Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Tv85 and televue ep owners question

  • Please log in to reply
14 replies to this topic

#1 sipster

sipster

    Ranger 4

  • -----
  • topic starter
  • Posts: 307
  • Joined: 20 Nov 2005
  • Loc: Pa. U.S.A

Posted 21 August 2019 - 09:27 PM

My tv85  is  my  most  used  scope. I  have  the high power  covered  with the 3 to 6 mm. I have  the low power well covered with the 35 pan down to the 13 ethos. The gap lies between the 6 and 13mm. Although  I  do  daydream  about  adding  a  21 ethos . Anyway, I believe  the  tv85  is  an  amazing  scope  for  85  mm  and  I  believe  I  can get better  views  of  targets  like the Hercules  glob  cluster  and the  ring nebula  for example on  the  right  night  with  the right  ep. I'm wondering  what  eyepieces  you  all  use  for which targets with everyones  experience . I would  love  to  hear . Thanks , 

Marty  


  • 25585 likes this

#2 scngc7317

scngc7317

    Ranger 4

  • *****
  • Posts: 313
  • Joined: 09 Feb 2009
  • Loc: CA

Posted 21 August 2019 - 10:09 PM

Be careful what you ask for  rofl2.gif

 

3520


#3 palaback

palaback

    Lift Off

  • -----
  • Posts: 18
  • Joined: 29 Mar 2009

Posted 21 August 2019 - 10:23 PM

I really love the TV85 for visual as well. Have had it over 10 years and it is still my favorite, just amazing for such a small scope. I use eyeglasses so I bought several radians. I mostly use the 8mm radian for smaller objects, and am using the 20mm plossl that came with it a lot more. I also got a 11& 14mm radian, and have a 22 Pentax. 8mm is nice because even if seeing conditions are not good I still get clear views of everything at fairly high magnification. If I had the 3-6 zoom I am sure that would be what I would use for planets. The plossl is nice especially for grab and go since it is so small and light. I agree a big 22 like the ethos would be a great eyepiece to have for wide field (like my Pentax). I generally feel for both of my scopes (a 9.25" SCT and the TV85) its nice to have 3 basic eyepieces (planets, medium, and wide field). If I was starting out I would probably go with the 3-6 zoom for planets, a radian in the 10-12 range and a 20-22mm or so either plossl or ethos.


  • sipster likes this

#4 Neptune

Neptune

    Apollo

  • *****
  • Posts: 1134
  • Joined: 16 Apr 2007
  • Loc: Georgia

Posted 21 August 2019 - 10:25 PM

Be careful what you ask for  rofl2.gif

 

scngc7317, I absolutely love the avatar. SLEEPER, one of my all time favorites. CLASSIC WOODY.


Edited by Neptune, 21 August 2019 - 10:26 PM.


#5 jeremiah2229

jeremiah2229

    Apollo

  • *****
  • Posts: 1482
  • Joined: 25 Jul 2015
  • Loc: Illinois, USA N 37° W 89°

Posted 22 August 2019 - 12:41 AM

Nagler T6s get used here a bunch.  waytogo.gif

 

 

Peace...


  • cwright likes this

#6 25585

25585

    Fly Me to the Moon

  • *****
  • Posts: 5032
  • Joined: 29 Aug 2017
  • Loc: In a valley, in the UK.

Posted 22 August 2019 - 05:52 AM

7, 9, 11mm Delites.


  • sipster likes this

#7 rustynpp

rustynpp

    Surveyor 1

  • *****
  • Posts: 1603
  • Joined: 27 Aug 2004
  • Loc: NYC

Posted 22 August 2019 - 08:17 AM

In my C80ED (very similar aperture and FL):

 

31T5, 13 APM, 6.5 Morpheus. Gonna pick up the 4.5 Morpheus at some point.


  • 25585 likes this

#8 Joe in Gatineau

Joe in Gatineau

    Lift Off

  • -----
  • Posts: 24
  • Joined: 19 Aug 2010
  • Loc: Gatineau Canada

Posted 22 August 2019 - 08:38 AM

Just love the TV-85 for visual. 

 

Just replaced my 35 Panoptic with a 31 Nagler, and have a 17, 13 & 4.7 Ethos, 8 Delos & 6-3 Nagler Zoom.

 

I'm finding that I use the 13E & 8D less and less, and am seriously thinking of selling both to replace with 10 Ethos. I don't wear my glasses when observing.

 

BTW - all of the above are parfocal in the TV-85, including the 13E if you add the 2" barrel extender from Tele-Vue. Helps a lot on un-driven mounts.


  • 25585 likes this

#9 25585

25585

    Fly Me to the Moon

  • *****
  • Posts: 5032
  • Joined: 29 Aug 2017
  • Loc: In a valley, in the UK.

Posted 22 August 2019 - 09:02 AM

Using heavier eps, I find the Equaliser good when going to 1.25". 


  • rustynpp likes this

#10 sipster

sipster

    Ranger 4

  • -----
  • topic starter
  • Posts: 307
  • Joined: 20 Nov 2005
  • Loc: Pa. U.S.A

Posted 22 August 2019 - 09:35 PM

Just love the TV-85 for visual. 

 

Just replaced my 35 Panoptic with a 31 Nagler, and have a 17, 13 & 4.7 Ethos, 8 Delos & 6-3 Nagler Zoom.

 

I'm finding that I use the 13E & 8D less and less, and am seriously thinking of selling both to replace with 10 Ethos. I don't wear my glasses when observing.

 

BTW - all of the above are parfocal in the TV-85, including the 13E if you add the 2" barrel extender from Tele-Vue. Helps a lot on un-driven mounts.

Sounds like a nice line up. I will consider the selling the 35 pan for 31 nagler idea. I have been thinking  about  adding  a 21 ethos or a 8 ethos  to my line up next. I have a 13 ethos  and wonder if I should go 8 instead of 10 to split the gap between my 13 ethos  and 6 Raiden. What do you think about my next choice with my listed eyepieces  for the tv85 ?



#11 sipster

sipster

    Ranger 4

  • -----
  • topic starter
  • Posts: 307
  • Joined: 20 Nov 2005
  • Loc: Pa. U.S.A

Posted 22 August 2019 - 09:42 PM

7, 9, 11mm Delites.

Interesting  thought . Just wondering , do you base this opinion on the Japanese  manufacturing at all? I just bought my first delight .. 3mm for planets. Haven't  got to use it yet. Hopefully  Saturday  night .



#12 25585

25585

    Fly Me to the Moon

  • *****
  • Posts: 5032
  • Joined: 29 Aug 2017
  • Loc: In a valley, in the UK.

Posted 23 August 2019 - 07:13 AM

Interesting  thought . Just wondering , do you base this opinion on the Japanese  manufacturing at all? I just bought my first delight .. 3mm for planets. Haven't  got to use it yet. Hopefully  Saturday  night .

Nice lightweight eyepiece for travel. The exact opposite of a 31mm Nagler!

 

The 35 Panoptic is lighter and less bulky, and not much TFoV difference.

Attached Thumbnails

  • astronomy_tools_fov (58).png

  • gjanke likes this

#13 rustynpp

rustynpp

    Surveyor 1

  • *****
  • Posts: 1603
  • Joined: 27 Aug 2004
  • Loc: NYC

Posted 23 August 2019 - 07:28 AM

Nice lightweight eyepiece for travel. The exact opposite of a 31mm Nagler!

 

The 35 Panoptic is lighter and less bulky, and not much TFoV difference.

Darker background, smaller exit pupil, larger AFOV & TFOV.

 

Maybe it's just me, but I knew that if I bought the 35 pan I would just be counting down the days until I allow myself to upgrade it to the 31T5. If you have the means and can support the extra ~250g or whatever it is, the 31T5 is a true end-game EP. That is to say, there's nothing to upgrade to.

 

In general I like the buy once, cry once philosophy. It's especially attractive with EPs since they're not cripplingly expensive (unlike many top-tier scopes) and can be used with every scope you have, today and into the foreseeable future. But of course we all must live within our means.


  • sipster likes this

#14 Joe in Gatineau

Joe in Gatineau

    Lift Off

  • -----
  • Posts: 24
  • Joined: 19 Aug 2010
  • Loc: Gatineau Canada

Posted 23 August 2019 - 07:37 AM

True, there is not much difference in the field of view between the Pan 35 & Nagler 31, but I found that the view in the 31  was more pleasing with the stars as pinpoints further towards the edge, and easier to look through. It also complements the 17E very nicely. I can scan the sky with the 31, then zoom in a bit with the 17. As for the 13E, it's not much of an increase in magnification from the 17, so I don't use it much.

 

Bought the Delos 8 because I had heard so much good about its sharpness, and it is very sharp, but having a narrower fov than an Ethos, it doesn't really fill the gap between the 13E & 4.7E for me. It is a bit low power for globulars, and more so for planets. I think that I might use either an 8E more, or if I follow my previous post, replace both the 8D & 13E with a 10E. Ideally I would purchase both 10E & 8E to try, but they are quite expensive, unless found used.

 

I use the 6-3 zoom for double stars & planets on a driven mount, and the 4.7E for planets and globulars on a push-mount. The 4.7 is actually a bit brighter than the 6-3 zoom at similar focal length. Remember, everyone's tastes differ & what works for me might not be ideal for others.

 

Joe



#15 25585

25585

    Fly Me to the Moon

  • *****
  • Posts: 5032
  • Joined: 29 Aug 2017
  • Loc: In a valley, in the UK.

Posted 23 August 2019 - 11:45 AM

Darker background, smaller exit pupil, larger AFOV & TFOV.

 

Maybe it's just me, but I knew that if I bought the 35 pan I would just be counting down the days until I allow myself to upgrade it to the 31T5. If you have the means and can support the extra ~250g or whatever it is, the 31T5 is a true end-game EP. That is to say, there's nothing to upgrade to.

 

In general I like the buy once, cry once philosophy. It's especially attractive with EPs since they're not cripplingly expensive (unlike many top-tier scopes) and can be used with every scope you have, today and into the foreseeable future. But of course we all must live within our means.

It is sad that the 31T5 is considered "endgame". By TV and other makers. Its an older design and with contemporary optical development & materials, could be improved.

 

WRT exit pupil difference 0.57mm is not a lot, a mm is a tiny unit. In a TV85, both 31 & 35 are under 5mm, just.


Edited by 25585, 23 August 2019 - 11:47 AM.



CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics