David W. Knisely . . . . . . "If you aren't having fun in this hobby, you aren't doing it right." Hyde Memorial Observatory http://www.hydeobservatory.info Prairie Astronomy Club http://www.prairieastronomyclub.org
Quote:the Telrad is also very good because you can "acquire" the reticle very easily and you can see this reticle even off-axis.The Rigel is much worse in this regard; your eye must be positioned just right to see the reticle.I suspect the various red dot finders are more like the Rigel.Telrad all the way (I have two).
Quote:Is there a planetarium app for Android that will put the Telrad reticle on a selected object?
Quote:Quote:Is there a planetarium app for Android that will put the Telrad reticle on a selected object? Sky Safari had the capability to display the Telrad reticule. It can also be customized. There are three versions, the Basic, the Plus and the Pro. The Plus is $15, the Pro is about $40. Unless you are super serious and have a large scope, the Plus has about everything you need, the only difference is the size of the databases.Sky Safari is an amazing program, it has features that few if any desktop programs have. Sky Safari for the Android A Telrad is pretty big, about 8 inches long, mounting one on a C-90 is possible but something of a stretch.Jon
Quote: Outside of that, I think the multi-reticle finders are a good choice. They are a little more expensive, but very well made.
Quote: I have one of those Multi-Reticle finders, it sure looks a lot nicer than the standard red dot but it's not dim enough, the only reticule that has a chance of being dim enough is the red dot... The $25 OPT red dot is about as effective.Jon
14" f/4.8 Obsession Clone w/ ServoCat/ArgoNavis Apogee RA-88 Binocs
Quote:Or was it the $27 RDF that has the exposed battery? I have two of those in a junk drawer somewhere. They were cheaply made and just stopped working after a month or two. I thought the first was a fluke so I bought the second. Didn't want to buy a third so I picked up the multi reticle with the bright dot that everyone sells.
Quote:Boy, is this fun. Got the Porta Mount today and because the C90 gets turned 90 degrees to fit in the dovetail, the location of the base for the old finder scope is unusable. So I guess I wait and see if the Telrad will work with the two-sided tape. I should have seen this coming.
My eyepieces are made from the waste product of exploding stars. 10XTi 102XLT ST80A(2" Focuser) XW: All; XO: 2.58 Televue: Naglers-T1 Smoothside-full set, 17T4,12T4,Ethos 17,4.7; plossels-40,32,20,17,&7.4mm; Pans-22,24mm; Delos-6,8,12,17.3mm ES100: 5.5,9*,14,20 ES82: full set ES68: 16,20,24,34 NLV: 5,9,10,15 Ortho: HD-7,9; OPS-9,12 Meade RG 7mm Other: Pentax 12.5K(.965), 10mm Parks Zoom: Nag3-6 *=on b/o DAS Dark Site
Quote:Couldn't you reposition the focuser to compensate for the 90* mounting difference? Also, while the Telrad is about half the size of the scope, and it will look unique (in astronomy we prefer the word unique to weird), but as the mount can handle the weight, it shouldn't be a problem. Try to mount it as far forward on the tube as you can, and rebalance the scope (if you mount it towards the diagonal end, you could bang your head on it, not good). The problem is, where do you mount the actual finderscope. While Telrads are good, they are really meant to be used in conjunction with a regular finderscope. The telrad gets me into the ballpark, the finder shows me home plate....
XX12g, XT8, C80ED, C102GT, C90. t4s, t6s, a few pans and radians, UO orthos, ultimas
Quote:nik,I was going to mention that you might could contact Manny Myles(user name), a fellow CNer, who makes adapters to fit the Vixen Porta II mounts so that you can mount your C90 in the tradtional horizontal fashion. Several here have used his adapters and like them.Gary
Quote:Quote:Is there a planetarium app for Android that will put the Telrad reticle on a selected object? I just found this one called "astro tools" if you want something free - it has a telrad circle you can turn on or off. Wasn't aware of it earlier... can't comment on the app's usability yet.