Astrophotography forum > Reflectors Telescopes Forum

Does anyone today make an 8" or 10" dob with right-side focuser and large bearin

(1/1)

nepaletha:
Asking partly out of nostalgia; partially thinking about scopes which got away.

I have a wonderful 7" Starmaster dob, which has a tube cradle, large side bearings, and its focuser on the *right side (as you look in the back).  It works superbly-- it is simply a matter of placing the scope onto the mount; nothing to be on the lookout for; just "plop-and-drop" into position.  It swiftly and moves into position on the cutouts of the top sides of the rocker box and you are good to go!

The focuser location is particularly good for me as I'm left-eye dominant.

Used to own -- and remember well -- Discovery dobs which had the right-side focuser, too, but almost everything I see promoted nowadays has a *abandoned*-side focuser, along with small bearings (which Discovery also suffered from.  Though strategically placed felt solved that problem), and the dobs most have things to fiddle with just to get the scope in place -- pressure bolts, washers to thread, etc., and items to beware of -- hitting encoders, tension bolts askew obstructing the lowering of the tube in place, etc..

Wonder why the tube cradle has seemingly gone the way of the Dodo... it is great for tweaking the rotation along with the scope's equilibrium, though that is rarely needed.   The tube cradle and large bearings imply there is a large sweet spot for your tube's place and there is not a need for rebalancing even with 3x Barlow, large eyepiececamera and camera at the focuser!  Focusing is rock solid, too.

Also, wonder why makers switched the focusers to the left side!  While a 10" dob looks enticing, not sure if I could purchase a present dob without large bearings and a right-side focuser!

Oh, well!  Next, I will start reminiscing about when we used to walk five miles to school through two feet of snow; the Great Red Spot was actually RED; milk was delivered fresh daily in returnable bottles, a 6" scope was believed a LARGE one; Norton's Star Atlas was the kitty's' meow (and still is great to check in); and Edmund Scientific made a great adjustable Barlow that you simply pushed the lens up or down into its tube to change the magnification!

Navigation

[0] Message Index

Go to full version