Luckily, it warmed up slightly on Jan. 26 for our ATM session! Charlie, Chuck, Jay, Jeff and Josh all attended and made it a great session. No mirror work went on, probably because it was too cold to do any serious work with our hands. Charlie and I discussed a good method for using his grinding machine for his project. Chuck brought by a very cool 6" grinding tool that is a composite of ceramic and, I believe, polyester. I am looking forward to trying it out on an upcoming mirror. Very glad that Chuck attended and am hoping that he is able to make it again in the future, as he brings a wealth of ATM experience to the table. Jay shared ideas and plans he has for a nice wooden eyepiece case. Jeff made some collimation tweaks to his 12" Orion dob. I believe the views will be impressive through that telescope after the changes he made. In preparation for hosting some telescope making friends from California, Josh and I discussed some refinements to his bath interferometer. Those refinements will make getting repeatable images of fringes (igrams) more obtainable. I shared the dew heater and controller I recently built. It works very well and is a necessary accessory for cold, damp nights. Since the ATM session, I have completed a version using a printed circuit board I made, rather than perf-board. That version is much more durable. I am willing to share the plans and assist anyone who wants to build one. To make one is considerably cheaper than what you can buy. We were treated to a great lunch of "white chicken chili" made by my wife; it was awesome! The next session is on 2/23 and then another on 3/30. Sometime after that, we will likely be having a Friday evening and Saturday session again; stay posted! Mat This message and any attachments are solely for the use of intended recipients. The information contained herein may include trade secrets, protected health or personal information, privileged or otherwise confidential information. Unauthorized review, forwarding, printing, copying, distributing, or using such information is strictly prohibited and may be unlawful. If you are not an intended recipient, you are hereby notified that you received this email in error, and that any review, dissemination, distribution or copying of this email and any attachment is strictly prohibited. If you have received this email in error, please contact the sender and delete the message and any attachment from your system. Thank you for your cooperation
How is she with liver and onions? It's an established fact that liver in the diet will gain you half a magnitude at the eyepiece. It's on the Internet so I know it's true. ;-) On Fri, Feb 1, 2013 at 12:13 PM, Hutchings, Mat <mat.hutchings@siemens.com>wrote:
We were treated to a great lunch of "white chicken chili" made by my wife; it was awesome!
You know, she likes liver and onions. She might be up for making it for the next session. I'm sure we can have pizza available for the non organ eaters. Mat -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Chuck Hards Sent: Friday, February 01, 2013 2:32 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] ATM report How is she with liver and onions? It's an established fact that liver in the diet will gain you half a magnitude at the eyepiece. It's on the Internet so I know it's true. ;-) On Fri, Feb 1, 2013 at 12:13 PM, Hutchings, Mat <mat.hutchings@siemens.com>wrote:
We were treated to a great lunch of "white chicken chili" made by my wife; it was awesome!
_______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options". This message and any attachments are solely for the use of intended recipients. The information contained herein may include trade secrets, protected health or personal information, privileged or otherwise confidential information. Unauthorized review, forwarding, printing, copying, distributing, or using such information is strictly prohibited and may be unlawful. If you are not an intended recipient, you are hereby notified that you received this email in error, and that any review, dissemination, distribution or copying of this email and any attachment is strictly prohibited. If you have received this email in error, please contact the sender and delete the message and any attachment from your system. Thank you for your cooperation
Mat, I have 2 Chinese 5-inch achromats that need to have their focal lengths measured. Any interest in doing it at the ATM session on Saturday? If they are within about 2mm of each other, I'll turn them into a big binocular. If not, at least one of them will probably be for sale. I'll bring the new RFT and if the weather cooperates, we'll look at the mountains, and maybe the sun if I get a filter rigged up by then.
Yes, absoulutely let's measure their focal lengths. Would also love to view through your beautiful, newly build scope! Mat -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Chuck Hards Sent: Sunday, February 17, 2013 11:23 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] ATM report Mat, I have 2 Chinese 5-inch achromats that need to have their focal lengths measured. Any interest in doing it at the ATM session on Saturday? If they are within about 2mm of each other, I'll turn them into a big binocular. If not, at least one of them will probably be for sale. I'll bring the new RFT and if the weather cooperates, we'll look at the mountains, and maybe the sun if I get a filter rigged up by then. _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options". This message and any attachments are solely for the use of intended recipients. The information contained herein may include trade secrets, protected health or personal information, privileged or otherwise confidential information. Unauthorized review, forwarding, printing, copying, distributing, or using such information is strictly prohibited and may be unlawful. If you are not an intended recipient, you are hereby notified that you received this email in error, and that any review, dissemination, distribution or copying of this email and any attachment is strictly prohibited. If you have received this email in error, please contact the sender and delete the message and any attachment from your system. Thank you for your cooperation
Thanks Mat. I've had them for a few years, with the idea of building a giant bino. I have the monster prisms needed for the erecting systems/interpupilary adjustment as well. I'm hoping that the focal lengths are close enough to permit the project. These are the Surplus Shed 127mm dia x 700mm focal length objectives in thermoplastic cells. The US Mil standard for magnification differences between the two halves of a binocular is 2%, above which the stereo effect is lost. The eye can accommodate for differences below 2%. That would mean that with 25mm eyepieces, for example, yielding 28X with a nominal 700mm focal length, the other objective could be mismatched about +/- 12mm before we exceed the Mil standard. So it's not as bleak as I first thought. But something like 5mm mismatch or less would be almost ideal. The closer the match, the higher I can push the magnification and stay within the Mil spec. On Mon, Feb 18, 2013 at 8:50 AM, Hutchings, Mat <mat.hutchings@siemens.com>wrote:
Yes, absoulutely let's measure their focal lengths.
Mat, one of our customers has unexpectedly accellerated their deployment schedule, so unfortunately I'll be working this coming Saturday and unable to attend the ATM session. Please let your wife know that she needn't prepare the liver and onions if I was the only one who was interested. Very sorry to have to miss out! :-( I'll see you guys next time, with any luck. On Mon, Feb 18, 2013 at 8:50 AM, Hutchings, Mat <mat.hutchings@siemens.com>wrote:
Yes, absoulutely let's measure their focal lengths. Would also love to view through your beautiful, newly build scope!
participants (3)
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Chuck Hards -
Hutchings, Mat -
Patrick Wiggins