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Dellis

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Everything posted by Dellis

  1. To get to the menu: Scope setup > Filter Limits Dave
  2. I agree, Nexstar shows what's visible as default but you can change the setting to show all. Not sure why you'd want to to but it's there. I've just re-read it in the instructions and I quote; " If you want to explore the entire object database, set the maximum altitude limit to 90⁰ and the minimum limit to -90⁰. This will display every object in the database lists regardless of whether it is visible in the sky from your location." Hope that helps. Dave
  3. Yes it's all my fault that the clouds have rolled in, my new scope arrived yesterday one of the bargains from FLO a C925/CG5 GT. Great service as expected from FLO, a few emails exchanged over the weekend order placed on sunday boxes arrived on Tuesday. I spent last night setting up the basics, trying out the Nexstar, adding my 2" diagonal, removing the standard finder and fitting the Telrad. I fitted the polar scope but didn't have time to calibrate or align it. Looking at the forecast today I was hoping for a clear evening and left work in beautiful sunshine, looking good so far, I arrived home and setup the mounted with a very rough polar align (polar finder still not calibrated or aligned), mounted the scope and went in for a bite to eat while the scope cooled. I'd ordered an Astrozap dew shield with the scope but they're out of stock so the next little job was to knock up one from an old camping mat. I don't need too much time for the scope to cool as it's stored at pretty much ambient temperature. After dinner I went out and started the alignment routine which was slightly interesting as I hadn't aligned the Telrad but I did a two star align using the first two recommended stars Capella and Rigel, I didn't add any calibration stars or complete a handset polar fine tune but slewed to Jupiter with a 16mm ep fitted and there was Jupiter just off centre at 146x mag. I was really pleased with the accuracy considering the fairly sloppy set up routine. The view of Jupiter was spot on a really nice first target and one close to me heart as it was the first ever object I observed with a telescope. I aligned the Telrad and was keen to check collimation slewing off to a bright star and if was spot on! This is the third new Celestron SCT I've owned and all three have arrived in perfect collimation which never ceases to amaze me bearing in mind the journey they have all made half way around the world. I popped a 26mm in and slewed to M42 which was again very close to the centre of the fov. This time the murk had set in so I can't really pass comment apart from the clarity of the stars. By now the high clouds were starting to form and I called it a day after a very pleasing first hour with my new scope. I'd was a bit concerned about the mount and it's ability to carry the C925 but I needn't have worried, there's a bit of wobble while focusing but it damps almost immediately and wasn't an issue. As has been reported widely the motor are a bit noisy when slewing but not as bad as I'd expected. All in all I'd say the mount is close to it's limit for visual but perfectly acceptable however it wouldn't cope with this weight of scope for photography which isn't an issue for me as I'm purely visual. Dave
  4. C 925 Ordered on Sunday arrived today Only problem is I'm at work all day........ Anyway a great price and excellent service Thanks FLO Dave
  5. The magnets weigh approximately 200 - 300 g each. I thread the weights onto the magnets and use the magnets to attach to the scope, I have four weights 3 x 1 kg and 1 x 0.5 kg and attach 2 x 1kg to the front and use the 1 kg and 0.5 kg to adjust the balance (these are the weights pictured on the thread I pointed to above), I need a fair bit of weight as I have a Telrad plus a 10 x 50 finder before I even think about a nice heavy ep Don't forget you need around 3 x the weight of additional accessories in balance weights. The dimensions of the weights are 65mm dia x 40mm for the 1 kg and 65mm dia x 20mm for the 0.5 kg, these are within 30 grammes based on a specific gravity of 7.85 g/cm3 for mild steel and allowing for the threaded hole, they can be fine tuned if an exact weight is required by drilling to reduce the mass. The accuracy doesn't matter as they'll be attached to the magnets, but I just wanted to have exact weights so they could be used for other purposes if needs be. Hope that's of some help. Dave
  6. Have a look at post number 5, the link on that post takes you to the right page of the e-magnet website and I've used the E622 type. Dave
  7. Having got a bit fed up of humping the scope in and out I decided to add some wheelbarrow handles...... I tried bolts with wing nuts but they were too much of a faff in daylight let alone in the dark with freezing fingers so had a rethink and opted for brackets on the side of the base that the handles could slide under and just lift - easy peasy and works a treat. I extended the handles beyond the wheels so I could store the handle vertically without having to chock them. Dave
  8. I'd agree that this would be ideal. As Olly says a reflector is maybe a bit too vulnerable for an eight year old..... Dave
  9. I've pretty much decided to bite the bullet and buy one and will opt for the V2 as the head is exactly the same as the Pro with the only difference being the more robust tripod and the addition of a Losmandy dovetail clamp. I don't need a Losmandy dovetail clamp and a 2" tripod is around £120 which turns the V2 into the Pro for £920 minus the Losmandy. Dave
  10. Thanks for the replies and nice to hear such positive views. Looks like I may be going shopping Dave
  11. My first go-to was the Celestron Nexstar which after a sticky first session where I had the latitude and longitude values the wrong way round I found to be easy to set up and accurate. Second was another Nexstar this time with GPS and this was even easier to set up and just as accurate. I always three star aligned and this probably helped with accuracy, both were altazimuth. I currently have an EQ5 with Synscan and again easy to set up and accurate, I use this mount with my 102mm refractor. For me go-to helped get me started and allowed me to see objects I did not have the ability to find. I now like the go-to on my small scope but really enjoy the hunt and satisfaction of finding objects myself with my dob. Best of both worlds and why not Dave
  12. I currently own and use an EQ5 to mount my 102mm F7 refractor and am considering getting myself an iOptron Minitower to replace the EQ5. I've dabbled with astrophotography but it's not for me so I'm thinking I would like the ease of setup and viewing comfort offered by an altazimuth mount and with that in mind I'm interested in users experiences of the Minitower particularly with regard to stability, vibration and reliability. If I go for one it may well be a used V1 although I may go for a V2? Dave
  13. I had an 8se a couple of years ago and that was definitely prone to vibration and the main reason I sold it. With hindsight I should have kept the ota and flogged the mount as the ota was optically stunning. Dave
  14. I see colour using either of my scopes and would expect your scope to show colour too. However as has already been said the colours are subtle. Dave
  15. I haven't used a fuse for two reasons: i) the cigarette lighter plugs that plug into this are fused. ii) the connection to the battery is via crocodile clips and these are only attached when in use. Dave
  16. Just had confirmation from Stellarium that the bug is confirmed. Dave
  17. Just typed the above and realised that I’m typing on my work laptop which is a Windows machine and I have one of my Macs with me so I’ve cross referenced the machines and found where the problem is. Stellarium on the Windows machine agrees with Skychart on the Mac. Stellarium on the Windows machine DOES NOT agree with Stellarium on the Mac. Before I did this comparison I double checked the setting in all three programs and they are all identical so it looks like the issue is with Stellarium on my Macs and I’ve no idea how I sort that one! Any ideas? Dave
  18. 1. Yes I mean greater - it was late... 2. Set at 38 metres which is correct for my location 3. Checked lat/long 4. I did set to Polaris initially then susequently set to other objects - should have made that clear 5. I haven't used Skychert to calibrate the dob but the differences I was seeing between Stellarium and Skychart were in line with those I was seening between the dob and Stellarium - I will try with Skychart but the earliest, cloud permitting, will be the weekend 6. Stellarium and Skychart are running on the same machine a Macbook Air - all settings are identical; lat/long, time, date, altitude (Ihave a second Macbook which has exactly the same settings as the Air which I looked at later on to compare Stellarium on both machines and they were in sync) Thanks for the input and if anyone else can think of anything else to check please let me know. Dave
  19. No more ideas???? I've just reported the problem to Stellarium directly. Dave
  20. Hi Steve, The GPS coordinates are spot on and are set exactly the same in both Skychart and Stellarium. Dave
  21. I've added a levelling base to my Dob to get better accuracy using the azimuth setting circle, I'd previously had accuracy issues and attributed this to the base not being level hence the modification. Anyway I get out this evening, the first semi clear sky since I finished the base, carefully levelled the base turning the spirit level to ensure everything was done to reduce any chance of errors all good so far. I then fired up Stellarium and looked up the Alt Az for Betelgeuse and adjusted the pointer on my scope base to match the azimuth then spun the scope round to Merak read off the azimuth referred back to Stellarium only to find it was a couple of degrees out. I went back in and double checked the time and location I had set on Stellarium and it was and still is spot on. I repeated this throughout the sky and it was the same story. I'm back inside now having spent the evening trying to understand the problem, re levelling the base, re checking Stellarium, re aligning and all to no avail, I've even checked the accuracy of my degree circle which is spot on. I then came to the conclusion Stellarium was wrong opened up Skychart checking location and time against Stellarium and both are identical. I then looked at a few alt az coordinates for various objects and found a discrepancy between the two programs with Skychart showing 4 degrees higher azimuth reading than Stellarium exactly what I'd seen earlier with the scope after aligning to Polaris. Thus Stellarium appears to be showing incorrect alt az coordinates. The obvious answer is to use Skychart but I find the program very clunky when compared to Stellarium so would prefer to find out what's going wrong. I have another machine running Stellarium and that shows exactly the same alt az as machine number one???? Any ideas? Off to bed now.... Dave
  22. Here's the pic of wiring. In basic terms the negative black wire is connected to the terminal that connects to the outside of the 12v socket and the positive red wire connects to both centre terminals. Hope that's of some help. Dave
  23. Go for a Dobsonian like this one or this one. Both will give great views and are excellent value. Dave
  24. Dean, I'm home tomorrow I'll take a pic then but basically I've just wired the two sockets in parallel. Dave
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