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About SIDO

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    Star Forming

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    Friendly, Encouraging & Positive Science and Astronomy. Anything short of that is unacceptable...
  • Location
    United States Wisconsin
  1. SIDO

    Why can't i see M51

    I have somewhat dark skies and for me M51 is more a summer object and better viewed nearer the zenith, at that time of year it is a marker galaxy letting me gauge the seeing by its presence, if I can see It then the catseye can also be seen and so on. Some nights even though a milkyway is observed M51 is absent on other nights were the milkyway is very faint its easily seen so a good indicator of the seeing. I don't think it's a dependable target under light polluted skies as its currently placed, beautiful galaxy to observe though indeed...
  2. One must also not forget a single polarizing filter is also variable too but in the sense that you go from zero polarization to full polarization when rotated. Just screw either half of that polarizing filter set on an eyepiece point the scope at the moon and rotate the eyepiece while observing and you will see a very marked improvement in contrast and detail once the single polarizer is tuned the image will be at it's darkest...this is using a single polarizer with a tuned correct alignment and the visual effect it has on an image is quite stunning. Now...keep the eyepiece and initial polarizer orientation exactly the same and remove the eyepiece and screw the other polarizer on to the first and but keep the orientation you had when aligning the first half of the filter set and place the eyepiece back in the scope...now as long you keep the first filter, scope and eyepiece aligned and tuned and rotate only the second filter you will be operating what is considered a tuned filer set. Meaning you will have both the benifit of polarization and diming were as if the closest filter to the eyepiece or camera is not tuned you are only taking advantage the the diming effect of the stacked polarizer and not useing the full capabilities of the polarizing filter set. You will see a marked improvement when useing either a single polarizer or a set when properly tuned
  3. SIDO

    Hello from England

    Welcome Dave, Best of luck with your relocate Clear/Skies !
  4. SIDO

    Oh God is this the Future?

    Because of dispersion this will ruin the views for those well beyond China, the list of issues with this are long but to start with cloud and smog will not only interfere with the light hitting the ground but these phenomenon will disperse it variably on any given night making both its brightness at ground level vary and also the area covered or lit broader or narrower as well the light unlike street lighting will cause many areas to remain shaded and dark and in these locations streetlights will still be needed. Biologically many organisms will be affected as bird's that don't fly at night now will as not only the ground will be lit but the sky as well. Animals and insects have evolved by species separately for both day and night hunting, foraging and mating adaptations and this will most assuredly have a negative effect on the biology in and around the areas lit by such a device. There are more negative effects but I'll leave some room for my fellow SGL'ers to explore some of those and close by saying, So much for amateur astronomy in China
  5. I understand the difficulty of using an eq mount both from a physical disability standpoint and the added complications an eq mount brings, having trouble aligning the finder can more easily be overcome than a physical limitation with the mount. I agree a conversion to alt az might indeed help if that is the case so if someone close by is handy converting and useing eq mounts can pop by that might be your best route to get on. Is there a local club you can call on to help? I struggle myself now with an eq mount and have been using them for a long time, best of luck And Clear/Skies...Freddie.
  6. On nights when the moon is tracking low I find if I can get the scope shaded from it's light targets to the north are better, I'm at 43° north...these nights are few but recognizing them when they occure can buy a few targets otherwise gone unseen. Full Moon or near full moon with even moderate light pollution then stick to bright open clusters, double stars, planetary, satellites, space stations, planes, bright comets/asteroids, meteors and of course the Moon
  7. SIDO

    First Man

    I caught the flick in Imax yesterday, in my humble opinion it's an ok movie but in regards to the title and the significance of the subject matter it severely lacks the importance of the time in history in which the events occure. Another down side is the lack of a flag planting scene, this being left out I feel was a disservice to the astronauts being represented so in good faith I will include the missing footage in a link below.
  8. SIDO

    Hi from a total newbie :)

    Welcome, Clear Skies and The Best of Luck
  9. Very good idea, I have to wait for tax time to be over before getting my Nv gear I expect to owe a considerable amount, so I'm hanging tight for now but am looking to a 73mm ed with some fpl 53 glass and an ultralight hd photo tripod with a small slow motion controlled alt az head which I suspect it will be expensive. Will try to keep the weight at or below 10lbs for the scope and mount. 5.5lbs for the scope I like and I haven't decided on a mount yet, 12lbs will be the absolute limit and I'll carry the Nv out seperately. The 9x50 you intend to use is all of a little more than 3lbs with the diagonal I suspect, will the Nv work in a 1.25 barrel? Getting mine together won't happen soon enough, I so can't wait Although it won't be a handheld scope but it will be a Richfield one, I will of course use a laser to guide it and am now researching small dc heating elements to install directly inside the laser housing itself and utilize a small external low voltage regchargeable battery, when I get the cold weather laser conversion design complete I will post it in the diy thread. Something like this would be nice for your build too, a penlight green laser would be nice on that 9x50...
  10. SIDO

    Meade "Polaris" 90mm f/10 Achromat

    Here's my 1990 390 Az, old pic quite a few upgrades since then. Only thing still original are the tube, cell and shield, has had a ton of work done over the years. Can't lift it anymore due to disability.
  11. SIDO

    Meade "Polaris" 90mm f/10 Achromat

    Meade still isent painting the tube ends going into the cell it looks like in your photo, and I've also seen cell retainers and bottoms unpainted on these scopes. No different than in 1990 in that regard
  12. SIDO

    Meade "Polaris" 90mm f/10 Achromat

    That's a nice scope for a bargin, makes a good solar scope too with the appropriate filter. Nice work extracting the set screw by the way, I see your set up alt az so if that's the intent rotating the diagonal will work to get more headroom for the magnified finder but it will set you a little skewed or not looking straight down into the eyepiece with that setup...a set of rings and dovetail would solve it...good scope though, should put up some nice views
  13. SIDO

    Soyuz launch failure

    Glad everyone is ok, the media here in the states are already questioning the continued viability of the Soyuz program based on this failure alone...really an awesome program though for many decades and with a safety record that rivals most any out there. I think its important to remember We don't do these things because their easy, We do these things because they are hard.
  14. Well I finished the handheld 150/750, The conversion I chose or came up with required no drilling or permanent alterations of the ota. A handful of stainless nuts, bolts and a couple stainless washers are the fasteners, One thrift store nylon guitar strap, 2 aluminum Scooter Pegs, 1 binocular adapter, 1 smartphone tripod adapter, 1 laser mount, 1 cheap but very nice laser. The strap swivels and I installed it for carrying on the left shoulder as this is nice for quickly moving about through the small corridors in my home as I'm headed to and from the observatory (driveway) this can be set up for right shoulder carry as well. The smartphone is my dedicated star phone, not connected to the internet or an active phone but loaded with sky tools, charts and apps for astronomy. The whole thing smartphone included is 9 & 1/2 pounds so just under ten pounds with a 32mm eyepiece added maybe 10 pounds with the 8x24 Celestron zoom. Really nice outcome for no alterations drilling or permanent modifications I thought. One could also use folding bike pegs or just bike pegs too if larger handles are desired...foldaway I thought was a cool idea but decided to keep it light weight as the Doctor has me on the 10 pound limit. Without the smartphone the total conversion cost was $80 so really resonable for the price. I am using my 23mm illuminated crosshairs eyepiece for sighting the laser, a #9 Nd filter in combo with a #6 Nd filter quiet the laser dot down enough to sight it in at 100yds at night, makes the dot nice and tight for accurate sighting too. I decided to add the phone and adapters after realizing I would only hit 9 pounds without it and it has an app to dark adapt all other apps, clear skies are now all that's keeping this contraption from official first light as a completed unit Be great if things clear soon, One can only hope!
  15. SIDO

    Newbie help needed

    Very well said and a good suggestion, it can be difficult getting started with a 60mm Alt Az scope as the light grasp and lower magnifications can frustrate even an experienced observer if he or she is used to higher end equipment. Hang in there, and you will succeed

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