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Thread: ES82 6.7mm advice please

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    Default ES82 6.7mm advice please



    I have the 6mm BCO and while the views are splendid it is little hard EP to use (strange since the 10mm BCO is rather comfortable), but the main issue is the small FOV (0.5 degrees) with the 120ST f/5 and using an alt/az mount makes it rather a challenge to say the least. The 10mm BCO is an acceptable FOV at 0.83 degrees and it's pretty easy to keep an object in the field of view.

    So, I was thinking of the 6.7mm ES82 which will also present a touch less magnification 90x instead of 100x although the exit pupil with the 6mm is not an issue so the object is not too dim. The ES82 also will give 0.92 degrees FOV so no issue keeping the object in the field.

    However, how good optically is the ES82 specifically for DSOs? Is there any issue with this range being used with an f/5 refractor?
    Scopes etc: Skywatcher 12" Dob; Skywatcher 80ED & 120ST; EQ5; Grab and Go Alt/Az; 60mm RACI & Rigel Quickfinder.
    Eyepieces: Tele Vue Panoptic 24mm, Delos 10/14/17.3mm; Pentax XW 5/7mm; ES Maxvision 28mm; Baader Classic 10/32mm
    Filters: Astronomik UHC and OIII; Baader OIII; ES H-Beta
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    Default Re: ES82 6.7mm advice please

    Optically the ES 6.7 mm 82° EP is great and love it. I've used it in all my scopes including my little ST80 F/5 scope as well as my PST

    I've never regretted buying it - good luck
    Abb
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    Default Re: ES82 6.7mm advice please

    Many thanks, Abb!

    It doesn't look much larger than a (slightly chunky) 25mm Plossl - is that about right?
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    Scopes etc: Skywatcher 12" Dob; Skywatcher 80ED & 120ST; EQ5; Grab and Go Alt/Az; 60mm RACI & Rigel Quickfinder.
    Eyepieces: Tele Vue Panoptic 24mm, Delos 10/14/17.3mm; Pentax XW 5/7mm; ES Maxvision 28mm; Baader Classic 10/32mm
    Filters: Astronomik UHC and OIII; Baader OIII; ES H-Beta
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    Default Re: ES82 6.7mm advice please

    It's a nice little eyepiece. Works well at f6.3 on my refractor.
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    Default Re: ES82 6.7mm advice please

    I believe it is the smallest in size of the line, with the 4.7mm being a wee bit taller.

    It works great in my f/5 dob, though I'm at 227x with it. I have applied it to a few DSO's, some very faint and hard to see galaxies, and some stuff low down in altitude. It's a grea planetary eyepiece too, in my scope.
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    Bryan

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    Default Re: ES82 6.7mm advice please

    Awesome!

    Thanks Bryan for the complete info. Your F12 at f/5 using that EP gives the same power/inch as my 120ST f/5 so in theory should be the same brightness with mine but at 90x magnification. I guess the contrast and light transmission must be very good then if you're picking low down and very faint objects.

    It'll also come in very well with the C8 at f/6.3 as sometimes I need a bit more than my 8mm EP (160x) but my 5mm EP (256x) can be a bit too much for DSOs, so this will cover that middle ground giving 191x
    Last edited by Davesellars; 07-22-2016 at 01:06 PM.
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    Scopes etc: Skywatcher 12" Dob; Skywatcher 80ED & 120ST; EQ5; Grab and Go Alt/Az; 60mm RACI & Rigel Quickfinder.
    Eyepieces: Tele Vue Panoptic 24mm, Delos 10/14/17.3mm; Pentax XW 5/7mm; ES Maxvision 28mm; Baader Classic 10/32mm
    Filters: Astronomik UHC and OIII; Baader OIII; ES H-Beta
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    Default Re: ES82 6.7mm advice please

    No complaints about mine, it's a solid performer! The wide FOV is nice when you have a manual scope.
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    Default Re: ES82 6.7mm advice please

    I like mine though I need good seeing to get the best views out of my 8" SCT.

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    Default Re: ES82 6.7mm advice please

    Thanks guys!

    I've just ordered this 6.7mm EP along with an ADM vixen saddle that was on offer to attach to my Alt/Az mount as I'm using the saddle at the moment that is part of my guiding rig.

    hmmm.. perhaps I should have waited until AFTER my session tonight... Oh well, too late now....
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    Scopes etc: Skywatcher 12" Dob; Skywatcher 80ED & 120ST; EQ5; Grab and Go Alt/Az; 60mm RACI & Rigel Quickfinder.
    Eyepieces: Tele Vue Panoptic 24mm, Delos 10/14/17.3mm; Pentax XW 5/7mm; ES Maxvision 28mm; Baader Classic 10/32mm
    Filters: Astronomik UHC and OIII; Baader OIII; ES H-Beta
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    Default Re: ES82 6.7mm advice please

    Arriving fashionably late at this party but I do bring a gift.

    See the attached photo showing the relative sizes of the 6.7mm ES82° (middle) as compared to a 25mm GSO Plössl (LHS) and a 32mm GSO Plössl (RHS).

    Dimensions of the 6.7mm as just measured:
    Height with rubber eye-cap folded up = 95mm
    Diameter in middle of knurled finger-grip = 43mm

    Weights as just measured:
    25mm GSO Plössl = 79g
    32mm GSO Plössl = 122g
    6.7mm ES82° = 227g

    I'm just paying it forward here. I once asked the AF for photos comparing two ES eyepieces and was very happy to get them from a member here. Those made my decision-making much more effective. In like manner, I hope this comparison is what you need and that it of some value to you as well Dave.

    Edit: Aw shucks...too late. I just saw Dave's post that he had ordered it minutes before I uploaded mine. Such a slow typist here. Well, that too darn bad. Sorry eh!
    Attached Images Attached Images
    Last edited by PhilipLangley; 07-22-2016 at 08:33 PM. Reason: Add comment
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