Louis, ... There are many ways of doing this. One simple method is to cut out a paper circle the diameter of your mirror. Fold it in half on two different...
15487
louisdelsesto
Apr 24, 2006 6:21 pm
I made a 8 inch f5.7 mirror and i have build the ota now i just need to put a dot/small circle on my mirror. How the heck do i do this and be accurate ? please...
15486
lou
louisdelsesto
Apr 23, 2006 7:41 am
Adjustment of the mirror is not that hard,after you do it a few times it becomes second nature,dont let that scare you from a larger aperture telescope..The...
15485
Michelle Stone
plettstone
Apr 23, 2006 1:17 am
Pascal, Yes, every time you set up a newt, you should check your collimation. But it is a very easy thing to do once you get used to it. So don't make your...
15484
rbbrchts
Apr 22, 2006 11:15 pm
hello, is there someone who have experience with the new truss dobsons from meade i am looking out to buy me a dobson, i already have a tal200k my question is...
15483
John Marshall
jmarshallstar
Apr 22, 2006 5:34 am
I have one of these OCA's and it works great. I have the 1.3x model and it does NOT protrude into the light path. My Burgess binoviewers have a very short...
15482
John Mahony
jmmahony
Apr 22, 2006 4:58 am
... I didn't damn the product. Using a nosepiece barlow in this manner is common for reaching focus with binoviewers when used in Newtonians and refractors. ...
15481
socratesmg
Apr 21, 2006 8:57 pm
Dear John, Although I'm sure you meant well in trying to set the record straight, you may want to get a few more facts before damning an product/claim as found...
15480
John Mahony
jmmahony
Apr 21, 2006 2:26 am
... It _is_ a barlow. It will stretch out the end of the light cone, but also increase the effective focal length. And while I hate to detract from your...
15479
vid1900
Apr 21, 2006 1:13 am
Sounds like a nice scope! Don't stake your life on it being done by August, from some of the posts I've been reading, Jims been really busy: ...
15478
Richard Carner
rmcarner
Apr 21, 2006 12:08 am
... Snip R. Carner entirely.. ... Understood. ... Have not 'gone there' yet. Perhaps soon I will spring for Jim's autocollimator. The one I have provides ...
15477
Vic Menard
vmpte2001
Apr 20, 2006 10:26 pm
... If you plan to use a Paracorr (focuser axis 6X more critical) and hope to use the sight tube to set the focuser axis (adjust the tilt of the diagonal to...
15476
Richard Carner
rmcarner
Apr 20, 2006 9:44 pm
... Keep thinking about the a sight tube and then I would suggest purchasing one somewhere..Vic Menard indicates that not all sight tubes are equal. Suggesting...
15475
socratesmg
Apr 20, 2006 9:34 pm
I have some GREAT news on increasing our back focus with big dobs! After naively initiating a maelstrom of comment and opinion on the issue of shortening truss...
15474
Vic Menard
vmpte2001
Apr 20, 2006 9:05 pm
... Well, Jack's 18-NSS is f/4.2, so I'm assuming he'll be using a Paracor and for best performance, collimation will be critical. A Cheshire or Barlowed laser...
15473
Richard Carner
rmcarner
Apr 20, 2006 9:04 pm
... Keep thinking about the a sight tube and then I would suggest purchasing one somewhere..Vic Menard indicates that not all sight tubes are equal. Suggesting...
15472
Chuck M.
turandot0
Apr 20, 2006 6:52 pm
Yes - I'd like to hear answers for suggested collimators as well. I'm expecting a 14" big dob in the next couple of months, hopefully. So, after lurking,...
15471
Richard Carner
rmcarner
Apr 20, 2006 2:23 pm
... Jack, you might also want to consider adding in between steps on your ladder. I have had a 20"f/5 for 10 years. It seemed that no matter where I was in the...
15470
C. Starks
cstarsnc
Apr 20, 2006 9:09 am
Hi Mike, I once had a Magellan I. I sold it a number of years ago. Sky Commander and Argo Navis have the feature in which you can change the sense of the...
15469
Michelle Stone
plettstone
Apr 20, 2006 4:52 am
Jack, You will appreciate the large apertuure. For a step ladder, most of the people I observe with, use the Cosco step ladders. They are available at Home...
15468
Jack Estes
jackestes
Apr 20, 2006 3:32 am
Okay gentlemen, I'm no longer just lurking. Tomorrow I'll be sending my 1/2 deposit check to Jim Nadeau for my new NSS. (www.nightskyscopes.com) I'm counting...
15467
Mike
bubba30856
Apr 19, 2006 11:21 pm
Yep...Changing the sign on the el encoder reversed the count. I'll try another alignment and see how it goes. Hopefuly that will do it. Thanks for the help...
15466
John Mahony
jmmahony
Apr 19, 2006 7:31 pm
Just change the sign of the alt (el) encoder ratio. Easier than changing the hardware. -John ... __________________________________________________ Do You...
15465
Bernie
gmc622003
Apr 19, 2006 2:38 pm
I don't believe there is. You can mount the encoder on either side on your box. You can change the direction of the encoder to a + or - for it to run in the...
15464
gubbenimanen
Apr 19, 2006 1:08 pm
Isn't there a parameter for reverse mounting of the encoders? For example the NGC-Max you can change the sign of the encoder's resolution. Roger Persson...
15463
Mike
bubba30856
Apr 19, 2006 10:04 am
Hi John, After much searching I think I've found the problem. I bought the Magellan used with no installation instructions and it looks like I have the El...
15462
Vic Menard
vmpte2001
Apr 18, 2006 11:38 pm
... This is probably going to sound strange--but when I use the sight tube to align the diagonal, the various mechanisms that control the alignment seem more ...
15461
Richard Carner
rmcarner
Apr 18, 2006 10:12 pm
... more intuitive. You'll have to forgive me. When you use the word intuitive (aside from my nominal understanding of the meaning of the word), can you get...
15460
Vic Menard
vmpte2001
Apr 18, 2006 8:35 pm
... Dick, Although the holographic laser is visually impressive, I personally find a well made sight tube more intuitive. I routinely use the holographic...
15459
Richard Carner
rmcarner
Apr 18, 2006 5:32 pm
... Of the two - sight tube & holographic laser - do you have more confidence (or a working preference) in one as opposed to another? The reason I ask, is that...
