Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jan 13, 2015 18:51:01 GMT
|
|
|
Post by davy on Jan 13, 2015 21:39:19 GMT
Fantastic pictures shevill..great looking at how things have progressed. .think I need to get your autograph..have you ever thought about writing an autobiography would make good reading. .davy
|
|
|
Post by Rick in NWArk on Jan 13, 2015 21:48:31 GMT
I agree, I think it would be great to read an autobiography! You've pioneered so much!
I've thought about planetary F/12+ Newtonians with large apertures that could handle a video camera... even a camera sitting at prime focus.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jan 14, 2015 5:44:59 GMT
I agree, I think it would be great to read an autobiography! You've pioneered so much! I've thought about planetary F/12+ Newtonian's with large apertures that could handle a video camera... even a camera sitting at prime focus.The 6" f/15 gave me a full siz Hi Rick,
The Moon filled a full 35mm frame with the 6" f/15 and planets were not bad either. The problem with a normal size 1/3", 1/2" video camera is that a long focus scope at f/15 would be such a small FOV, OK for planets but no good for any wide field larger objects. A 6" f/10 mirror can be left spherical which avoids the extra tedious work of figuring to a parabaloid, needed at less than f/10.
My 5.25" f/10 reflector without aluminising made a perfect solar white light telescope with 35mm film back in the 1960's. The sun filled the frame, gave me very short exposures and was beyond cutting edge at the time, with my home made full aperture 5"silvered solar filter. I published an article on that in one of the astronomical journals and it also got me accepted as a Fellow of the Royal Astronomical Society of London.
I am building a very interesting scope just for video at the moment and when finished & tested I will share the results and experience with the group. Just have to fit digital read out scales to my lathes and milling machine to work to the accuracy I need for this project, so a bit side tracked. This is my post surgery recovery period project, which is nothing strenuous .
Clear skies... Shevill
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jan 14, 2015 5:49:19 GMT
I agree, I think it would be great to read an autobiography! You've pioneered so much! I've thought about planetary F/12+ Newtonian's with large apertures that could handle a video camera... even a camera sitting at prime focus. Hi Rick,
Check these links out, a bit more historical info, astronomy is only one of many interests. But astronomy has been a parallel semi career to my medical background and the astronomy has offered me a professional entry with the 'big boys', since I retired so many years ago. My colleagues are all grey haired and in the same age group! sites.google.com/a/astrotasmania.com/www/homealso: sites.google.com/a/astrotasmania.com/www/aboutme
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jan 14, 2015 5:58:52 GMT
Fantastic pictures shevill..great looking at how things have progressed. .think I need to get your autograph..have you ever thought about writing an autobiography would make good reading. .davy Hi Davy,
Thank you all for the kind & generous comments, yes, I have had a very full & interesting life with many unique opportunities, which I have grasped with both hands. A good education at Leeds Medical School opened doors for me in Australia and I have never looked back. An autobiography would not be boring by any means, given the range of interest both professional and personal I have enjoyed and the people I have met from around the world.I have lived through a very interesting number of years to see so many new things come into use that people much younger take for granted.
Check this limk: picasaweb.google.com/109921669020426367250/HistoricalTelescopesSomeMediaArticlesVarious?authuser=0&feat=directlinkA selection/taste-feel free to browse: picasaweb.google.com/109921669020426367250Clear skies... Shevill
|
|
|
Post by johnno on Jan 14, 2015 14:22:39 GMT
Excellent pictures and reading once again Shevill,
when you was in the UK in your early days did you a have a observatory or did you have to haul it all out every time? just asking because some of your setups are quite large like the one's on the first row and it must of been a ball ache putting all together.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jan 14, 2015 18:45:07 GMT
Excellent pictures and reading once again Shevill, when you was in the UK in your early days did you a have a observatory or did you have to haul it all out every time? just asking because some of your setups are quite large like the one's on the first row and it must of been a ball ache putting all together. Hi Johnno,
No, it was all left outside and well covered up. In the winter months I had to dig a path through the snow and clear the snow off the scopes etc before I could use them. So, this was my first project when I came to Tasmania. Now of course with all the electronic and electrical gear, that I have, observatories are necessary.
Note* This is me second smaller observatory, The OctaDome, containing a very different setup, build images etc.: picasaweb.google.com/109921669020426367250/MathersOctaDomeScopes2006?authuser=0&feat=directlink Some images of my second observatory,The OctaDome, both currently operational. Clear Skies... Shevill
|
|
|
Post by Rick in NWArk on Jan 16, 2015 17:50:08 GMT
I agree, I think it would be great to read an autobiography! You've pioneered so much! I've thought about planetary F/12+ Newtonian's with large apertures that could handle a video camera... even a camera sitting at prime focus.The 6" f/15 gave me a full siz Hi Rick,
The Moon filled a full 35mm frame with the 6" f/15 and planets were not bad either. The problem with a normal size 1/3", 1/2" video camera is that a long focus scope at f/15 would be such a small FOV, OK for planets but no good for any wide field larger objects. A 6" f/10 mirror can be left spherical which avoids the extra tedious work of figuring to a parabaloid, needed at less than f/10.
My 5.25" f/10 reflector without aluminising made a perfect solar white light telescope with 35mm film back in the 1960's. The sun filled the frame, gave me very short exposures and was beyond cutting edge at the time, with my home made full aperture 5"silvered solar filter. I published an article on that in one of the astronomical journals and it also got me accepted as a Fellow of the Royal Astronomical Society of London.
I am building a very interesting scope just for video at the moment and when finished & tested I will share the results and experience with the group. Just have to fit digital read out scales to my lathes and milling machine to work to the accuracy I need for this project, so a bit side tracked. This is my post surgery recovery period project, which is nothing strenuous .
Clear skies... ShevillShevill, Yes, my primary driver here is for planetary, comets, or very small planetary nebulae. I want the aperture for details/contrast. I want the focal length for image scale/field of view. At the end of the day, however, I'm not sure what this would gain over an SCT > 10". --Rick
|
|
|
Post by Rick in NWArk on Jan 16, 2015 17:52:39 GMT
Excellent pictures and reading once again Shevill, when you was in the UK in your early days did you a have a observatory or did you have to haul it all out every time? just asking because some of your setups are quite large like the one's on the first row and it must of been a ball ache putting all together. Hi Johnno,
No, it was all left outside and well covered up. In the winter months I had to dig a path through the snow and clear the snow off the scopes etc before I could use them. So, this was my first project when I came to Tasmania. Now of course with all the electronic and electrical gear, that I have, observatories are necessary.
Note* This is me second smaller observatory, The OctaDome, containing a very different setup, build images etc.: picasaweb.google.com/109921669020426367250/MathersOctaDomeScopes2006?authuser=0&feat=directlink Some images of my second observatory,The OctaDome, both currently operational. Clear Skies... ShevillAre you limited in the Octodome to what you can see near the zenith?
|
|