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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

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  1. B

    Canon 18x50 IS Moon and Jupiter.

    Currently the Moon and Jupiter easily in the same field. Separation about 1.9 degrees. Temperature about 0C. Very clear sky and pair very high in the south. Minus 5C in the morning. Regards, B.
  2. B

    3000x22 and 4000x25 binoculars

    Only £12.59 and £14.50. These binoculars must be great for close up views hand held. Also 2000x25 monocular for £6.48. 8000m/80000m. So 5.7 degree real field. About 11,000 degrees AFOV. B.
  3. B

    Canon 18x50 IS and partial lunar eclipse.

    Ongoing eclipse nicely seen in clear transparent sky after rain. About 15% of the bottom of the Moon dark with grey fringe above shaded part. 21.00 to 21.09 BST. Lots of detail and 4 Jupiter moons with Jupiter 6 degrees to the left of the partially eclipsed Moon. Regards, B.
  4. B

    Bushnell Xtrawide 4x21

    The Xtrawide 4x21 has the neat trick of including both the Hyades and Pleiades star clusters easily in the same field of view. There are not many binoculars that can do this. Regards, B.
  5. B

    900x25 Outdoor HD binocular.

    This is obviously better than the 200x25 and only £10.34. I think I'll order a gross. One behind the other and I get about 10 to the 300th magnification. Enough to see round the Universe many times. Isn't the internet great for shopping? Regards, B.
  6. B

    Scaffold poles.

    I was surprised to see vertical scaffold poles appear 25m or 80ft up and higher 120m away. Despite awful vision without glasses they were obvious and one correctly was identified as double with a small gap. With 8x32BA reversed binocular, I could not focus without glasses. But with glasses...
  7. B

    Binocular reticles.

    There are about 6,283 mils or milliradians in a circle. 1000x 2Pi. However, Nato use 6400 'mils'. Warsaw pact 6,000. Sweden 6,300. This is to allow easy division. And the Swiss apparently use 6,400 but measured from north, true or magnetic I don't know. So, are the reticles on binoculars...
  8. B

    200x25 binoculars.

    200x25 binoculars. 5000 degree field. Yours for only £19.93. When will these adverts stop? Never, it seems. Regards, B.
  9. B

    Xtrawide 4x21 Venus and Jupiter

    Clear and transparent now. Venus and Jupiter nice in the Xtrawide 4x21, but I didn't find Saturn. The two bright planets are not yet in the same field of 18.5 degrees. I estimate the separation ten minutes ago as about 21 degrees. They should be in the same field in the 2x54 and similar...
  10. B

    Minimalist lens converter.

    With some places not allowing binoculars but letting through cameras and lenses, there is the option of a lens/monocular converter. But these are large and may not be allowed in. However, there is a rare Leica 39mm mount lens adapter that is tiny and converts a Leica lens to a Galilean...
  11. B

    Mars occultation by the Moon

    At around 4.50 a.m. UT (GMT) on December 8 in the U.K. there is an occultation of bright Mars by the Moon. Binoculars should be ideal to view this. Times vary. I am not sure of U.S. times, but this event is widely visible. Check local times. Mars reappears about an hour later in the U.K...
  12. B

    Zeiss 6x15 Teletur and AFSA opera glass.

    It was asked on the thread Zeiss 6x30 IF whether a small 3x prismatic binocular was better than a 3x opera glass. I don't have a small 3x prismatic binocular, although I do have 3.5x, 4x, 4.4x and 5x larger modern prismatic binoculars. These larger binoculars are too large to consider here...
  13. B

    Repair shop 4/14

    Now BBC 1 Micro binoculars 7x16? Nessie Loch Ness. Richard repairs. B.
  14. B

    Stars under water.

    Can stars be seen when sitting at the bottom of a swimming pool? Yes. Pure water is very transparent, there have been lenses made using water. If one is sitting at the bottom of a swimming pool and if the water doesn't have many impurities then stars are apparently seen well if the water...
  15. B

    Toy binocular with extras

    I used this toy binocular this morning to view a crow perched on the chimney pot at 124m. The image was reasonably good with colour fringing. It is made in Italy, light blue plastic. Magnification about 2.7x. It measures 40x25x30mm closed. The objectives and eyepieces are hinged, probably...
  16. B

    Magnification needed for full resolution.

    Planetary telescope night vision. The minimum magnification for full resolution of an astro telescope at night is 13.5x to 14x per inch of aperture. So, for a 100mm scope 54x, but actually a higher magnification is needed in practice of 100x or a little more. For a 60mm scope 33x or actually...
  17. B

    Cost of testing every binocular.

    How much would it cost to buy and test every binocular made today? I thought of various ways to estimate this. But the simplest seems to be to estimate the number of binoculars. Say 2,000. Buy one of every £2,000 binocular. Two of every £1,000 binocular. Three of every £500 binocular. Six of...
  18. B

    Crazy world of Leica

    In June a Leica 0 camera sold for 12 million euros or 17 million euros with premium and VAT. A few years ago a Leica 0 sold for the bargain basement price of $2 million. It wouldn't surprise me if a Leica 0 was found at a boot fair for £10. A friend bought a Compur Leica for £60. I don't...
  19. B

    Vellardi 7x50 binocular

    This can be coin operated. Weight 90kg. 7x50 6.4 degree field. Fixed IPD at 62mm. Maybe not ideal for bird watching. Regards, B.
  20. B

    4x21 Xtrawide.

    Used Bushnell 4x21 Xtrawide binocular to view Mars and Jupiter. Both looked beautiful in the same field at 3.30 a.m. Slightly too far apart for Dowling and Rowe 4x22. I estimated the separation as 16.7 degrees. Both were in focus for me as the curved field means that towards the edge both...
  21. B

    8x32BA Noctilucent cloud bright display

    2022 June 12 02.55 BST to 03.53 BST Used 8x32BA extensively to view a major bright display of NLC. Elevation 5 degrees to 38 degrees. Azimuth 320 degrees to 035 degrees plus. There were smaller areas just larger than the 8x32BA field with ten or twelve closely evenly spaced horizontal bands...
  22. B

    Which binoculars fall over?

    When photographing binoculars, which binoculars fall over when placed vertically? The micro binoculars probably fall over. Does an Avimo fall over? Would an estimate of 10% of binoculars that cannot stay vertical without support be near the mark? I'll see if the Fuji 5x17 falls over...
  23. B

    8x32 BA

    I was viewing the alpha Persei cluster this morning in a clear sky with the 8x32BA. I noticed a fox in the street 15 yards from me. It looked fine in the binocular. There was a sudden flash of an animal that shot under the small Mitsubishi maroon coloured car parked in the street opposite. The...
  24. B

    Single lens telescopes

    Although this is not usually discussed in optics text books there are apparently chapters on this in some books although I haven't found any references. For me using my better eye, which is 2.5 dioptres far sighted, if I use a plus 1 dioptre or 1000mm focal length 40mm aperture single uncoated...
  25. B

    RN binoculars

    I watched the channel 5 programme Warcraft showing a destroyer in operation in 2019. On the bridge the standard binocular was the Zeiss 7x50 rubber armoured. There were rather many in use. Also a Swarovski possibly EL of 50mm or 42mm. There was a glimpse of possibly a Canon IS, perhaps 15x50...
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