Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

stargazine_ep3_banner.thumb.jpg.5533fb830ae914798f4dbbdd2c8a5853.jpg

JonCarleton

POLLEN!! What's the best way to clean a reflector mirror?

Recommended Posts

It figures!  First clear night in ages and the pollen is as thick as..well, something really thick.  Up to now, I have been fairly careful to avoid dust getting down the tube, but pollen is going to be unavoidable for the next several weeks.

So...what does one do?  Are there some do and don't things I should be aware of?  It looks like my mirror comes out fairly easy (SkyWatcher 10" ).  I'm guessing  "chuck into the dish washer on the pot scrubber setting" is probably a really bad idea.

What then, is the plan?  What chemicals/detergents should be used...or maybe all chemicals should be avoided?  Is it a no-touch surface?  Is there perhaps some magic spray that one uses?  I do have a can of electronics air that I plan to use from a safe distance to persuade away loose pollen, and that may be enough for the present.

 

Share this post


Link to post
Share on other sites

Do NOT use canned air on mirrors.  It will spew impurities all over it.

20180315_015109.jpg

Take a read of that thread.  It has some good information on cleaning mirrors.  Personally, it takes a lot of dust on a mirror to have any visible effect on the contrast being provided by the mirror.  It won't degrade light gathering or resolution to any measurable extent.

  • Thanks 1

Share this post


Link to post
Share on other sites

Thanks!  Great content and the videos answered my question. 

By the way, the can of spray air I have is specially made for harddrive clean rooms and has no foreign elements to spit.  Still, I will probably not use it and stick with the wet methods from the videos.  They look fairly simple and straight-forward enough to get right.

Share this post


Link to post
Share on other sites
1 hour ago, JonCarleton said:

Thanks!  Great content and the videos answered my question. 

By the way, the can of spray air I have is specially made for harddrive clean rooms and has no foreign elements to spit.  Still, I will probably not use it and stick with the wet methods from the videos.  They look fairly simple and straight-forward enough to get right.

The only safe method I know of for sprays is using CO2 as in some fire extinguishers.  Professional observatories do "snow" cleanings on a regular basis between long term washes.  Even then, they have to have filters in place to prevent wayward oil from contaminating the mirror.

  • Thanks 1

Share this post


Link to post
Share on other sites
Posted (edited)

This stuff is mostly nitrogen, I believe.  Any contamination would ruin a harddrive.  Not the same as you buy at the office supply store.

OK..edit-edit:  pure nitrogen, it says.

Edited by JonCarleton

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By Hislip5354
      Hello all, 
      New to the hobby and eager to learn information about where to start. Mostly interested in planet viewing, especially the moon. Looking to start out and need the portability as i may have to get out of town a ways to really get a good look at the heavens. I'm considering  either a set of 20x50 or 20x80 binoculars (tripod mounted) or  getting a Meade StarPro AZ 90mm telescope. Both are within 50$ of each other online. Wondering what would be my best bet for starting out, I will be staying focused on the moon for now, and thats my #1 priority (seeing the moon in extreme detail) but may soon get into farther planets/galaxy observation. 
      I greatly appreciate any advise.
      thank you. 
    • By Stefann
      Hi everyone, about a month ago i got my first telescope. Wasn't sure what to get but i wanted something portable and easy to setup and use. After some internet "research" i decided to go for a refractor on a manual alt/az mount. The telescope was on a 50% sale so i decided to go for it , the Meade infinity 90.
       
      The package:
      The scope came in one big box, everything was inside. Included was the optical tube, the mount, 3 eyepieces (6.3mm, 9mm and 26mm), a 2x barlow lens, 90 degree diagonal, red dot finder, an eyepiece holder for the mount and a few manuals. The optical tube:
      The tube has a 90mm (3.5in) aperture and 600mm focal length. It looks and feels as a quality instrument, it has a small dew shield and the focuser is smooth when you move it back and forward. As expected the lens looks to be coated. It has a dovetail bar on it with 3 holes for screws. The mount:
      Light but stable, made of aluminium. It has 3 extendable legs, and 2 slow motion cables (alt/az). One screw to mount the tube on on top (adjustable back and forward). The eyepieces and barlow:
      All 3 are modified achromat eyepieces, the lenses are made of glass and are OK for the beginner, but i would suggest upgrading if you can. The barlow is bad i even think that the optics are plastic (not sure), it is usable if you don't have other options but this should be the first upgrade in my opinion. Observing: First light:
      The telescope arrived in the morning so the first thing i did after a quick setup was to adjust the red dot finder. I looked at some mountains about 20km away, the view was nice and very detailed using all eyepieces. Combining the 6.3mm with the barlow got me a bit blurry view, but the barlow in combination with the other eyepieces was ok. Night came and it was a moonless and clear night (only light pollution from the city i live in). I saw orion right infront of me, "marked" it with the red dot finder where i thought M42 should be and looked through the 26mm eyepiece. It was a bit blurry but after adjusting the focus i could see some nice pinpoint stars and also something fuzzy, i realized it was the orion nebula. After letting my eyes adjust to the view for a few minutes i started seeing 2 faint "wings" on both sides and in the center were 4 very tiny stars, i didn't expect to see that on my first night. I followed my target for about 15 minutes using the slow motion controls , it was easy to do. Also tried the 9mm eyepiece and with it the 4 stars were more easily seen but the faint clouds got fainter so i moved back to the 26mm. Next target was venus, i tried all eyepieces + with combination with the barlow. It looked like a very bright half moon without any details. When using the barlow the view was ok but purple glow was showing around the planet, without the barlow the purple wasn't noticeable. I also looked at the star Sirius which looked nice, bright and much bigger then any other star i could see that night. After Venus went down i decided it was enough for day one. Moon:
      I expected it to look good, but not this good. I was observing the moon for a couple of nights until it got full. I could see a lot of details at the terminator , with low and high magnification. When the moon was full it was very very bright and it looked best with the smallest magnification using the 26mm eyepiece. Jupiter and Saturn:
      I got 2 opportunities to look at these 2, the first time i think the "seeing" was bad. I could only see Jupiters 4 moons and the planet was a bright disc without any details at any magnification i tried. Saturn also wasn't very good, i could see the rings but they were blurry and "dancing" around. But the next time i had the chance to look at these planets the conditions were much better, first target was again Jupiter. With the 26mm eyepiece i could see a white disc with 4 moons.With the 9mm i could see the moons again but now the disc had very faint 2 bands without any color. The view was best with the 6.3mm eyepiece, the 2 bands were clearly visible and on the upper belt on the right side there was a small dark dot, i am not sure if it was anything . Next target was Saturn, event with the 26mm eyepiece i could see that it has rings, i switched to the 6.3mm right away and wow there it was, Saturn and its rings clearly visible, i even think i could spot the cassini devision, but it might have been my eyes playing tricks. I tried using the barlow on both targets but it was making the image blurry, but at this point i had purchased a higher quality barlow and the views were very nice with it , but the  max magnification i could use that night was 133x, anything higher and the image was getting wobbly (probably that was due to the atmosphere that night). After that some clouds came in and it was time to get back to bed (got up just to see the planets in 4am). Conclusion:
      I think i got what i wanted, a small and very portable telescope for some basic amateur observing. I do recommend this telescope to anyone as a first telescope or even to an experienced astronomer who is looking for something light, portable and being able to set it up and start observing in 2 minutes. Also i would recommend you replace all of the eyepieces and the barlow. I got me a few plossl eyepieces and a nice barlow, it was worth it.
      Feel free to ask me anything regarding this telescope i will be more than happy to answer.
      Sorry for any spelling mistakes this review probably contains

      Also i am attaching a few images i took directly off the eyepiece using my smartphone (handheld).


      The Telescope

      The Moon:

      The Moon:

      Venus:

      Saturn:

      Jupiter:

    • By MrGuGuZai
      Skywatcher skymax 90mm mak or Skywatcher evostar 90mm.

      which one is better for planetary?
    • By jackrussell0232
      Who knew renovating a house could take so long - and it's still a long way from being finished (maybe I shouldn't have tried to tackle it all myself...)
      But having finally uncovered some of the boxes containing my kit, and with a bit more free time than normal, I decided to have another go, starting with one of the top targets this time of year. (I am working from home, honestly).
      I felt like I was learning again from scratch.  But at least I've discovered the masked stretch.  This image might be over-saturated for some tastes, but what can I say, it's the first time I've managed to get any colour in my
      stars! 🙂
      20x10 mins L
      10x300s RGB
      Altair Astro Wave 115 refractor, SBIG STF8300M, GM1000HPS (never managed to get it to track unguided, but at least it can be guided now)

    • By MrGuGuZai
      Hi, want to get a new telescope, SkyWatcher Evostar 90 EQ2 or SkyWatcher heritage 130p? i saw many suggested refractor is good for planets, i mostly target planets, moon and some star only, live in city.  need some advice. thanks. 
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.