Posts Made By: Ed York
June 18, 2004 08:13 PM
Forum:
Solar System Observing
July 7, 2004 12:49 AM
Forum:
Equipment Talk
July 9, 2004 06:49 PM
Forum:
Telescope Making
Secondary Mirror Selection - WWYD?Posted By Ed York |
Simple question, what would you do?
I used NEWT to determine the best size for my secondary. It says 2.05" Looking at premium secondaries, my options seem to be 1.83" and 2.14".
Performance characteristics:
1.83" - 5% Primary surface area obstruction, .3558 in (9 mm) 100% illumintaed, 1.168 in (29.7 mm) 75% illuminated. $120
2.14" - 7% Primary surface area obstruction, .7398 in (18.79 mm) 100% illumintaed, 1.517 in (38.5 mm) 75% illuminated. $180
Ed
I used NEWT to determine the best size for my secondary. It says 2.05" Looking at premium secondaries, my options seem to be 1.83" and 2.14".
Performance characteristics:
1.83" - 5% Primary surface area obstruction, .3558 in (9 mm) 100% illumintaed, 1.168 in (29.7 mm) 75% illuminated. $120
2.14" - 7% Primary surface area obstruction, .7398 in (18.79 mm) 100% illumintaed, 1.517 in (38.5 mm) 75% illuminated. $180
Ed
July 16, 2004 08:01 PM
Forum:
Equipment Talk
How else can I spend $Posted By Ed York |
OK, the primary's getting refigured, an upgrade to the secondary is in the mail, flocking paper is on order and I'm keeping my eye on AM for a 2 speed crayford focuser.
How else can I be spending money on my scope?
Ed
PS if you see an ad saying 8" Reflector $5000, invested $10,000, need money - wife threw me out, you will know why and that this is a great scope!
How else can I be spending money on my scope?
Ed
PS if you see an ad saying 8" Reflector $5000, invested $10,000, need money - wife threw me out, you will know why and that this is a great scope!
August 1, 2004 07:49 AM
Forum:
Solar System Observing
Blue MoonPosted By Ed York |
My wife gave me a digital camera recently - nothing fancy. I told her I saw a thread where a guy held up his digital camera to the EP and took some OK shots and I was going to try it. Her response was I wouldn't get a good shot often. When I asked how often she thought, she said once in a blue moon. As luck would have it......
Took it through a Meade 24 SWA with an Orion polarizing filter attached with a Cannon A300 digital camera held up to the EP. Not POD material, but not bad for the effort.
Ed
Took it through a Meade 24 SWA with an Orion polarizing filter attached with a Cannon A300 digital camera held up to the EP. Not POD material, but not bad for the effort.
Ed
August 6, 2004 05:32 PM
Forum:
Telescope Making
You look marvelous! Can I tell you that?Posted By Ed York |
I have my tubed reflector in pieces and will strip down the rest of the way to flock. The big question, what color do I paint the tube (currently Orion gun metal gray).
Isn't there a rule that you can't see good 'till you look good?
Ed
Isn't there a rule that you can't see good 'till you look good?
Ed
August 14, 2004 03:50 AM
Forum:
Telescope Making
Flockling ProblemPosted By Ed York |
I flocked my tube today (where else could I say this and not get slapped).
I used protostar flocking paper. It sticks great to itself and to me, but doesn't stick very well to the tube. Protostar recommends cutting in long stips (about 1-2") and running the length of the tube. It's these long seams that keep rolling up.
I pressed, I rubbed, I ran in a tool with a smooth, curved edge & rubbed it around, I used a rolling pin. Still keeps pulling up. I said a little prayer. I cursed a bit. I even did a little rain dance - couldn't hurt and it burned off some of that frustration energy.
What else should I try?
The good news, it's hard to see down the tube to work because this stuff just soaks up the light. You almost have to aim the tube directly at a light source.
Ed
I used protostar flocking paper. It sticks great to itself and to me, but doesn't stick very well to the tube. Protostar recommends cutting in long stips (about 1-2") and running the length of the tube. It's these long seams that keep rolling up.
I pressed, I rubbed, I ran in a tool with a smooth, curved edge & rubbed it around, I used a rolling pin. Still keeps pulling up. I said a little prayer. I cursed a bit. I even did a little rain dance - couldn't hurt and it burned off some of that frustration energy.
What else should I try?
The good news, it's hard to see down the tube to work because this stuff just soaks up the light. You almost have to aim the tube directly at a light source.
Ed
August 15, 2004 12:55 AM
Forum:
Telescope Making
Secondary - WOW!Posted By Ed York |
As I am putting my reflector back together, I am gluing my secondary on. I had the old one (Orion 2.25 ?? pv wave) and the new one Antares 2.14 1/25 pv wave fused silica next to each other to humor myself. Like I would be able to see the difference. The laughing stopped when I looked down. The new secondary is like being in a bright room and the old in a room with a lamp in the corner with a 40w bulb. I thought it was the angle so I switched hands. Same thing. WOW!!!!!!!
I can't wait for my primary to get back!
According to Rick's Wild Card Article 3.1, Strehl is like adding aperture (between the lines - efficiency thing). I'm spending the money to add light (effective aperture) without adding the weight - my back is doing a jig - or killing portability!!!
Ed
I can't wait for my primary to get back!
According to Rick's Wild Card Article 3.1, Strehl is like adding aperture (between the lines - efficiency thing). I'm spending the money to add light (effective aperture) without adding the weight - my back is doing a jig - or killing portability!!!
Ed
August 15, 2004 05:56 AM
Forum:
Telescope Making
Scope Upgrade - 1 Yard LinePosted By Ed York |
This scope started it's life as an Orion SVP 8" f4.9 Reflector.
Upgraded Secondary - Antares 1/25th wave fused silica
Moonlite Dual Rate Crayford (CR2) for Planetary & Photos
Flocked - Protostar flocking paper
New Paint (cleaner look - Tube: Dover White and Trim: Liveable Green)
Ultra Flat Black on all internals
Stainless Screws on outside (replaced black)
9x50 Finder
Only thing still working- Primary being refigured by Mark Harry.
Upgrade Philosophy: I can get the same or better view with premium optics and tweaking then with a heavier, harder to transport, harder to store mass produced bigger scope. Same View Better Back (SVBB)
Ed
Upgraded Secondary - Antares 1/25th wave fused silica
Moonlite Dual Rate Crayford (CR2) for Planetary & Photos
Flocked - Protostar flocking paper
New Paint (cleaner look - Tube: Dover White and Trim: Liveable Green)
Ultra Flat Black on all internals
Stainless Screws on outside (replaced black)
9x50 Finder
Only thing still working- Primary being refigured by Mark Harry.
Upgrade Philosophy: I can get the same or better view with premium optics and tweaking then with a heavier, harder to transport, harder to store mass produced bigger scope. Same View Better Back (SVBB)
Ed
August 16, 2004 09:07 PM
Forum:
Telescope Making
Flocked Secondary?Posted By Ed York |
If everything else is flocked, should I also flock the back of my secondary - the part that overhangs the holder?
Ed
Ed
Funding Member
