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Found 6 results

  1. I am looking to protect the gear I have in the roll-away Tardis observatory I built this year (see this thread on the build if you are interested: A dehumidifier: https://www.appliancesdirect.co.uk/p/md400/electriq-md400-dehumidifier) A greenhouse heater: https://www.greenhousepeople.co.uk/products/3872/slimline-eco-heater-55w-tube-heater-with-thermostat/ The observatory itself is around 1 meter square and 2 meters tall. Ventilation is currently provided by the gap in the base around the pillar, a large vent behind one of the 'Police Box' signs at the top, and the gaps around the door caused by my general bad workmanship! Do these seem suitable for my needs? Is there anything else I should consider?
  2. Hello! I have been looking through the forums sections of this site and found that nichrome wire is a very popular material for dew heaters. I was using my DSLR a several weeks back, and the dew was horrible and it encouraged me to build a nichrome heater. My first heater prototype consisted of 22" of wire with a resistance of 4.08 ohm per foot connected directly into a 12V power supply (consisting of 8 AA batteries in parallel). It was wrapped in duck tape. It worked for a while, but then the batteries began to overheat and I had to pull the heater out to let them cool. When I used the same prototype heater on 6V (4 AA batteries) it didn't have this same overheating issue, but it produced less heat then when it was on 12V. I'm not using a pulse width modulator, but would that solve this issue? I'm worried as the heater is only really around 8 ohm, it may be short circuiting with such little resistance. The wire can't be terribly long as this is just to heat a DSLR lens. Any input on a solution would be greatly appreciated. Thank you.
  3. Has been 30 years since I have braved cold and wind to observe, and...well, I forgot some of the early lessons. Might be helpful for other beginners to share the experience. To start with, thanks to the FLO and meteoblue I was super positive that I will have a night of no clouds and actually good seeing, with gentle jet streams and good transparency. I have conveniently decided to ignore the indication that the wind is going to pick up as the night progresses. Fine. Called a friend who I wanted to introduce to astronomy (he is a photo geek) and off we headed to a hill near Belgrade. Bortle 5, 500m elevation, not the best, but at least outside of the worst of the LP bubble. 4C outside...and the wind giving us the warning shot. Now, I usually like to arrive during twilight to set up, this time it was dark already (7:30 PM), but it was easier with someone to hold the red lamp and help with stuff. Except that the wind was already there. By the time I have set up the rig my fingers were numb. I want Nexstar Evolution and less clutter...but that is for another topic and I guess I am whining too much. Given that it was cold and windy, I should have used my brain and set it up without a dew shield. We were not going to spend hours there and freeze to death, and the wind delays dew formation. But I have not used my brain, and instead mindlessly put it on autopilot...and set everything up. The second wrong decision I made was to extend tripod legs more than I usually do. I have no idea why I did that, I am very conscious of the setup limitations and was always prepared to sit low in order to have a more stable rig. Somehow, this time I just...did otherwise. Now I used my brain when I decided to bring the binos too. Since there were two of us, both had something to play with at all times. Brownie points for me, will always do that in the future. M42 was impressive, I have to say that this time UHC only marginally improved what looked already really good in ES24 at 68 deg. The rig was still reasonably stable. My friend was amazed and spent quite some time studying it. Mindlessly spent 5 minutes trying to find Rosetta (why, oh why) typing its number in the IC, instead of the NGC catalogue. Meh. Anyway, it was not there, not even with UHC, either it is a no-go target or I did something wrong. M41, M35, M37... all nice, but the rig was shaking more and more. Dew shield acted like a sail and amplified vibrations on the Az Goto tripod. Finally, Jupiter. Excellent transparency and some really good seeing...when the rig was not vibrating. Four dark bands...and I thought I saw the GRS...it was simply gorgeous...except that the wind got progressively worse...11 m/s and we called it quits.
  4. Hello, I have been doing a lot of research on this and I am reading a lot of contradictory information. I have an Orion Sirius Mount, with an ED80 and T3i for imaging, and ST80 with ASI120MM for guiding. I am trying to get prepared for the colder weather currently. Now, I have read that everything should be fine, I can keep my whole setup in my garage in freezing temperatures and I won't have much cooldown time when getting set up. I don't use the hand controller anymore, and I have read that the display stops working on it in cold weather anyways. I also have an AC adapter for my camera so I don't have to worry about short battery life. I read that the lube in the Sirius will harden in freezing temperatures and could cause damage to the gears. I was going to take apart my mount and re-lube everything before winter just to be safe, but is that necessary? Also, what lube should I use if that is recommended? Thank you in advance!
  5. Hi everybody!! Just joined after lurking for a year. I have done the filter removal as instructed by Gary Honis and was satisfied with the results. Only one thing I'm wanting to learn and that's how to do a cold finger mod on my canon 1000d. I have found some links, but mostly any instructions I've found were outdated and removed from the web, so it's been difficult to find a mod to my liking with detailed step by step and supply list. One of my main concerns is that I still want to use the side of my camera that has usb and the input for my intervalometer (currently unguided with no laptop). I can do without live view as long as I can still connect the dslr to my phone on dslr controller for a bigger more comfortable live view. Anyways I really need help in the right instructions to get this done. Any links, videos, or experienced instructions would be a big help and I would be very thankful for. I'd also like to add that I would like to go light weight on the mod, so i don't have much trouble balancing the es 80mm triplet on an Orion sirius. Trying my best at a budget to defeat the Texas summer. Clear skies!
  6. I am just starting out, and trying to map the sky before I invest in a telescope. Question: are there any Messier objects that I can view with a pair f binoculars?
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