Televue eyepiece

[mozzie]

Have a televue panoptic 35mm 68deg fov 2" barrel eyepiece with end caps and original box. This eyepiece is in excellent condition.

169059

$300 posted within Australia

Thanks peter

[mozzie]

Bump !!
Price drop 😀

[mork]

Has anyone tried this on a 16" lightbridge (f ratio 4.5) and can tell me how it worked for them?

I understand from reading other posts that the lowest magnification I can use is regulated by exit pupil 6mm to 7mm and this gives 27mm to 31.5mm.

[byronpaul]

Pieter,

I have a 35mm Panoptic, and regularly used it in my 16" Lightbridge which gives an exit pupil of 7.8mm, a FOV of about 1.3deg and 24mm of eye relief. Yes the exit pupil exceeds theoretical limits, but the views are stunning.

I still have the eyepiece but recently acquired a 31mm Nagler which I also use regularly. This eyepiece gives an exit pupil of 6.9mm, a FOV of about 1.4deg and 19mm eye relief. Once again the exit pupil exceeds theoretical limits, but the 35mm Panoptic or 31mm Nagler can't be beaten (IMHO) on wide targets like Orion or Eta Carina.

The key here is your personal preferences, what you like, and what you're after. A 13mm Ethos might tick the box on a 2.9mm exit pupil, but you're only going to get a 0.7deg FOV.

I don't think you would be disappointed with the 35mm Panoptic in your 16" Lightbridge if you like chasing wide FOV targets.

Paul

[mozzie]

Still for sale !!!!

[Renato1]

I've never understood that maximum limits in a reflector. The claim is that if you get the exit pupil too big, you'll start seeing the image of the secondary mirror as a partial shadow in the eyepiece view.

Yet I've happily used a 40mm 2" eyepiece in my 14.5" f/4.5 dob, giving an 8.8mm exit pupil - and I couldn't make out any shadow or significant light drop off in the centre of the image.
Regards,
Renato

[Jeff]

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