I'll second (third?) these statements, with modification. You can see a 50% increase in light every time - 8">10" or 10">12.5" - but you won't be impressed. No...
Richard if you have a pic of your scope with whatever setup you plan on using for tracking and your imaging device, it would be nice to see it. Maybe in the...
It's good to see that I'm not alone, and that so many other NAA members have aperture fever. Matthew, so when is the 25 inch order going to be placed?? ... ...
There are some designs out there that allow you to see an object at any altitude from the same height position on the ground. This would make it much easier...
hi lowell this is the model of the telescope for handicapt persons. guido [Non-text portions of this message have been removed]...
guido gaethofs
guido.gaethofs@...
May 5, 2004 6:44 am
9928
hi lowell not match the focuser stands in the midle of the altitude bearings.(dobson)so that the handicapt person can observe in his wheelchair. greetings...
guido gaethofs
guido.gaethofs@...
May 5, 2004 6:46 am
9929
hi all where can i find spherical mirrors. guido [Non-text portions of this message have been removed]...
guido gaethofs
guido.gaethofs@...
May 5, 2004 1:46 pm
9930
Guido: What size and focal length? For spherical mirrors up to 8" diameter Edmund Industrial Optics is a good source. You might also try searching on eBay. ...
hi james i want mirrors from 10 to 20 inch with focallenghts between F 6 for 12 to 20 inch and 10 inch F8. greetings guido ... From: "James Mulherin"...
guido gaethofs
guido.gaethofs@...
May 5, 2004 5:14 pm
9932
The ASCOM driver for ServoCAT, developed by Peter Eschman, is now ready for download. The driver date is 04/10/04, and the download zip file is dated...
Guido: What's you application? Do you plan to parabolize the mirrors? I'll check my surplus shelf to see if I have anything in the range you describe. James ...
Discovery sells f/10 spherical mirrors, the one I bought is 4.25 inches (108mm). It's actually for sale but I've been too lazy to list it on astromart. ...
... wheelchair. I saw a 27" mirror being ground at Stellafane a couple of years ago that was to be put into a scope of similar design. It was to be a very...
hi james im gonna flex the mirrors. greetings guido ... From: "James Mulherin" <jcmulherin@...> To: <bigdob@yahoogroups.com> Sent: Thursday,...
guido gaethofs
guido.gaethofs@...
May 6, 2004 7:16 am
9937
I have been experimenting with different scopes over the last year to determine if I can settle on one as my "main" scope. I live in suburban Detroit where...
... I think that in the 10" either F5 or even F6 would be nice. I've used a 12.5" F5 for several years with a mirror from Steve Swayze and had excellent ...
Which is the best place to mount fans? Many scopes have rear mounted fans, but others use front mounted fans that are specifically aimed at removing the...
I think it's best to use both (I do), because the mirror will reach ambient temperature faster. And with the mirror at ambient temperature, there is no ...
... Dear Richard, The better two options are rear fans verses front AND rear fans. To my mind, there are only a few cases where front fans by themselves make...
... mounted ... The June 2004 issue of _Sky & Telescope_ includes the second article in Bryan Greer's two-part series on this very topic. Greer's test results...
Yes, Thanks, I almost forgot about that article. The last one inspired me to built a fan/battery holder for the back of my 10" OPT StarHunter (GS) dob, using...
Hello everyone: I am building a cell for a 15" X 2" F5 mirror, currently being refigured by Steve Swayze. I had already built a 9-point flotation cell as per ...
Joe, ... You should take a look at Mark Holm's collection of mirror cell designs. Kreige's cell designs are very good, but Plop can optimize them further. ...
Joe, You could probably PLOPtimize a six-point cell that will perform a little better on paper, but I doubt you'd notice much difference at the eyepiece on...
... Thanks steve & Ross: I guess i'm just wondering at which point in thickness ratio traditional 9 point flotation yields 1/8 lambda or better ar the ...
Hi, I was wondering what the big dob community is using for diagonal mirror dust covers these days on truss tube style dobs. I have seen the blue Chevas Regal...
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