New 22″ f/3.8 Dobsonian telescope by SDM Telescopes  Page link to Infinity build here.





Previous  Telescopes

Meade DS-16 Equatorial Newtonian Telescope

My recent telescope is the Meade DS-16 Newtonian Reflector on its German Equatorial pier mount. The DS-16 has a 16″ parabolic mirror of focal ratio f/4.5. The DS-16 has both RA and DEC drives but are not in use due to the heavy tube. The DS-16 has a 2″ focuser (all metal), a 1.25″ to 2″ eyepiece adapter, and a 50mm finder. The DS-16 weighs in at around 240 lbs. Although the DS-16 also has  large metal setting circles to aid in manually finding objects I do not use these as all my objects are found by memory and star hopping.

From the picture you will notice I have added rotating rings to the telescope. When I first used the scope the eyepiece was in a fixed position which meant I lost half of my variable star fields. The whole tube and eyepiece now rotates 360 degrees.

12″ Homemade Dobsonian Telescope.

Prior to the DS-16 Meade I used a 12″ Dobsonian telescope. This type of telescope did not fit into the  observatory  so I placed the mirror into a powder coated tube lined with black velvet. I also made a higher rocker box, shifted the pivot point forward and added extra weights to the front to balance the telescope. This setup served me well with over 100,000 observations being made with this scope. One notable detection made with this telescope was the black hole V4641 Sgr.

This observation diverted the Rossi X-ray Timing Explorer (RXTE) satellite to observe this star.


Tasco Telescope 59T

tasco telescope

5 Responses to Telescope

  1. David Waye says:


    thanks for your response


  2. David Waye says:

    Which filters do you recommend for a basic amateur backyard astronomer’s kit? For someone who looks at the Moon, the planets and nebulae.


    • Hi David,

      To be honest I don’t use filters for my visual variable star work. I need as
      many light photons possible to detect faint stars. Filters can help with
      contrast and light pollution but any filter blocks light to perform it’s job so
      you get fewer photons and dimmer objects. I have tried filters but wasn’t
      overly impressed with them. As well as light pollution you also have
      transparency and atmospheric turbulence to consider. Filters can be
      expensive but they won’t improve the objects under these conditions.
      Although a good neutral density filter for the Moon would be handy
      when bright. Good quality optics are also important to see better detail
      in objects rather than relying on filters. Learning good observational skills
      are important also when using any telescope such as averted vision to
      detect faint detail.
      I would definitely look through other telescopes with filters before buying
      a set.



  3. John Collins says:

    Would you happen to have specs on the Meade DS16 counter weights.


    • John, the DS16 counter weights come as one 25lb weight (195mm x 50mm) and one 42lb weight (195mm x 80mm). They fit on a 1.5″ shaft and are held in place by a counter sunk bolt tightened by a hex-head allen key.


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