Search:

Type: Posts; User: Robert Martellaro; Keyword(s):

Page 1 of 20 1 2 3 4

Search: Search took 0.13 seconds.

  1. Cosine of tilt angle seems to work. I don't...

    Cosine of tilt angle seems to work.

    I don't think ± matters as long as the lens shape is meniscus.
  2. Replies
    1,588
    Views
    9,434,548

    James "Son" Thomas - Standing At The Crossroads...

    James "Son" Thomas - Standing At The Crossroads 1969


    https://www.youtube.com/watch?v=9tmYpnNQPFg
  3. Human error, resulting in deferred success. Let...

    Human error, resulting in deferred success. Let them go if it happens again.
  4. I'm not a wrap expert, but to the best of my...

    I'm not a wrap expert, but to the best of my knowledge the FP and PRP should match the IPD regardless of the degree of tilt.
  5. The fitting and prism reference point should...

    The fitting and prism reference point should measure 63 with a tolerance of 0.33 Δ or 1.0 mm, depending on the power. Use a cutout chart to measure.
    ...
  6. Sola's aspheric spectralite lenses (ASL) were the...

    Sola's aspheric spectralite lenses (ASL) were the only front aspheric st28 available. Put hundreds of folks into it that were wearing poly and 1.67. Steepest BC was about +7.50.

    Back atoric trivex...
  7. Replies
    1,588
    Views
    9,434,548

    Allman Brothers - Every Hungry Woman 1970 ...

    Allman Brothers - Every Hungry Woman 1970


    https://www.youtube.com/watch?v=MHXC644k0iM

    Low res excerpt from 16mm film and 16 track audio.

    About 9 months before Fillmore East.

    Atlanta...
  8. Replies
    12
    Views
    571

    The near point blur is due to power, position, or...

    The near point blur is due to power, position, or both. Strongly recommend standard corridors for task glasses, confirm that add power is not too strong, verify that the distance PD was used for the...
  9. Replies
    12
    Views
    571

    The +1.50 is the old add? Distance the same?...

    The +1.50 is the old add? Distance the same? Might just be that the wearer became used to a longer work distance at near and the stronger add is blurring that distance.

    I saw a lot of folks with...
  10. I observed no difference on the two people I...

    I observed no difference on the two people I tested under unfiltered summer sun (43˚ latitude), brown polarized, AR coated sunglasses, with a very good light seal, and clear AR coated eyeglasses.
  11. Fun, if you enjoy "jerking away in the sand". See...

    Fun, if you enjoy "jerking away in the sand". See Robin Williams explaination of the game below (language).

    https://www.youtube.com/watch?v=14NQIq4SrmY&t=104s
  12. Replies
    1,588
    Views
    9,434,548

    Postmodern Jukebox - Barbie Girl 2015 ...

    Postmodern Jukebox - Barbie Girl 2015


    https://www.youtube.com/watch?v=4ReSV3CCRzg
  13. Replies
    6
    Views
    520

    Your welcome. Yes. Titrating the prism might...

    Your welcome.

    Yes.
    Titrating the prism might be the only solution if they won't allow a more appropriate frame size/shape/lens design.

    Hope this helps,

    Robert Martellaro
  14. Replies
    6
    Views
    520

    Base in prism should cause slanting down to the...

    Base in prism should cause slanting down to the right and left. It takes about 5 to 10 days for the brain to remap the image, with adaptation occurring almost overnight.

    Fitting closer reduces...
  15. Replies
    14
    Views
    1,314

    https://www.youtube.com/watch?v=FuXpD3xDwvU

    https://www.youtube.com/watch?v=FuXpD3xDwvU
  16. Replies
    1,588
    Views
    9,434,548

    Freddie King - Ain't No Sunshine 1973 ...

    Freddie King - Ain't No Sunshine 1973


    https://www.youtube.com/watch?v=2uVhgeTUQRo
  17. Replies
    2
    Views
    260

    Solar Eclipse/Corona/Eye Safety

    Remove your solar glasses (ISO 12312-2) so that the corona becomes visible. Do not look at the event during totality with the solar glasses or filters in place- you will see nothing.
    ...
  18. Replies
    1
    Views
    208

    New York Earthquake

    https://www.youtube.com/watch?v=Cczqpb421So

    Fox reports the United Nations building is leaning to the right, MSNBC to the left.
  19. Replies
    1,588
    Views
    9,434,548

    Previously posted....

    Previously posted. https://www.optiboard.com/forums/showthread.php/40333-Old-Tunes-on-Youtube?p=566323&viewfull=1#post566323

    Big Skynard fan though, especially when Steve Gaines joined the group....
  20. Replies
    1,588
    Views
    9,434,548

    Trombone Shorty - St. James Infirmary 2012 ...

    Trombone Shorty - St. James Infirmary 2012


    https://www.youtube.com/watch?v=FSbP6ZhfPs0
  21. Replies
    1,588
    Views
    9,434,548

    Barefoot Jerry - You Can't Get Off With Your...

    Barefoot Jerry - You Can't Get Off With Your Shoes On 1975


    https://www.youtube.com/watch?v=3ICsXSjU17E
  22. Replies
    52
    Views
    5,398

    Scroll down to "Puzzle" and the differences...

    Scroll down to "Puzzle" and the differences between virtual and real images.

    https://www.eophtha.com/posts/fun-with-prisms-in-ophthalmology
  23. Replies
    1,588
    Views
    9,434,548

    Muddy Waters - Can't Get No Grindin' 1973 ...

    Muddy Waters - Can't Get No Grindin' 1973

    Guitars- Hollywood Fats (age19), Bob Margolin, Calvin "Fuzz" Jones
    Drums- Willie 'Big Eyes' Smith
    Keys- Pinetop Perkins
    Mississippi Sax- Mojo...
  24. https://www.youtube.com/watch?v=9hNIX7V21pU

    https://www.youtube.com/watch?v=9hNIX7V21pU
  25. Looks like the B&L I have. Yes, it rotates,...

    Looks like the B&L I have. Yes, it rotates, that's how you find the degree of astigmatism, if any, and the axis. I remember one that had a drum that was hard to turn- lubrication fixed it, but I...
Results 1 to 25 of 500
Page 1 of 20 1 2 3 4