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

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  1. R

    Optical Realities

    The use of water sprays and proper ventilation certainly helps but, unfortunately, does not eliminate all of the dust (as shown in the first 25 seconds of this video: ). Also, none of the mining companies in my area offer any type of retirement. So, most coal miners work until social security...
  2. R

    Leica APO Televid 82

    I would like to start by stating that I do not possess the technical knowledge of someone like @BoldenEagle. I purchased my used Televid 82 approximately one year ago and it is the only spotting scope that I have ever viewed through. The only comparison I can make is to a Takahashi 100mm astro...
  3. R

    During the winter, do you keep your binocular inside the car?

    My wife and I have left an inexpensive pair of porros in our utv for the last 4-5 years with no major problems.
  4. R

    Optical Realities

    As a third generation coal miner from southeastern Kentucky I have witnessed the effects of “black lung” on family, friends and fellow miners. I feel for you Brother, and will keep you in my prayers. “Coal workers' pneumoconiosis (CWP), commonly known as "black lung disease," occurs when coal...
  5. R

    View through binoculars

    Seems to be a wonderful opportunity to try/purchase a new bino.
  6. R

    Telescope vs. Super-Telephoto Lens for Imaging (Astronomy)

    As a newbie to pretty much everything optics related I found this article interesting and, I hope others may also...
  7. R

    Hi, from a new member

    Welcome Aboard…
  8. R

    General Binocular Recommendations

    Thank You. I will certainly check that link out.
  9. R

    General Binocular Recommendations

    @Mono and @kimmik Thank You for your replys. I can certainly see where a larger exit pupil would be less demanding on eye placement and, therefore create a more pleasant viewing experience….But, I do not see how this relates to pupil size and brightness (@kimmik, if your photography related...
  10. R

    General Binocular Recommendations

    Please forgive my ignorance and I certainly do not want to spread disinformation. I am still very much a rookie when it comes to optics. I thought this was more a scientific fact vs opinion (myth). This quote is from Roger Vine’s review of a Nikon 7x50: “Low light performance (twilight) is...
  11. R

    General Binocular Recommendations

    I completely agree with all of your points. The article is somewhat dated and would likely only help someone who was starting at ground zero. A basic understanding of terms like eye relief, field of view and exit pupil (and how they can effect binocular performance) couldn’t be a bad thing but...
  12. R

    General Binocular Recommendations

    This article from Cloudynights.com may help someone with their first binocular purchase. The latter part of the article is astronomy specific but, the first part is general information that any binocular user could use...
  13. R

    Interview with Zeiss Global Marketing Manager Segment Nature Petra Kregelius-Schmidt

    +1
  14. R

    An Evening With My Granddaughter

    Birds sighted: Cardinals, Blue Jays, Carolina Chickadees, Mourning Doves and Sparrows
  15. R

    An Evening With My Granddaughter

    I have been blessed to spend the evening observing God’s wonderful creation with one of my granddaughters.
  16. R

    Ultra wide binoculars

    I do not have any experience with the binoculars on your list. My son and I use Leica Trinovids 10x42 and Zeiss Conquests 10x42 for both day and night. Please keep us posted on your choice and experiences.
  17. R

    Long term quality...Leica or Swarovski

    I have never owned Swarovski but based on my experience with Leica: binoculars (Trinovids 10x42 new production), spotting scope (Televid 82 manufactured in 2010), surveying total station (TC1800 manufactured in 1995) and surveying theodolite (Wild T2 manufactured in the late 1960’s or early...
  18. R

    Hello from the Great Smoky Mountains

    Hello from Harlan KY. My wife is actually at Dollywood today.
  19. R

    Basic Star Testing Requirements

    The above Sinnott formula will give you the distance in inches but, I found a much cleaner version of this formula (in feet) on Cloudynights.com: N [ft] = 28 ( D/F )^2 D is the diameter in inches F is the focal ratio N is the result in feet.
  20. R

    Basic Star Testing Requirements

    Based on your above statement, I was interested in the math. I had found this formula derived by Roger W. Sinnott (Sky and Telescope, May, 1991): Distance=M*D*f (M=336*D/f^3) (where D is the aperture diameter (in inches) and the f is the focal ratio) but, this formula is based on ray tracing for...
  21. R

    Basic Star Testing Requirements

    Thank You. If it is not to much trouble could you please provide the link for “fast refractors”?
  22. R

    Basic Star Testing Requirements

    Thank You. Could you please provide the necessary formulas or provide a link (concerning the magnification and distance)?
  23. R

    Basic Star Testing Requirements

    Questions for star testing: - What is the minimum magnification required? - What is the minimum distance required? - Artificial star (DIY vs Commercial)? Thanks in advance.
  24. R

    Kowa 883 - best arca swiss plate?

    To the OP: I would call RRS (Really Right Stuff). https://www.reallyrightstuff.com/
  25. R

    $1K binoculars experiences - Conquest HD, Monarch HG, Tract Toric, GPO Passion HD, Trinovid HD

    Thank You. In my opinion this upgrade will make the Conquest a near perfect binocular for this price range.
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