8 - in gently-used condition. Don't need eyepieces, as I have several Orion Plossls. Located in Leeds and can drive to pick up.
  9. Just to emphasise this point, this picture was taken with a 50mm Spotting scope fitted with Baader Solar film, and using x30 magnification. I suspect your problem has been the lack of activity ie nothing to see! Keep an eye on SGL and also the apps which the guys have posted and try again when there is a good sized spot visible. I enjoy using a 4" refractor with a Herschel Wedge and find it gives excellent detail when conditions are good. I use a binoviewer in it as it helps reduce the impact of floaters which I suffer from, and also allows more relaxed viewing.
  10. Hi James - If it is a serious error and the drive wheel is a little eccentric then there may be a speed variation causing the brighter patches...?
  11. Hi guys What type of Grease would I use for a strip and refurbishment of my Eq6 pro. There is a couple of tubs of geoptik Grease you can buy but at 18 quid pop its a bit on the expensive side. I did it a couple of years ago and it is very stiff just wondering if I used the wrong grease but this time I'm going to fit a belt drive. Regards Solarboy
  12. Steve, I already investigated this very topic. What I found out from pictures on the web is, that the SW-extension on the tripod and the AZ-mount head will fit together. The SW extension on the iOptron tripod will probably not match. The SW tripod has a center recessed hole and into that hole (3cm diameter?!) the counterpart of the SW-extension fits. The iOptron tripod has a flat surface, which will make using the SW-extension on the tripod incompatible. regards Michael
  13. Given that only the RA axis is driven, if there's periodic error and that's the only problem, shouldn't the trails be straight rather than jagged? Or perhaps only deflect in one direction? James
  14. First do a good PA with the weight of the camera/lens etc on the SA then try your exposures again. My first results were similar because I 'had to use it' but never took the time or care over the initial set-up. Mine works fine now with a 430mm fl scope mounted and DX format camera. These images were taken with mine when reviewing a WO ZS 73 APO:
  15. Thanks all for the heads up on this one. My local council have already installed of few of these around the corner from my home. I'll take another look at them and try to ascertain beam brightness and direction. Will report back.
  16. Even a 9x50 finder will show spots. There are filters made to fit finders. I’ve used one as a quick look scope to see if it’s worth getting something bigger out. There is a very usefull app called Solar Monitor Pro which I use on my iPad http://www.solarmonitor-pro.com/ipad/ Or the simpler iPhone / iPad version https://www.solarmonitor-app.com/
  17. I have only the single stack. Interesting you have to get such a high pressure, I've only ever found one other to give a reading and they said around 17-18 for a sweet spot. I've been upto 23psi without seeing any difference - so fingers crossed and it is down to this mucky green filter. Not looking forward to changing it, the process has been described as simple/straightforward with clear instructions.
  18. I turned mine through 90° putting the fine focus knob on top where it's easy to get to.
  19. We have, in the past, briefly considered a society Observatory, one member even looked at a possible plot, the eventual cost of which would have taken several years membership fees. Needless to say, we don't have one. Most considerations have already been covered - security, power, water, insurance. Also consider access/parking, can be problematic just for members but more so when expanding to outreach. Apart from the physical aspects of the build you will also have to manage access to the Observatory. The members will have paid for it so should have access to it, but who has the keys? Must an authorised member be on site to supervise? Will set up be for visual only or will imaging be allowed? If the latter do you allow members to bring own cameras to attach or does the society provide. Having spent many thousands on the build then it should be used, ideally, on every clear night which means that an authorised member must be also available. None of this is insurmountable, but will need a dedicated team to manage the observatory. Rob
  20. Think the tripod was reasonably stable and I stayed well away from it for the longer exposure. I don't remember much wind that night but I could probably find some weather station data to confirm. I've used 135mm lenses on three other mounts before and while I've had streaks due to balance problems or misalignment I haven't had a flock of seagulls before.
  21. Sorry I meant your stacked image ie fits file , and as above screen shot your final image
  22. Any telescope that will give you sufficient magnification will be suitable. I've used my Meade refractor, suitably filtered using a solar filter, to view sunspots. Unfortunately, the sun is very quiet at the moment with little activity. https://sohowww.nascom.nasa.gov/ https://sohowww.nascom.nasa.gov/sunspots/
  23. Looks good to me too. As you say, no darks applied . When you do, as long as you have DARKS at the same temperature and gain then Amp Glow should not be a problem. Not bad image for starters. Well done.
  24. well to me, I'd say the stars in the classic version all seem to be a pale shade of purple ? I'm a sucker for sciencey things so would always go for the PCC but it does make your galaxy look a little red. Did you apply Background Neutralisation after PCC by the way ?
  25. ASTAP works under Windows/Linux and does stacking and platesolving even has a Planetarium option called HNSKY http://www.hnsky.org/software.htm - I dont use it so cant comment on how good/easy it is but Hans,the author I beleive, is a registered SGL user. But there is no problem doing post processing on any other OS that works for you
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