Focuser travelPosted By Paul Kammueller |
In my experience, the amount of focuser travel you need is always about 1/8" more than what you have.
Posts Made By: Paul Kammueller
March 9, 2005 06:52 PM
Forum:
Equipment Talk
March 10, 2005 12:45 PM
Forum:
Equipment Talk
Too lazy???Posted By Paul Kammueller |
I would say if the moon is out, or if there is some other ambient light source nearby, or it's getting to be twilight, the shroud is very important.
When there is no ambient light source, and no moon, I'd probably skip it.
When there is no ambient light source, and no moon, I'd probably skip it.
March 10, 2005 03:26 PM
Forum:
Beginning Astronomy?
photo vs. visual questionPosted By Paul Kammueller |
In addition to Harold's notes on eye spectrum sensitivity, I believe if you do a short enough exposure the nebula still comes out grey to green. Colors are hard to detect in low light (look around a dark room and see how grey your furniture suddenly looks). Green is just the color that jumps out first, after grey which is no color. To expose the nebula enough to bring out the reds, in effect you overexpose the green areas until they're a bright yellow or white.
March 10, 2005 06:23 PM
Forum:
Equipment Talk
Under 30 club?Posted By Paul Kammueller |
You guys realize that on Saturn you guys would all be less than 1 year old? 
-Paul (1.25 Saturnian years old)
-Paul (1.25 Saturnian years old)
March 16, 2005 04:22 PM
Forum:
Religion
Da Vinci CodePosted By Paul Kammueller |
It's a work of fiction. It's supposed to be full of cheap lies. 8)
Anyone who writes heresy in the context of a fictional novel takes the risk of being publicly denounced, if not worse. Salman Rushdie did basically the same thing with "The Satanic Verses", with predictable results.
Anyone who writes heresy in the context of a fictional novel takes the risk of being publicly denounced, if not worse. Salman Rushdie did basically the same thing with "The Satanic Verses", with predictable results.
March 16, 2005 10:08 PM
Forum:
After Dark
earthshine moonPosted By Paul Kammueller |
Wow. This image has a very hypnotic quality about it. Thanks for sharing
March 21, 2005 07:15 PM
Forum:
Equipment Talk
Curved SpidersPosted By Paul Kammueller |
Unfortunately since going to curved vanes is usually a "before & after" comparison, rather than a side-by-side blind test, it's hard to objectively say -- when I went to curved vanes on my 10" the spikes disappeared and things look 'contrasty' but not being able to do a side-by-side I cannot honestly say whether actual planetary detail was influenced, one way or the other.
March 22, 2005 10:06 PM
Forum:
CCD Imaging and Processing/Solar System
Gassendi--hires!Posted By Paul Kammueller |
Looks like it was taken from an Apollo flight. 8O Amazing.
March 25, 2005 02:29 PM
Forum:
Politics
A (cold) opinion on the Schiavo issuePosted By Paul Kammueller |
You've hit upon something I've been thinking but wasn't posting because it sounded, as you say, cold. But the truth is her parents are in effect using her as a sort of living monument to the daughter they remember. What they are doing in the courts is not for her but for them.
If one believes in the concept of an immortal soul then yes the best they are doing is preventing her from going to her reward, keeping her imprisoned in a useless body and brain to live out an existence that is as close to hell as anything I can imagine, just so they can have the personal comfort of being able to see her.
If one does not believe in the concept of an immortal soul then the best they are doing us hanging on to the remaining flesh of a person who died years ago.
If one believes in the concept of an immortal soul then yes the best they are doing is preventing her from going to her reward, keeping her imprisoned in a useless body and brain to live out an existence that is as close to hell as anything I can imagine, just so they can have the personal comfort of being able to see her.
If one does not believe in the concept of an immortal soul then the best they are doing us hanging on to the remaining flesh of a person who died years ago.
March 26, 2005 01:56 PM
Forum:
Eyepieces
What good is 60° FOV if it is not clear?Posted By Paul Kammueller |
I would echo what some others have said regarding the increased field making things easier to find.
Also I would point out that since your eye only makes out the most detail in its own direct center of the field of its view, really your real diffraction limited field is quite narrow even if the image is sharp to the edge.
It really depends how much time you spend actually looking AT the edge of the field. This will depend on what magnifications you're typically using, whether your scope tracks, etc. If your objects tend to be centered, and your eyes tend to be centered in the field, then the edge of the eyepiece field will coincide with the edge of your eyeball's field and be thus less detailed no matter how sharp the eyepiece is. In this case the edge sharpness is superfluous since your eye is not exploiting it.
Also I would point out that since your eye only makes out the most detail in its own direct center of the field of its view, really your real diffraction limited field is quite narrow even if the image is sharp to the edge.
It really depends how much time you spend actually looking AT the edge of the field. This will depend on what magnifications you're typically using, whether your scope tracks, etc. If your objects tend to be centered, and your eyes tend to be centered in the field, then the edge of the eyepiece field will coincide with the edge of your eyeball's field and be thus less detailed no matter how sharp the eyepiece is. In this case the edge sharpness is superfluous since your eye is not exploiting it.
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