Support Astromart! | Log In | Help
Astronomy NewsTelescope ClassifiedsTelescope AuctionsTelescope Articles & ArticlesTelescope Articles & ReviewsTelescope and Astronomy ForumsAstronomy Events Calendar
View Categories
Browse By Location
Place A New Ad
Display Preferences
Search Classifieds

User Name:


Save Login
New to Astromart?
Register an account...

Terms of Service
Privacy Policy
Help & FAQ
Astronomy Links
User Profiles
Top Users List
RSS Feeds

Home > Classifieds > Astromart Classifieds > Telescope - Reflectors > Classified #282540

For Sale: 6" F5 Dob: Mark Harry, Protostar, Feather Touch

Please Log In to view the details for this classified ad.
Don't have an Astromart account? Click here to create one

This combination is not your typical run of the mill short tube Newtonian. The scope has a 6” F5 Mark Harry mirror of very high quality. After assembling this scope I found a local deal on an MN-61 Mak / Newt on the shown dob mount. I decided to have a shootout, and keep the best one. The MN-61 is long gone. The Newt showed a little better detail on Mars, and deep sky objects were slightly brighter. The MN-61 did seem to do a better job on double stars. I was pulling for the MN-61 because of the mount. The mount works with the Newt, but the scope is a little wide. The photos show the friction stops of Teflon and aluminum. I like this Newt so much I had Ken of Ken’s Rings make the tube rings as narrow as possible, so I could use this scope on the dob mount. The stops will have to be re-engineered to get the scope to zenith. I was told the dob mount won an award at Stellefane. The ALT uses roller bearings.

The mirror is .97 Strehl, which is pretty good for a 6” F5. The are a few smudges on the mirror, along with the usual dust, and dew spots. The mirror is mounted in a Starsplitter lightweight aluminum cell. I have tried twice to secure the mirror with silicone, but each time there is a low point which requires one collimation screw out, and two in. Instead of using springs the cell uses rubber pads for tension. There is not much collimation travel, but enough to get it collimated. I have since secured some University Optics mirror cell clips. I had to enlarge the holes some on the clips to get them to work, but they work fine. The silicone is still on the back of the mirror. I recommend removal of the silicone, and re-gluing, or just using the clips.

The secondary is a 1.52” Protostar Quartz mirror on a 3 vane spider, also Protostar. The focuser is a Feathertouch. I have recently ordered a new Feathertouch 2” to 1.25” adapter. It is not here yet, but I will send it when it arrives. I am presently using an AP reducer, but need it for my new scope. I just bought the tube from Starsplitter. It is not flocked, but I do have some Protostar Flocking Paper, approximately 15” x 15” & 10” x 20” I will include. The finder is a Meade 8 x 50, which was white, but I painted black. There are minor scuffs in the paint. The finder rings are “Scope Stuff” rings and work well. The rings are hinged rings from Ken’s Rings 7.5” ID one month old. I will include a Cat's Eye Collimation eyepiece along with a short Techtron Autocollimator, and an Astrosystems "LightPipe". The total cost for this setup; mirror $500.00, secondary and spider $220, focuser with adapter, and curved base $350.00, mirror cell $25, tube, $25, finder and bracket, $50, dob mount we will say $50, tube rings $150.00. The collimation tools are over $100.00 The total is $1470.00. I will sell the scope for $750 plus actual shipping cost. I prefer not to ship the dob mount, but I will at actual packing and shipping charges.

I have owned a few scopes in my time, but this may be my favorite. The double cluster with a 22 Nagler is a sight to see. I mentioned any potential problems. My price is firm. I will not be broken hearted if this does not sell. It just seems a waste to keep this, and a TEC 140. Call me at (910)352-2802 with any questions.




Back to Listing

All times are in (GMT-8:00) Pacific Standard Time Zone  
Astronomy News | Telecope Classifieds | Telescope Auctions | Telescope Reviews | Telescopes | Telescope and Astronomy Forums | My Account | Help | RSS