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About DaveGibbons

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  1. Hi All, Selling my Altair lightwave premium 2" dielectric SCT diagonal. All boxed and pristine . Bought new by me in October 19 . Used 3 times and no longer needed as scope sold . Is as brand new off the shelf . Paid £99 from Rother Valley Optics. Selling for £65 includes first class recorded delivery. Fits later Skywatcher maks as well as SCT . I wii accept paypal as well as bank transfer . Drop me a PM if interested . I will put on ABS if no takers this weekend. Cheers Dave
  2. Very true! I just informed my long suffering wife what is coming . She just smiled and said " life is short " , probably means mine !
  3. Hi All, I will let this go to any SGL member for a reduced price of ***£300****! It is an absolute bargain . I will not be offering at this price anywhere else and I would prefer one of the SGL members to get it. As new, it is optically and cosmetically perfect . Will probably come to my senses and decide to keep it shortly ...Depends how better half reacts when I walk in with 12" dob I just purchased, yes I have a scope addiction ! Merry Christmas all ! cheers Dave
  4. Hi All. I have an immaculate as new Skywatcher 150 Maksutov for sale . It has been used 3 times from new and is perfect and unmarked. Latest version with green dovetail and rear cell compatible with standard SCT accessories. It comes with a new Astrozap dew shield and new Bahtinov mask. I have star tested and collimation is perfect and optics excellent. Comes with standard accessories of 9x50 finderscope an excellent 2" Diagonal that does not need upgrading and a 28mm 2" eyepiece . Only issue with these scopes is cool down the only reason I am selling . I have an excellent 5" apo refractor that cost over four times the price of the mak and they are in some ways similar in performance , the mak besting the apo on double stars once in thermal equilibrium . Reality is 9 times out of ten my observing sessions are unplanned and short so I will be reaching for the refractor. It can take up to 2 hours for the Maksutov design to reach thermal equilibrium and give best view if taken from a heated house like I have to do. These scopes have superb Lunar and Planetary performance and the Maksutov design just excels at splitting double stars down to theoretical limits. It's a nice compact package that sits nicely on an HEQ5 mount and above. Collection preferred in order to preserve it's perfect collimation, although I do have all the original shipping packaging and it has stayed perfectly collimated all the way from China so it It could be posted at your expense and risk. I can only reiterate the scope is in as new unblemished condition and optics star tested by me. You will be saving around £180 as with dew shield and Bahtinov mask costs for package is £540 new selling for £360. ****REDUCED TO £300*** I am in no hurry to sell and would be just as happy to keep scope but if some one is after one it's available. I am located in Southport on North west coast and as stated above ideally l would like scope to be collected . Any questions please ask and you are welcome to come and view scope and have a chat if in the locality. Just to confirm price is £360. *****REDUCED TO £300**** cheers Dave.
  5. Hi All , This will be a fairly brief comparison of 3 different diagonals I have had the opportunity to test in the same telescope over 2 nights and 5 hours observing . It is purely my opinion on what my eye's tell me whilst viewing a range of objects . It is not scientific or technical in any way and I was not intending to write this but thought someone may find it of interest! I recently purchased an as new Skymax pro 150 Maksutov . Technically second hand but it had never been out of the box in anger and never mounted or viewed through . It is the latest version with standard SCT threads on back along with the natty green dovetail. I always find “first light” exciting as all is about to be revealed . Will I be disappointed ? Will this particular set of optics be up to scratch? Will it do what is says on the tin? In particular I was keen to try it out with my Altair lightwave 2” sct fit 99% reflectivity diagonal. As we all all know the standard mirror diagonal is not the best , right? Many people have commented on this over a number of Astro forums and it is often stated as the first “upgrade” you must do. So out goes the scope about 5pm..Out of centrally heated house into near zero temperature . Figure minimum hour's cool down with this type of scope (it took over 2 hr's). Anyway first target I view is the double double using Altair diagonal. This is after an hour and I can still see the heat plume giving that distinctive wedge shape in out of focus intra and extra focal pattern although they are split well and I can already see despite disturbed view that the optics are excellent . I go back out at 8pm and all vestiges of temp difference gone , the scope is in perfect equilibrium now , so I can evaluate the optics. They are superb absolute textbook diffraction patterns on all four components and as always the Maksutov optics excel on double stars , time to chase down more and more difficult pairings. Delta Cygni next followed by the more challenging Lambda Cygni a sterner test. I am now at the limit of seeing condition and can split this sub arc second pairing but the fainter component is going in and out of that elongated smear you get when conditions are not perfect . I decide to just check with a straight through configuration that my Lightwave diagonal is as good as it looks and although requiring a contortionist pose I screw back on the original visual back and put in 1.25” adapter and 6mm orthoscopic eyepiece . Yup that diagonal is converting every photon and delivers all to my eye with absolutely no difference in view to straight through configuration . As the original visual back is now on I decided to use my William optics push fit dielectric just to see if any difference. I use the same reference doubles and pleased to say absolutely no difference in optical performance .It does sit slightly further back from the scope than the screw fit SCT but no issue with either. I now change targets and start looking at some of the tighter open clusters in Cygnus and Cassiopeia .The double cluster is just clearing tall trees and although all can't fit in the Mak's smaller field of view the stars are just pin prick jewels the deep reds of the old giant stars so beautiful , they are apo like. Anyway I am now starting to get cold so pop in for a cuppa and in my now cold conservatory sits the unloved original supplied diagonal. I decide to see just how much better my premium diagonals are so shove it outside for half hour whilst I get a warm. Back out and straight on it Lambda Cygni . The view is exactly the same ...no it's slightly better the fainter component occasionally showing as a star not a smear a clean split. Assuming seeing has improved I put William optics diagonal back in and yes it presents me with exactly the same quality of image and I mean exactly the same . I now go on a tour of all those objects previously viewed with the premium diagonals , not one iota of difference ! Nothing in terms of contrast, colour or resolution . My mind and wallet tell be there must be a difference, perhaps the good but less than perfect seeing is a leveler ? By now cold has got to me and early work in morning, session over. Next night is clear as a bell and I leave the scope and accessories in the unheated conservatory . All back out in garden at 4.30pm and start observing at 7.30 . Seeing is almost perfect . 3 hours later I can say without any shadow of doubt there is absolutely no discernible difference in optical performance not one iota visually on double stars, open clusters and Messier objects . I myself have had some really crappy quality diagonals with new scopes(mostly Meade and Celestron) but the OEM one that came with the 150 pro is excellent . Either I got lucky or Skywatcher have improved quality or perhaps the premium dielectric examples are a bit smoke n mirrors who knows ? Expensive means better right? Certainly aesthetically they are beautiful but I also rather like the rugged utilitarian look of the Skywatcher. Like I said at the start not very scientific and it may just be a case of my eyes not being able to see the minute differences between optical surfaces or maybe just maybe we convince ourselves expensive must be better . Blind testing anyone ! Cheers Dave.
  6. Hi All, I recently purchased an unused Skymax pro Mak that came with a brand new unused Baader Dimond steeltrack focuser attached. I do not need it as I am purely visual and have a high end screw on Diagonal that fits straight to the tube . The standard focus knob is fine for me. Both it and the scope had never been used. It is perfect and liquid smooth . It has original box and supplied Alan key for changing adapters. It will fit any Standard 2" SCT thread . Will also fit the later Skywatcher Maks . Superb for imagers who need to achieve critical focus and need to hang camera kit off the back . These Diamond Steeltrack 2" focusers lift a payload of 6kg (13 lbs) straight up, without slipping . All I have done is remove it from the OTA and replace the supplied 2"compression ring fitting back on. I am asking £160 this will include first class recorded delivery. Cheapest I could see this new is £230 and you would would be getting a good saving on an as new item from me. Please note I am firm on price and not really in a hurry to sell. Any questions please ask. Cheers Dave
  7. Hi David, I think you have made a sensible choice in keeping your C9.25. Looking at your lunar image cannot see any great advantage in going for the 180 Mak. Don't get me wrong I have actually owned 3 of them along with 3 C9.25 's. All you will gain is extended cool down times and perhaps a minuscule improvement in image sharpness and contrast and if optics perfectly collimated from factory they more or less stay permanently that way. Unless you keep in an unheated garage/shed /obsy getting perfect thermal equilibrium can actually take several hours especially if temperature is dropping away. I still love the 180 Mak and if I did not have either scope I would happily go for a used 180 purely on cost . I do think the C9.25 is slightly more versatile for general purposes at f10 and extra aperture always welcome , however as I own neither at the moment I am tempted by John in Derby's 180 Mak in the for sale section ! Cheers Dave
  8. Sorry James. Should have closed this earlier. The motors work fine . Thank's for the offer. Cheers Dave
  9. Hi James, I think I have rectified the problem it appears the RA worm was binding and stalling the motor. I Stripped down and re set worm and all appears OK now. I say appears and need to check tracking under stars this weekend just to see if any damage to motor. That seems a fair enough price and if I still have problem will take them off you . I will know in a day or two. cheers Dave
  10. Hi All, Does anyone have old HEQ5 non goto set of motors lying around. My trusty old black HEQ5 mount's RA motor has given up the ghost and needs replacing Probably someone who upgraded to the goto kit may have one. Anyway let me know if you do and what you want for it. cheers Dave
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