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Thread: Some experiments with image intensifiers and cams...

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    Default Re: Some experiments with image intensifiers and cams...



    Size comparison of pvs-4 with biocular

    http://i100.photobucket.com/albums/m...psitkzacnu.jpg
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    Default Re: Some experiments with image intensifiers and cams...

    The 25mm tubes are some of my favorites for their wide FOV!

    I like your ideas for setup. Your idea of coupling a gen 3 with the p8079hp is very interesting. I have no tracking mounts so I do not really take photos with my setups. Visual observation right now. I do have some relay lenses for my dslr when I decide to get a tracking mount. I have a NiTec 25mm housing that has Nikon F mount for lenses and a very large dslr relay lens you can use in place of the biocular eyepiece on it

    Also have the Litton dslr and ccd relay lenses for my M942 housing.
    Last edited by Vondragonnoggin; 03-19-2019 at 01:49 PM.
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    Default Re: Some experiments with image intensifiers and cams...

    Lucky you are for sure!

    Here in Europa, for limited DIY budget for hobbyist, it is challenging to find this kind of material...

    This idea of combining the best of these two tubes would give a "Beast" having incredible performances, I am quite sure.... Especially while choosing carefully the spectral response of the photocathode from the first stage...

    It would allow to use a wider range of scopes and objectives in general, with F/D >> 2 (for instance).
    Indeed, as you mentioned somewhere, II tube needs to be "fed" with enough photons for working largely above its E.B.I level....
    Therefore it requires to use optics being as fast as possible...

    With this powerful combination, it should be possible to obtain good and bright image even with a scope at F/D let's say of 10-15 or more...
    and two important points:

    -Working with long focal, would allow the PC of the tube to properly sample the delivered image by the scope... in other words, to avoid some under-sampling problems, degrading the resolution of the final image...

    -I guess it would also allow to play with extremely narrow, therefore "agressive", band filters even with extremely faint objects.

    Here a fist crude test, with a relay lens between the two stages (P8079HP/MX10160)...

    https://www.cloudynights.com/topic/5...10160-p8079hp/

    IMHO...

    Cheers.

    Flaneurstellaire
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    Default Re: Some experiments with image intensifiers and cams...

    I read through the thread you linked. Very interesting setup indeed.

    I understand budget limits. I have less expensive telescopes and more expensive Night Vision eyepieces I bought largely used. Actually all housings used but some new tubes.

    I discovered an eBay seller named bjomejag that sells all kinds of filters at very friendly prices. I paid $140 for my 3nm 2” Ha filter. He now has 4.5nm and 7.5nm 1.25” filters for around $130. Best prices I have seen for narrowband filters. I think he works closely with Omega filters because he mentions for custom filters a link to Omega Filters site.

    Compared to Baader, Astronomik, Astrodon, Chroma, etc, his filters are very reasonably priced. He has a 100% rating with over 5000 sales.
    "To confine our attention to terrestrial matters would be to limit the human spirit."
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    A varied hodgepodge of observing gear,

    Skunks that sniff my feet while observing...

  5. The Following User Says Thank You to Vondragonnoggin For This Useful Post:

    Flaneurstellaire (03-19-2019)

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    Default Re: Some experiments with image intensifiers and cams...

    Thanks for the info...
    I quickly saw his offer on E-Bay. Very attractive! and with documentation for each filter...

    Kept in one corner of my coming shopping list...

    Cheers.

    Flaneurstellaire
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