Can someone send me the ordering address for the the Green laser special please. Thanks Boyd McNeil utah-astronomy-request@mailman.xmission.com wrote:
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Today's Topics:
1. Re: Green laser special - $35 (Michael Carnes) 2. Re: was Digital camera now cheap epson prints (Michael Carnes) 3. Re: Digital camera (Patrick Wiggins) 4. Re: Digital camera (Rob Ratkowski Photography) 5. RE: Green laser special - $35 (Chuck Hards) 6. Re: Digital camera (Chuck Hards) 7. RE: Re: Digital camera (Don J. Colton) 8. RE: Re: Digital camera (Chuck Hards)
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Message: 1 Date: Mon, 18 Dec 2006 19:39:56 -0700 From: Michael Carnes <MichaelCarnes@earthlink.net> Subject: Re: [Utah-astronomy] Green laser special - $35 To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Message-ID: <90A3A117-D3D6-4D24-8CC6-5B361690E228@earthlink.net> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
Just took the pointer outside and shot through a few sucker holes. I think Rich is correct about the beam spread. If you illuminate a nearby surface, I think every rod and cone on that quadrant of the retina gets lit up. Outside, the beam appears evenly narrow all the way up. Again, I can't do a side-by-side with another pointer, but this one doesn't feel any different from any of the others I've seen. I believe I'll be perfectly happy with it. Of course tonight, there are quite a few ice crystals in the air, so the beam will be more quickly absorbed. But that gives a chance to see that there's no visible divergence. And all of those ice crystals are really pretty when they go through the beam.
On Dec 18, 2006, at 4:51 PM, Richard Tenney wrote:
That sounds a bit much for spread, but then again, it's so dang bright that your eye may just think it's an inch across.
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Message: 2 Date: Mon, 18 Dec 2006 19:45:00 -0700 From: Michael Carnes <MichaelCarnes@earthlink.net> Subject: Re: [Utah-astronomy] was Digital camera now cheap epson prints To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Message-ID: <41E78B36-1FCD-41F6-8E0F-A4AD5D687A49@earthlink.net> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
That's quite interesting Jo. Hadn't heard of that approach before. A few printers back, I would refill cartridges by hand (it eventually washes out of your skin). I did try some 3rd-party cartridges for my 785EPX, but was never satisfied with the color. This system looks a bit more flexible.
MC
On Dec 18, 2006, at 5:54 PM, bsi@xmission.com wrote:
I can't comment on the photography, but I was surprised that no one here suggested the continuous flow system for an Epson inkjet, in order to reduce printing costs. I went to this system for the ALCON 2002 printing, and have continued to use it. They have improved the models, and you can use archival inks or a range of inks specialized for other purposes. This s the link. http:// www.inksupply.com/cobra.cfm When I bought it, they had an awkward software based method of resetting the chips on the ink cartridges, but they have come up with a much slicker method now, that I would buy if I were not so cheap. I bought the empty system and then chose the ink I wanted to use. The biggest problem I had was when I did not use the printer for extended periods of time, and then I had to waste a lot of ink clearing the heads. I see they have a program now that will automatically print a test pattern once a day, to prevent that problem. For those of you who do still print your own, this device will pay for itself quickly, and then save you huge amounts over time.
Jo
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Message: 3 Date: Mon, 18 Dec 2006 20:01:00 -0700 From: Patrick Wiggins <paw@wirelessbeehive.com> Subject: [Utah-astronomy] Re: Digital camera To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Message-ID: <5AE5A960-EE84-467D-A35B-4FD413F90FF0@wirelessbeehive.com> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
You're going digital and I'm still trying to figure out how to shoot and process Daguerreotypes...
I really like my D-70. As much as I hate to admit it (with one foot still in the 20th century) I really like digital. Have only used it for ground shots so far and those take little (and usually no) processing.
And putting them on the hard drive is just a matter of plugging a cable from the back of the computer into the camera and a file containing all of the images magically appears on the desktop. Then click, drag, drop and that's it.
pw
p.s. Everyone think warm thoughts. I'm about to open my observatory and chase a few asteroids.
On 17 Dec 2006, at 21:47, Chuck Hards wrote:
After 35 years of avid emulsion-based photography, I'm about to take a serious digital plunge, something better than Webcam & camera-phone resolution. Trolling for suggestions, looking for a commercial camera that fills a similar niche to the classic 35mm SLR that I am used to. I want to use it for some astro-photography as well as terrestrial, family snapshots, etc. I suspect there will be some good deals after Christmas. I don't want to break the bank, can we keep it under say, $700?
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Message: 4 Date: Mon, 18 Dec 2006 17:07:05 -1000 From: Rob Ratkowski Photography <ratkwski@hawaii.rr.com> Subject: [Utah-astronomy] Re: Digital camera To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Message-ID: <a0624080cc1ad077afd1b@[192.168.1.101]> Content-Type: text/plain; charset="iso-8859-1" ; format="flowed"
One thing I highly suggest is a USB 2.0 card reader for memory cards. The readers download way faster and easier than from a camera. Just my 2¢ again
aloha Rob
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Message: 5 Date: Mon, 18 Dec 2006 22:12:05 -0800 (PST) From: Chuck Hards <chuckhards@yahoo.com> Subject: RE: [Utah-astronomy] Green laser special - $35 To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Message-ID: <20061219061205.79572.qmail@web30407.mail.mud.yahoo.com> Content-Type: text/plain; charset=iso-8859-1
Couple of points on green lasers.
There are not that many diode manufacturers. Many different pointer brands actually use the same model diode. That said, each diode manufacturer has several models of differing output power and beam divergence. The pricier the diode, usually, the better the beam quality and brightness.
My Beta pointer has a tight, round beam. My non-optimised laser has a pretty tight beam as well but is less than half as bright, to the eye.
If your dot displays funky artifacts, try blowing out the lens with canned air (or compressed air from a non-oil-lubricated compressor). Often it's just lint or dust on the exit window that cause diffraction aritfacts. You can remove stubborn dirt with a Q-tip dampened with lens cleaner (not sopping wet, just damp). Follow-up with a clean, dry Q-tip.
Changing brightness is usually an indicator of a poor power connection. Clean the battery terminals, or clean the switch contacts. The switch contacts themselves may be just contacting each other poorly. If fixing connectivity problems doesn't cure the variable brightness, the diode may be damaged.
One of my early laser experiments was an off-shoot of the visibility test Ann House and I performed. I mounted the laser on the telescope and aligned it with the center of the field of a high-powered reticle eyepiece. By just aiming the crosshairs on the target, the laser was aimed as well. But a benefit is that you can attach a linear scale on a distant post and then see the dot size through the eyepiece without having to leave the laser on and walk down to the target. Leaving a green laser diode on for an extended period can damage it permanently- it may stop functioning or become permanently dim. Especially the 5mw optimised units, use them intermittently only.
If the beam is too bright to accurately judge the diameter, a ND filter attenuates the beam sufficiently.
Anybody want to compare dot size along with beam visibility?
--- Seth Jarvis <SJarvis@slco.org> wrote:
I own two other green lasers, and this has the tightest beam of the lot. No funny blotches around the perimeter of the (killer bright) green dot and the beam seems rock steady. One of my other two green lasers' beam jumps around quite noticeably in brightness, and its sibling has a steady beam but is not especially bright.
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Message: 6 Date: Tue, 19 Dec 2006 15:17:01 -0800 (PST) From: Chuck Hards <chuckhards@yahoo.com> Subject: [Utah-astronomy] Re: Digital camera To: Utah-Astro <utah-astronomy@mailman.xmission.com> Message-ID: <20061219231701.10373.qmail@web30401.mail.mud.yahoo.com> Content-Type: text/plain; charset=iso-8859-1
Thanks to Paul Ricketts of the UofU Astronomy club for calling this to my attention:
http://www.canon.co.jp/Imaging/astro/index-e.html
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Message: 7 Date: Tue, 19 Dec 2006 16:24:48 -0700 From: "Don J. Colton" <djcolton@piol.com> Subject: RE: [Utah-astronomy] Re: Digital camera To: "'Utah Astronomy'" <utah-astronomy@mailman.xmission.com> Message-ID: <000a01c723c4$e0a96af0$d41e5742@DON3> Content-Type: text/plain; charset="us-ascii"
The EOS 20Da is a great camera but it is no longer available. It was designed for astrophotography and only 4000 were made. You can still get the 20D but it is lacking many of the best features.
-----Original Message----- From: utah-astronomy-bounces+djcolton=piol.com@mailman.xmission.com [mailto:utah-astronomy-bounces+djcolton=piol.com@mailman.xmission.com] On Behalf Of Chuck Hards Sent: Tuesday, December 19, 2006 4:17 PM To: Utah-Astro Subject: [Utah-astronomy] Re: Digital camera
Thanks to Paul Ricketts of the UofU Astronomy club for calling this to my attention:
http://www.canon.co.jp/Imaging/astro/index-e.html
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Message: 8 Date: Tue, 19 Dec 2006 16:16:32 -0800 (PST) From: Chuck Hards <chuckhards@yahoo.com> Subject: RE: [Utah-astronomy] Re: Digital camera To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Message-ID: <951660.72649.qm@web30414.mail.mud.yahoo.com> Content-Type: text/plain; charset=iso-8859-1
The content of the site is pretty generic. The camera in the photo isn't specifically referenced on any of the associated pages I've read so-far, but I haven't read all of them yet.
It appears to be mostly just good, basic information on digital astro-imaging for the beginner.
--- "Don J. Colton" <djcolton@piol.com> wrote:
The EOS 20Da is a great camera but it is no longer available.
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End of Utah-Astronomy Digest, Vol 46, Issue 28 **********************************************