Posted 17 October 2013 - 06:58 PM
"Hurray! This night was clean and I worked with the telescope on my balcony testing UHC filter. You know, I like the effect. The light pollution level here is rather high (city's size is near a million citizens). Usually in my LT 8 SC, when I watch from the balcony, M42 (Great Orion Nebula) looks like triangle with a dark hollow on one side. But with the UHC filter I instantly saw "wings" (or as somebody calls this detail "a moustache") spreading from the center triangle. Sure the image was not as astonishing as in the real dark place far from the light pollution, but it was a good compromise in my opinion. PS Alignment procedure - 1-star (Betelgeuse), quick and precise. Watched М35, М67, М44, NGC2169, Juppiter, Mars. Tried to find the comet (ISON C/2012) but failed. I suppose it's still too faint for viewing from the city.
What is the brand of the UHC filter that you bought? and why did you choose that one? Also the picture of Jupiter is good! Did you use a DSLR with an adapter or some other type of imager? I would like to be able to take similar photos. By the way I too could not find ISON a few days ago... It was pretty dark in my location but still no luck. Also I had a similar experience with Mars, I think for me it was too close to the horizon so there was a lot of atmosphere to look through and I could not get a good focus. At higher magnifications I have a big issue with jitter when I adjust the focus. The focus knob is very sensitive and when touched perturbes the image. This happens so much so that it is often very difficult to get a good focus. Typically this happens when I try to use eyepieces that have a focal length of 8mm or less. I have been thinking about an electric focuser : http://www.jmitelesc...ages/mf_lx2.jpg
I have been using "StarGPS" and it works great. If anyone has questions about it I will do my best to answer...
Posted 17 October 2013 - 07:29 PM
About Jupiter - I used my Canon 600D DSLR on T-adaptor. It was 1-minute long video (ISO 200, exposition 1/80) later been stacked and processed in Registax 6 software (10% best frames). About Mars - I think it is too small now, will wait for opposition (April 2014) and then I hope I will make some more serious pictures.
An electric focuser - a brilliant idea! I wonder if there are ones for LT series - in the Internet I saw Meade motorized focusers for LS and LX, but not for LTs... For the precise focusing I use Bahtinov's mask with a small magnetic ring - it is very easy to put the mask in front of the corrector lens and accurately put it off after a focusing process is finished. Here's my accessoires set - eyepieces (Meade 4000 series 40, 30, 26, 15, 12, 9 and 6 mm plus Ortoscopic 7 mm), 2x Barlow lens, T-adaptor, filters (neutral, blue, green, red, yellow, UHC) and Bahtinov's mask. http://astrodummies....om/2013-07-31-9
Posted 22 October 2013 - 04:55 AM
As far as the electric focuser goes I think the Meade version for the LS requires the camera and uses it to automatically focus. The link above from JMI is the only electric focuser made for the LT that I know of. There are also some replacement manual focusers that I was looking at that reviewers claim reduce jitter : http://starlightinst...&product_id=120. The only problem I see here is that it requires disassembly of the existing focus knob and that looks a little too scary for me. Then there is also the added fine Crayford focuser which would slip onto the rear cell of the OTA: http://www.telescope...fordfocuser.cfm. I think this would be more manageable and probably allow fine focusing without massive jitter.
Bahtinov's mask is a great idea and I had never heard of it before; I will definitely pick one up.
My accessory set: 2x Barlow, Baader planetarium hyperion zoom eyepiece 8-24mm, YRGB color filters, 5mm Orion Stratus wide field eyepiece, and the Meade 4000 26mm eyepiece. After writing this I realize how covetous I have become for astronomical gear! Additionally I am thinking about changing over to 2" eyepieces + diagonal before I invest much more in the 1.25" gear I have.
Posted 22 October 2013 - 08:44 AM
Posted 02 October 2018 - 01:54 PM
I have recentlly bought a LT-8 ACF telescope with Audiostar controller. I am very pleased with the portability and the optics. I added anti-vibration pads and for me they really make a difference on focusing.
Can anyone tell me please if I can install a Meade LNT Smart Finder https://www.ebay.com...0&ul_noapp=true?
Posted 02 October 2018 - 03:09 PM
Unfortunately, that smart finder was built for the LNT version of the DS-2000 series Autostar Mount. It will not work on your scope. The LNT stands for Level, North, and Time. The issue with it was that the scopes it was made to be used on had main tubes of rolled steel. That process can impart a magnetic signature on the steel, which could throw off the magnetic compass in the LNT finder. One of the customers, who worked with metal for a living, figured out the problem. By then, the decision had been made to discontinue that particular mount, due to all the headaches people were having with them.
The time chip was placed back in the mount body after that and the rest of the functions were abandoned until they surfaced later, in a much more robust forum in the LS series scopes.
Hope this helps,
Posted 03 October 2018 - 11:47 AM
The LT model has two AUX ports. The connection to my laptop is made via the controller and it works ok. I tried to connect the laptop to the AUX ports with no success. I was wondering what equipment could use them?
Posted 03 October 2018 - 04:10 PM
I have sent in a question to email@example.com and copied your question and asked for input. I do not know if there are really any assessories that can use the ports. Possibly one of the discontinued models of imagers can do that. Possibly, something currently being made could use mount power to operate through that port. However, I would not plug anything into the port until we get more information. Your run the risk of damaging the motherboard in the scope. I am confident there are no replacement boards available.
I will post any answer that I get.
In case you do not already have a copy of the instruction manual for the LT, I just downloaded a digital copy and can forward it to you if you need it
Hope this helps,
Posted 04 December 2018 - 05:11 PM
I have not received a reply to my call to Meade. At this point, I doubt if there are any auxiliaries that are specifically built for those ports. I think they are there for future developments that never happened.
Posted 22 February 2019 - 08:50 AM
Thank you for letting me know.
I have just tested the LNT smartfinder module with my LT-8 and I can confirm that it is working flowlessly. I have permanently glued the LNT on the telescope. In the Audiostar I can set the red dot blink, I can do the auto alignment and the sensor calibration. I am very happy that it is working. Also, because I have added the StarGPS module with StarPatch update, the time provided by LNT is ignored and the gps time it is used instead. So, now my both aux ports are being used , one just for powering the StarGPS and one for the LNT module.
Posted 22 February 2019 - 10:14 AM
That is really good news. The information about using both aux ports is good also.
It sounds like you have a really nice setup now!
Posted 27 February 2019 - 12:52 PM
Posted 27 February 2019 - 05:00 PM
That sounds like a fantastic setup, Cezar.
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