-- Matt -observing since fall 2012 16" F/4.5 truss DOB / EON 120mm ED / 10" F/5 strut DOB Paracorr (T1 tunable),telrad, RACI finders, AltAz Tripod mount ES 82° 4.7,6.7,8.8,30mm AT Paradigm 60° 25,18,12mm Pentax XW 70° 20,14mm , Baader zoom observing list/notes.. beginning dslr astrophotos (moon/widefields)
My eyepieces are made from the waste product of exploding stars.
10XTi 102XLT ST80A(2" Focuser); President, Eypieces Anonymous, Denver Chapter (Hello, I'm an eyepiece junky, what's your excuse?)
DAS Dark Site
Quote:The problem I'm having would apply to a dob too .
Quote:But there is another solution: a Telrad.
Orion ED80 - AT Voyager with TNT,pier ext.,Vixon steel tray and Manny's mod.
Omni 120 cg4 with Orion pier ext. and RA drive, Binotron-27 (25mm & 17mm Sterlings)
Orion XT10(Original F/5) SkyStopper Equatorial Platform
Jason Constellation Model 311(Modified with 1.25"Crawford Machine focuser & rings)
Quote:I'm talking about sighting dwn the tube to get in the neighborhood of said object.. its more accurate if I'm looking down the full lenghtof tube.
First and foremost observing love: naked eye.
Last but not least, telescopes.
And I sometimes dabble with cameras.
Quote:I've only been out with thereflector 3 to 4 times... its very difficult the closer to zenith.. will iget better or moreused to this or is the laser common for larger reflectors?
Quote:this is the day i learn about rigels and telrads.. i didnt know there was another way! glad i asked ! i do have a raci like i said so once in the neighborhood im fine. ok i will check them out and do some reading.yes and the tube rings thing looks like a very good idea by doing a 3rd ring, that makes sense. i
Quote:Hey just to defend sighting down the tube... I have a newt+EP that gets a 2 degree TFOV, and I find sighting down the tube to be perfectly usable. My telescope usage pattern emphasizes starhopping, so if I'm within a couple degrees of my target I can usually figure out where I'm going. Being sloppy when I'm lining up actually helps me learn the stellar neighborhood a little better. The telescope has a cheap red dot finder, but I don't use it much and when I do it is not really any better than sighting down the tube (parallax being my chief complaint).It's on a dob so I can't actually get my head down to the low end of the tube, but it is just a little learning curve to develop the intuition when sighting from the middle of the tube.I've got a couple other scopes with a 1.5 degree field of view...not so much experience with them yet. They're usable sighting down the tube, but I will say with the smaller view it is a little more challenging, and I find myself wishing they had a decent finder.So...I know it's not for everyone but personally it fits my style just fine. Of course if I had any super long focal length instruments like an SCT, I would probably have different habits due to the small TFOV Back to your regularly scheduled more-sensible commentary...
Quote: My telescope usage pattern emphasizes starhopping, so if I'm within a couple degrees of my target I can usually figure out where I'm going. Being sloppy when I'm lining up actually helps me learn the stellar neighborhood a little better.
Quote:for my sct i have a generous 60* field and as ive read countless
Quote:Ok, a dob/newt owner that hasn't sighted down the OTA, please raise your hand.....
Quote: I looked down the tube thinking that would help.
Quote:The only time I sighted down the tube was one night my finder got bumped hard and I was collimating.
Quote: Quote:The only time I sighted down the tube was one night my finder got bumped hard and I was collimating. I do it every night out when I align my finder and telrad with polaris. Since they are removed after every session and never seem to be aligned when re-attached to the scope. Eric
Quote:i'd think a telrad would hold zero pretty well due to its mount
Quote: its getting within that narrow field in general which is challenging..
Zhumell Z12 Orion XT8 Orion Stratus 5mm EP Orion Q70 Super Wide Angle 26mm Explore Scientific 82 Degree 18mm Explore Scientific 82 Degree 11mm --- Star hopping my way around the night sky: 110 Messier Objects observed! Completed 3/15/2013 391 Herschel's observed, 9 to go!! 33 Herschel II observed, 367 to go! 24 Caldwell Objects observed, 85 to go! http://easternozarksastronomy.org
Ok. It sounds like a whole new level is going to open up for me with a telrad. I am having a hard time visualizing how this will help me point my scope to a refrence star or even star field like you say, if its only about 4 degrees view.. .unless its to be used with the two eye method ?
Quote:Using both eyes, you can see fainter stars.
Quote:As far as the riser, some people find the Telrad is positioned too close to the tube.
Quote:Even with a long focal length telescope with a restricted field of view, a Telrad may well be the only finder you need. Telrad mounted on the 60 inch at Mount Wilson