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Thread: Royal Mail, bring me EP, bring me EP, …

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    Default Royal Mail, bring me EP, bring me EP, …



    Hello all,

    this morning the bell ringing at the door has been a wake up call. The Royal Mail brought the Leica (Leica Camera GmbH, Germany) B 20x WW eyepiece, I have been eyeing maybe since 2 years.
    Last week I have ordered this legendary, but unfortunately discontinued, spotting scope eyepiece from Birdnet Optics Ltd (U.K.), by giving a call to Paul at Birdnet.

    This f=22mm eyepiece is a home of 6 lens elements to offer the very wide true field of view of 3.45°, the apparent FOV is 69°, not bad at all.
    The first inspection reveals the broad spectral band amber multicoatings. Also remarkable are the planar surfaces of the field and eye lens.
    As primarily designed for the achromatic Leica Televid 77mm spotting scopes, the thin yellow/green fringe at the sharp field stop reveals the specific designed correction to lower the CA fringing.
    The first light through the 6” F/5 achro refractor on the houses across the valley has shown high contrast, high transmission of light, strictly neutral colour rendition, and a wealth of sharply rendered details on the sat antenna, on the photovoltaic panels on the roof, and on the curtains in the windows. The resolution slightly decreases across the last 5% of the field of view, but it is still acceptable. The terrestrial targets show no CA. The performance on the terrestrial objects may be one hair better than that of the Swarovski SW 20x. The Leica forces you to “discover” finer and finer details.

    The chimney test (black edge against the skies) confirms the incredible contrast of the view. When moving across the sweet spot of the best focus, the residual CA fringing changes between blue/red and yellow/green, and the 1:10 fine focusing is required to get the CA under control.
    So, this featured test shows similar results as with the Swarovski eyepieces.
    The eyepiece feels small and compact:
    height 68mm, diameter 53mm, weight 285g
    The estimated eye relief to overview the whole field of view is close to 8mm.
    The mounting bayonet will require an adapter to 1.25”, but it should not be problem for one of my friends to tool it.

    I feel really very happy to have this eyepiece in my arsenal, see the attachment.
    Best,

    JG
    Attached Images Attached Images
    Last edited by j.gardavsky; 12-13-2016 at 03:53 PM. Reason: typos
    frazmataz, DeanD, Peppy2 and 15 others like this.
    Binoculars: Leica Ultravid 7x42, 8x42HD; Swarovski EL 8.5x42 Swarovision; Nikon 10x70 Astroluxe; Docter Nobilem 7x50 Porro; Jenoptem 7x50W, 10x50W; BA8: 10.5x70, 15x85; 25x100FB, AsahiPentax 8x40, Refractors: Sky-Watcher 150mm/750mm; Leica APO Televid 82mm (25x-50x WW ASPH); EPs:Baader Classic Orthos; Fujiyama ortho, Leica B WW, ultrawide zoom ASPH, Periplan GF, HC Plan S, L; DOCTER UWA; Wild UW mil; Tele Vue Delos, Nagler Zoom, Plössls; Swarovski SW; Pentax XW; ZEISS diascope B WW T*, Carl Zeiss E-Pl; Hensoldt mil; Filters: Astrodon, Astronomik, Baader (CCD), TS; Astrophotography: AstroTrac; Leica R7: Leica 2/50, 2/90mm, 2.8/180mm lenses
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    Default Re: Royal Mail, bring me EP, bring me EP, …

    That looks very nice indeed, JG! Another real quality EP by the sounds of your testing and comparison with the Swarovski optics. Congrats on picking this up.

    I'm going to have to take a look at Birdnet Optics Ltd I think see if there's anything interesting....
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    Default Re: Royal Mail, bring me EP, bring me EP, …

    Congratulations on the new eyepiece.
    I look forward to first ( startlight ) report
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    Default Re: Royal Mail, bring me EP, bring me EP, …

    Awesome!! Congrats on the new Kit !!
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    Default Re: Royal Mail, bring me EP, bring me EP, …

    A very fine eyepiece JG, congratulations on such a fine addition to your arsenal!
    I hope your skies clear soon so you can give it a good test and enjoy the views.
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    Default Re: Royal Mail, bring me EP, bring me EP, …

    Very nice JG - Can't wait to hear how it goes once you point it up.

    Curious, what kind a pattern did the curtains have?
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    Moving on.......

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    Default Re: Royal Mail, bring me EP, bring me EP, …

    I understand that you are excited about this new wonderful eyepiece, but I am not sure how much. However, I am excited a lot for you! I look forward to hearing about your adventures with it!
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    Default Re: Royal Mail, bring me EP, bring me EP, …

    Congrats on the new glass, JG. It looks like a fine piece, indeed.
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    Default Re: Royal Mail, bring me EP, bring me EP, …

    Quote Originally Posted by sketrip View Post
    Very nice JG - Can't wait to hear how it goes once you point it up.

    Curious, what kind a pattern did the curtains have?
    Hello Steve,

    it is a white school building.
    The 'curtains' are thin metallic horizontal somethings, which can be pulled up or down, but due to their high contrast they are excellently suited to check the modulation transfer of the optics at high spatial frequencies.
    So are the elements of the photovoltaic, and the accessories on the sat dish.
    These targets have turned out to be the discriminator for the eyepieces performancy on my fast 6" achro.
    The other things in the field of view are the very high voltage electric overland lines and columns and insulators details.
    These objects are 7 - 8 km far away from my backyard.

    The chimney test is made on the nearby buildings to exclude the problems with seeing.

    Should there be anyone interested, I can dig out some digiscoping pics.

    Best,

    JG
    Binoculars: Leica Ultravid 7x42, 8x42HD; Swarovski EL 8.5x42 Swarovision; Nikon 10x70 Astroluxe; Docter Nobilem 7x50 Porro; Jenoptem 7x50W, 10x50W; BA8: 10.5x70, 15x85; 25x100FB, AsahiPentax 8x40, Refractors: Sky-Watcher 150mm/750mm; Leica APO Televid 82mm (25x-50x WW ASPH); EPs:Baader Classic Orthos; Fujiyama ortho, Leica B WW, ultrawide zoom ASPH, Periplan GF, HC Plan S, L; DOCTER UWA; Wild UW mil; Tele Vue Delos, Nagler Zoom, Plössls; Swarovski SW; Pentax XW; ZEISS diascope B WW T*, Carl Zeiss E-Pl; Hensoldt mil; Filters: Astrodon, Astronomik, Baader (CCD), TS; Astrophotography: AstroTrac; Leica R7: Leica 2/50, 2/90mm, 2.8/180mm lenses
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    Default Re: Royal Mail, bring me EP, bring me EP, …

    Quote Originally Posted by j.gardavsky View Post
    Hello Steve,

    it is a white school building.
    The 'curtains' are thin metallic horizontal somethings, which can be pulled up or down, but due to their high contrast they are excellently suited to check the modulation transfer of the optics at high spatial frequencies.
    So are the elements of the photovoltaic, and the accessories on the sat dish.
    These targets have turned out to be the discriminator for the eyepieces performancy on my fast 6" achro.
    The other things in the field of view are the very high voltage electric overland lines and columns and insulators details.
    These objects are 7 - 8 km far away from my backyard.

    The chimney test is made on the nearby buildings to exclude the problems with seeing.

    Should there be anyone interested, I can dig out some digiscoping pics.

    Best,

    JG
    I'm interested!
    Moving on.......

 

 
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