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Is anyone seeing this? Is anyone posting? Dragan Nikin Chicago Il 60631 25" f/5 #610 30" f/4.5 OMI EVO

My first test was from my personal email. This is through the Groups.io GUI. Is this working for anyone? Dragan Nikin Chicago Il 60631 25" f/5 #610 30" f/4.5 OMI EVO

Does anyone have suggestions on what gear I could add to my OEM UC18 with ServoCat to permit extended exposures, say 240s or more?

Just to get registered as someone who can send mail.... I'd also be willing to contribute $ to aid the move. And if be willing to take a more active role as needed, the at the moment I'm out of country for a couple months, so not really to jump in with both {or even one} feet right away. Mark Get Outlook for Android

I have used auto wax on my 15” classic ebony star ground board but I have glass board on the 18UC and am wondering if anyone knows how to “grease or wax” the glass board on these scopes. Thanks for any information. Paul McCallum Get Outlook for iOS

Hello Group, In the voice of Rod Serling in Twilight Zone; "Submitted for your approval:” Some of you that may know this, but I make the decals for Dave Kreige. Hopefully the attachment will go through. I’ve had a request for a new design as a different product. A user had asked for a decal with a black background and white text. So I can make it as a decal, and/or as white vinyl applied graphics with no vinyl where there is black. So when applied to a black object, it will be a white logo as seen on the picture. Would this be something as an option that people would be interested in? Also, after enjoying being Charlie Stark’s web twin (https://www.marklessastronomics.com), for almost 20 year, I have redesigned my web page for anyone interested in FilterSlides, https://astrocrumb.com It has more info and stuff towards the bottom of the page. -Roger 18’ Classic Obsession www.astrocrumb.com

?I apologize up front for is tiny promo. But if anyone is interested in a FilterSlide, for the month of April throughout these difficult and isolating times, I'll pay for shipping anywhere on the planet. You can see my website, off list of course! Also, for anyone interested, virtual NEAF starts at 10 AM this morning. Eastern standard time: https://www.neafexpo.com/ Thanks, -Roger 18" Classic Obsession www.astrocrumb.com

My elderly 43 pound D34 Optima yellow top C20 55 amp hour battery is failing to hold a charge long enough for an extended observing session with my Obsession 18 classic with SC/AN, I have a powered ground board on my scope. At the end of a session AN/SC was not behaving normally, and the battery was under 8V. I thought it would be helpful to ask what deep cycle batteries those with a setup similar to mine use (brand and C20 amp hour capacity). I use an AGM battery (Absorbed Glass Mat) as my understanding is that type of battery is better than a lead acid battery for deep discharge, and it is cheaper than a gel battery. An identical replacement battery is around $250. I just haul my battery out into the field for use, it is not in an enclosure. I have terminals on the battery which are attached to a fused power cable, then which goes into the ground board. Pro tip: attach your cable permanently to the battery terminals rather than using spring loaded clamps which you attach and detach for each observing session: if you get the polarity wrong be prepared to spend a lot of time replacing fuses. Ask me how I know this! I thought it might be nice to have a power supply with a built in voltmeter so I could know the battery charge without having to pull out a multimeter. I have seen kits online for battery boxes for batteries that include cigarette style plugs, built in USB outlets and such. Most are for applications like ice fishing and so use small 7 amp hour batteries, my power needs are likely greater if the scope is slewing through the night and running dewheaters for the secondary mirror, telrad and finderscope. Does anyone use such an enclosure or built a battery box kit successfully? I like the fact I can run my scope for at least a few days without recharging with the D34 battery, but the battery is a little awkward to lug long distances as it weight 43 pounds and I carry it with a small strap that crosses the top of the battery. Optima has smaller battery sizes such as D35 which has 48 amp hours and weighs 36 pounds, or D51R which has 38 amp hours and weighs 26 pounds. What battery size do those of you with SC/AN and multiple dewheaters use? Does anyone use a heavy battery mounted to a cart for easier transport? I mainly use the scope to home, where there is a power source available. Thanks! Greg I enjoy the capacity of the 55 AH battery, but it is a b

Hello, This email message is a notification to let you know that the following files have been uploaded to the Files area of the [email protected] group. /Version 4.0 Locating ALT axis on Dobsonian.ppt Uploaded By: busy_sky_guy <busy_sky_guy@...> Description: Locating Alt axis on a Dobsonian v4.0 Scott Tannehill Cheers, The Groups.io Team

Hi Everyone, I am glad to see that the Obsession User group is back up and operating. I use to love the old site it was great and had a lot of good information. My main telescope i use is he Obsession 15 classic I have had since 2006. i am looking to replace the DSC encoders the old 8192 encoders. Can any tell what brand or type they are and what would be a good replacement without having to modify the scope axis. Any help would be greatly appreciate. David Brown from Central Mass.

Wow! That's the most new users I've seen come onto this group in one pass since it was created! Charlie: If I'd known you weren't here I'd have told you about it last year when you helped me get my scope updated. Welcome! Mark

Since we've had so much recent traffic, let me try to continue it. Im in the market for a new telescope trailer. I've been doing my due diligence and researching different manufacturers and I've finally settled on a brand. I can't find exactly what i want and need so I'm going to have one 'custom made'. It'll be a regular 5x8 aluminum trailer with torsion axle with a few mods to make observing life comfortable. Here are my questions. 2 fold. 1. Does anyone have any experience with insulation in an enclosed cargo trailer? It's a cheap option and I'd probably do it. I just wonder what some other scope owners may have to say about it. Do it? Avoid it? 2. What are your "must haves" when it comes to a trailer? Options? Opinions? Thanks in advance and clear skies! -Dragan www.deepskyforum.com Sent from my Samsung Note 10+

Hello everyone, I'm hoping someone will be able to point me in the right direction. My AZ encoder continues to cause me grief. The original 4K encoder it self seems to be working. The two thumb screws on the mounting plate are loose. I use an NGC-MAX computer with the scope. Many times when I do the second star alignment I get error values of 2 to 4 making the calibration useless. I suspect the encoder gets stalled, or pinched, due to play between the AZ bearing and ground board. I've never been happy with the o-ring attachment method or the need to have the thumb screws loose. Has anyone else had this type of problem? If so what did you do to solve it? Is there a connection kit that uses a belt to connect the encoder and the AZ bearing? If so from who makes it? If I do update the AZ encoder it needs the o-ring notch in it, is there work around for that? thanks for taking a look, Joe

Hello all, again, In response to Roger Greenwood's suggestion, here is the post that I placed on the old Obsession Yahoo Group today (July 30, 2020). Thank you for your indulgence! Greetings, Obsession Users, Greetings! It has been over a couples of years since I sent a general note on this group and I am not even sure if people are still receiving these emails [on the old Yahoo Group], but every year there are new Obsession owners who may not be aware of some of the ways to accessorize their new telescopes. So please excuse this brief intrusion. Most of the basic kits are still available, like the Fan Connection & Switch Kits (which preserve a switch on your Power Rail), and the Spider Wiring Kit to reduce your dependence on 9V batteries to power the Dew Guard on the secondary mirror. There are wiring kits for scopes without a ServoCAT and PGB, and wiring kits to get power transferred up to the UTA. And, of course, we still have the DSC Stalk for Argo Navis as well as one with a different shelf for the Nexus DSC. The Nexus Stalk is not on the website, so just ask about it when you email me. The Tablet Stalk is gaining in popularity, as well. After all, you need a place to put down the Tablet! There’s even a page just for UCs and a page showing a typical truss tube Dob’s electrical diagram and typical DC current requirements. And, many more items. Just one thing. My website hasn’t been updated since about 2015, so the prices are a little outdated. When you inquire, I will send an up to date quotation, so that you can decide. Looking forward to meeting your Obsession telescope needs. And now is a good time to get them before the fall rush! Best regards, Charlie Starks Markless? Astronomics http://www.marklessastronomics.com Accessories for Obsession Telescopes Obsession 20 #467

Hello all, Does anybody have any information on a transport case for a 22in UC? I did a little search and it to get it on an airline flight I need to keep the outside dimensions of the case at or under 90 linear inches. Technically a cube of 30in would work but the depth of the storage case does not need to be 30 in. Of course I would take the mirror out and not transport it with the mirror in it. I have not found a Pelican case big enough. Military Hardigg cases are a various sizes but I cannot find one to fit my needs. Has anybody been down this rathole before? I have touched base with a few case manufacturers for custom built cases but all of them quote me at a price that I am not willing to pay (not quite yet), as I will have added costs for excess baggage with an airline. I am located in Southeast Texas. Okie-Tex and TSP would not be that much of a problem to drive the distance but the Oregon Star arty I am hoping to fly closer to it before getting a rental vehicle. Suggestions? Regards, Frank

Hi Everyone, I have a Obsession 20" F5 which I have had for along while it doesn't get much used due its size meaning needing a 3 step ladder. I was thinking on converting it to a F4 or F3.5. I realize it will cost a lot of money but it is cheaper than new one of the 20" size. I have quotes for a F3.7 mirror for about 8k, a F3.5 for 7k and F4 for 6k. I would need new ota poles which I can buy from Obsession. Any words of wisdom and advice from the group. The main scope I use is my Obsession 15, which I love to use but the 20 does give some better views. David Brown email: bro061@...

Good day. I hope all is well with you and yours. As Jupiter and Saturn take their majestic place in the evening sky -- and with Mars not far behind -- I am looking for a lightweight planetary camera that can be controlled with an iPad or iPhone and not a Windows PC. I want to use this on my Classic 18* Obsession from my moderately light polluted backyard in the Mid Atlantic. Years ago I had an inexpensive Celestron webcam and using the various programs on Windows achieved modest results on Jupiter, Saturn and the Moon. I have the ability to use my iPhone 7 mounted in an afocal position to image the moon but am looking for a higher resolution and higher sensitivity camera the size of an eyepiece. And then I want to be able to control the camera and collect the images (usually a video stream) on my iPad for later processing on my desktop Mac. I have hunted around the internet and CN but failed to find a solution. Any recommendations? Thank you for taking the time to read and comment on my post. Regards, Rich

I live near DC and have owned an18UC for 11 years, happily commuting to dark sky sites 50 miles west of town to do my observing. I've had great success with the 18UC but am now looking for a property west of town and when I find it, I'm also considering getting a 25" Classic. Depending on the property, I might be able to keep the 25" in a garage or shed, and roll it out for use. But if not, I may need to set up some kind of observatory or roll away shed to house the 25". I'd like to keep it as simple and as small as possible. I don't want to undertake a major construction project. I just want to be able to use the scope with minimal fuss. I intend to use it visually - no astrophotography. I'm aware that there are some commercial off the shelf products out there, but am guessing that most of them are too small for a 25"? I'd appreciate hearing about what others have done. Sincerely, Bob Gardner

Hello! I am brand new to this user group. I have a UC18 and want to add a finder scope. Does anyone have suggestions for either the finder scope or on mounting it? Thanks! :) Steve

Am I missing something obvious? I am viewing through my smartphone, so maybe that is part of the problem, after looking at the "manual" for groups.io, I don't see an intuitive way to upload photos or make an album easily here. It looks to me that the photos section is supposed to be populated by attachments only? Not a way to create an archive. Anyone? -Roger 18" Classic AN/SC/FSA www.astrocrumb.com