Quote:Does anyone know the best setting for a tv 55mm plossl ( smoothside) for the Paracorr type2 ?
Celestron C11+EQ6, skywatcher /Zambuto 12"dob,watchhouse tracking platform, 16"/Zambuto lightbridge , Ethos's 6,8,10,13,17,21. Naglers 31,26. Lieca ash zoom, televue 2.5 powermate,2"2x powermate .Paracorr type2. Howie glatter 2" laser & Tublug. Lumicon 2" UHC, 03, H-Beta,Televue smoothies ( all of em) , Meade 4000 smoothies ( all of em). That'll do for now.
Quote:Since that eyepiece produces an 11mm exit pupil in your dob, do you notice the shadow of the secondary? Generally people who have f/5 dobs rarely go longer than about a 31-35mm eyepiece focal length.
C10NGT, Z8, 150 Rumak, XLT 150, C6, C5, SW5 Newt, 4.5 Ball, C102GT, C90, ST80, A70LF; 15x70, 25x100; Burgess BV; Paracorr II; T6 2.5, XO 2.58/5.1, Ethos-SX 3.7, Delos 4.5, TV Plossl 7.4-26, BCO 10, Hutech HC 12.5, Sterling 12.5-25, ES100 14, CZJ H 16/25, CZJ O 16, M5k UWA 24, T5 31, Ultrascopic 35, Titan-II 40; Bino Pairs M5k UWA 6.7, Baader Zoom 8-24, M5k SWA 24, TV Plossl 26, RKE 28.7; Zooms NZ 2-4, NZ 3-6, Leica ASPH 8.9-17.8, Baader 8-24; Baader Zoom Barlow, VIP Barlow
Quote:Yes, thanks, Don. I already purchased one of those awhile back. In fact, I think it may have been you that gave me the advice at that time! The only downside to the adapter is that you need to use a little hex key to secure or remove the eyepiece. I guess I could buy multiple adapters for all my 1.25" eyepieces that won't come to focus any other way in the Paracorr. But that would cost some serious money for me.Mike
Joe Teeter 20" f/3.6 Nagler 31mm T5 Delos 17.3, 14, 12, 10, 8, 6, 4.5, 3.5
Quote:Anyone input the Delos line into the settings?
Quote:Hello,I'm using a combination of a universal paracorr (plu-1106) and a tunable top (see attachment). Should I follow the same settings as with type-1 visual?Another question - can I simply make the distance between eyepiece field lens and the paracorr lens equal to 55mm, or there are other considerations?thanks in advance.
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:Looking at the Televue site, the 13mmT1 (nor any other T1s) are listed. Any ideas why not?
WO Megrez 120 ED on GP Mount
WO ZenithStar 80 ED II on Porta II
10" Meade LightBridge/Paracorr
Orion ED 100 on Polaris Mount
Astro-Tech 8" f6 Dob
Bushnell Ares 5
Meade 226 2.4" f11.7
SpaceScope 2.4" f15
Quote:Does it make it easier to focus the image at high powers or just at any time? And do you need certain eyepieces for it? I had a tough time focusing my 12" f4.9 tonight at about 170x so I was wondering if I needed this? I also started to notice the coma issue tonight. After reading about the Paracorr and what it does I started to notice it. I also see that they're very expensive.... :-(
15" f/5 Tectron
Mallincam Junior Pro
TMB 40mm Paragon,Leica ASPH zoom,
WO binoviewer w/assorted pairs
"Yeah, well, you know,that's just, like, your opinion, man."
Quote:With an f/4.9, I would just look for a used Type 1 Paracorr rather than spending the princely sum being asked for the Type 2. They can typically be found on the used market for $175-$225.
Quote:Quote:With an f/4.9, I would just look for a used Type 1 Paracorr rather than spending the princely sum being asked for the Type 2. They can typically be found on the used market for $175-$225. That's what I did. In my world, the full price of a new Paracorr Type 2 is out of the question. At f/4.8, my optics don't need correction that badly.Mike
Quote:So am I right in thinking that Televue is not publishing Delos settings for the Paracorr type I?gb.
Quote:Sarikakis,You should publish your findings as a list for Paracorr 1 and Paracorr 2. I own the PC 1 w tunable top. I have a 12.5" dob at f/4.0. With the PC it is 4.6. I was surprised to see that you believe the Nagler 22T4 requires a deeper/lower/closer setting than the ES 20mm 100 deg. I find that surprising. Similarly you find the ES 30mm 82 N2 is easily handled in the PC1, but the Nagler 31mm T5 cannot properly in-focus and must "bottom out" for its improved results--not optimal. Same with Ethos 17 and 21mm. Sounds like you are recommending ES series WFOV eyepieces for budget constrained PC1 owners as they fit. Thanks for the analysis.
Quote:Quote:So am I right in thinking that Televue is not publishing Delos settings for the Paracorr type I?gb. The 12mm and shorter use the same setting as other TeleVue 1.25" eyepieces.The 17.3 and 14 would use the top turned in all the way and that wouldn't be quite far enough for ideal correction, but it will still be a big improvement.And, as has been mentioned, if you have even one eyepiece for which a perfect setting has been found or dialed in, you can insert any other eyepiece and focus using the tunable top. When you achieve focus, that setting will be ideal for that eyepiece. Next time, you can pre-set the tunable top to that setting before inserting the eyepiece.
Quote:This is a VERY long thread as many people have contributed very useful information on this topic Just wondering if anyone has been keeping track of the posts and the reported settings for various eyepieces posted here ... if so, perhaps a table or partial list exists ? I did find most of the TV eyepieces with their Paracorr settings posted on their website.
SyedTeeter STS 11 f/4.3 Zambuto | XT8i | XT8g | XLT 150 | C90 | EON 80mmAT Voyager and Nexstar SLT mountsEyepieces: Mostly TeleVue and PentaxDenk II BV'er, Earthwin PFS-SE, Pentax 10x50 PCF WP II
Quote:Does it make it easier to focus the image at high powers or just at any time? and do you need certain eyepieces for it? I had a tough time focusing my 12" f4.9 tonight at about 170x so I was wondering if I needed this? I also started to notice the coma issue tonight. After reading about the paracorr and what it does I started to notice it. I also see that there very expensive.... :-(
Dr. Willie K. Yee President Mid-Hudson Astronomical Assn.Member RAC, AOSNY, IDA, Astronomers Without Borders, Charlie Bates Solar Astronomy Project
NexStar 50 Expert, Lunar 50 Expert; AL Outreach, Messier, and Sunspotters AwardsCommander Prius Class Shuttlecraft Zhang HengTeeter 13.1" f/4.5 Custom Dob, NexStar8 SE, Meade 80mm f/6 ED Apo, Meade 363 f/10 80 mm, Lunt LS60THa, PST dbl stk
Quote:Quote:Anyone input the Delos line into the settings? All the Delos eyepieces except the 17.3 and 14 will use setting "D" with the Paracorr's supplied 1.25" adapter.The 17.3 and 14 will require setting "A" for right now, also using the 1.25" adapter.There may be another, lower-profile, 1.25" adapter for the 17.3 and 14.0 a little later on, as the "perfect" correction for those two will require a setting a little farther in than setting "A". But "A" will still correct a lot better than no Paracorr, in the same way that the original Paracorr didn't completely correct the 31 Nagler or 21 Ethos but they still were improved a lot over no Paracorr.