Site Sponsors
Page 1 of 2 1 2 LastLast
Results 1 to 50 of 85

Thread: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

  1. #1
    Senior Member JimCollum's Avatar
    Join Date
    Oct 2007
    Location
    santa cruz, ca
    Posts
    936
    Post Thanks / Like
    Images
    155

    Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    No Hotspot
    Leica 21mm 2.8 Pre asph
    Leica 21mm Asph
    Zeiss 28mm 2.8 Biogon
    Leica 50mm 1.4 Summilux preasph
    Leica 50mm Summarit
    Leica 75mm 1.4 Summilux
    Leica 90mm Summarit
    Leica 90mm f2.8 Tele-Elmarit "Thin" version
    Leica Tri-Elmar 28/35/50




    Hotspot
    CV 15mm Heliar
    Zeiss 18mm
    Zeiss 21mm 2.8 Biogon
    Leica 24mm Asph
    Leica 28mm Cron
    Leica 35mm 1.4 asph
    Zeiss 50mm 1.5 Sonnar
    Leica 90mm 2.0 APO
    WATE
    Last edited by JimCollum; 15th February 2008 at 08:29.

  2. #2
    Workshop Member MikeScecina's Avatar
    Join Date
    Nov 2007
    Location
    Albuquerque, NM
    Posts
    103
    Post Thanks / Like
    Images
    21

    Re: Leica M8 & Lens listing: IR hotspot or not

    Oops...too bad Jack. I'll give you $475 for that 90.

  3. #3
    Sr. Administrator Jack's Avatar
    Join Date
    Oct 2007
    Location
    Los Altos, CA
    Posts
    10,486
    Post Thanks / Like
    Images
    1031

    Re: Leica M8 & Lens listing: IR hotspot or not

    Sheesh Mike, I can do better on eBay LOLOLOLOLOL!
    Jack
    home: www.getdpi.com

    "Perfection is not attainable. But if we chase perfection, we can catch excellence."

  4. #4
    Senior Member JimCollum's Avatar
    Join Date
    Oct 2007
    Location
    santa cruz, ca
    Posts
    936
    Post Thanks / Like
    Images
    155

    Re: Leica M8 & Lens listing: IR hotspot or not

    Quote Originally Posted by Jack Flesher View Post
    Sheesh Mike, I can do better on eBay LOLOLOLOLOL!
    besides.. Jack's a mono IR guy, he just has to choose the red or green channels

  5. #5
    Administrator Bob's Avatar
    Join Date
    Oct 2007
    Location
    Prescott, Arizona
    Posts
    4,492
    Post Thanks / Like
    Images
    367

    Re: Leica M8 & Lens listing: IR hotspot or not

    How about
    35 chron asph?
    WATE?
    -bob

  6. #6
    Senior Member JimCollum's Avatar
    Join Date
    Oct 2007
    Location
    santa cruz, ca
    Posts
    936
    Post Thanks / Like
    Images
    155

    Re: Leica M8 & Lens listing: IR hotspot or not

    haven't tried that one.

    i plan on testing as many as possible during the Moab workshop.. given the amount of glass that will be there, we should have pretty much everything covered

    jim

  7. #7
    Chris Herbert
    Guest

    Re: Leica M8 & Lens listing: IR hotspot or not

    I'll have those two with me, too, Bob! I suspect the WATE is okay, as LFI did a spread where it was used for IR (false color) and the shots looked beautiful.

    Chris

  8. #8
    Administrator Bob's Avatar
    Join Date
    Oct 2007
    Location
    Prescott, Arizona
    Posts
    4,492
    Post Thanks / Like
    Images
    367

    Re: Leica M8 & Lens listing: IR hotspot or not

    What is a quick test for hotspot or not?
    Wide open or fully stopped down?
    thanks
    -bob

  9. #9
    Administrator Bob's Avatar
    Join Date
    Oct 2007
    Location
    Prescott, Arizona
    Posts
    4,492
    Post Thanks / Like
    Images
    367

    Re: Leica M8 & Lens listing: IR hotspot or not

    p.s.
    I have it on good authority that Moab is NOT a hotspot

  10. #10
    Senior Member JimCollum's Avatar
    Join Date
    Oct 2007
    Location
    santa cruz, ca
    Posts
    936
    Post Thanks / Like
    Images
    155

    Re: Leica M8 & Lens listing: IR hotspot or not

    the more the lens is stopped down, the more visible the hotspot. as an example, the CV15 exhibits a hotspot, but you can use it fairly wide open with great depth of field, so it might not be apparent in a print

    jim

  11. #11
    Administrator Bob's Avatar
    Join Date
    Oct 2007
    Location
    Prescott, Arizona
    Posts
    4,492
    Post Thanks / Like
    Images
    367

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Leica 50mm Summarit - No Hotspot

  12. #12
    Super Duper
    Senior Member
    Terry's Avatar
    Join Date
    Nov 2007
    Location
    New York City
    Posts
    6,955
    Post Thanks / Like
    Images
    1145

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    90 Summarit is fine as well.

  13. #13
    Super Duper
    Senior Member
    Maggie O's Avatar
    Join Date
    Dec 2007
    Location
    Standards Are Down All Over
    Posts
    3,064
    Post Thanks / Like

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    What, exactly is the IR hotspot and how does it manifest in the files?

  14. #14
    Administrator Bob's Avatar
    Join Date
    Oct 2007
    Location
    Prescott, Arizona
    Posts
    4,492
    Post Thanks / Like
    Images
    367

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Maggie,
    an IR Hotspot will look like a hazy light blob in the middle of the image.
    It shows up more at small apertures with an IR-pass filter mounted on the lens (such as a B+W 092 or 093).
    If you look at the image in PS in the channels view, it is most visible in the blue channel, so one strategy to make it go away is to use only the red channel. Unfortunately, that limits you to a monochrome rendering unless you overlay with color from a non-ir filtered image.
    -bob
    Last edited by Bob; 15th February 2008 at 09:52.

  15. #15
    Super Duper
    Senior Member
    Maggie O's Avatar
    Join Date
    Dec 2007
    Location
    Standards Are Down All Over
    Posts
    3,064
    Post Thanks / Like

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Wow, interesting.

    I've been shooting the CV 15mm at f11, but haven't noticed it yet.

  16. #16
    Subscriber robsteve's Avatar
    Join Date
    Nov 2007
    Posts
    1,202
    Post Thanks / Like
    Images
    496

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Quote Originally Posted by Maggie O View Post
    Wow, interesting.

    I've been shooting the CV 15mm at f11, but haven't noticed it yet.
    Have you been shooting IR pictures with an IR transmitting filter in front of the lens?

  17. #17
    Super Duper
    Senior Member
    Maggie O's Avatar
    Join Date
    Dec 2007
    Location
    Standards Are Down All Over
    Posts
    3,064
    Post Thanks / Like

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Quote Originally Posted by robsteve View Post
    Have you been shooting IR pictures with an IR transmitting filter in front of the lens?
    Ah, so it only manifests when shooting IR with a filter?

    That would explain why I haven't seen it.

    Obviously, I am a complete idiot and possibly illiterate.

  18. #18
    Super Duper
    Senior Member
    Maggie O's Avatar
    Join Date
    Dec 2007
    Location
    Standards Are Down All Over
    Posts
    3,064
    Post Thanks / Like

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    BTW, could someone recommend a filter for IR work and where I could buy one?

  19. #19
    Administrator Bob's Avatar
    Join Date
    Oct 2007
    Location
    Prescott, Arizona
    Posts
    4,492
    Post Thanks / Like
    Images
    367

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Sure,
    Try a B+W 092. You can get them at BHPhotovideo.
    -bob

  20. #20
    Sr. Administrator Jack's Avatar
    Join Date
    Oct 2007
    Location
    Los Altos, CA
    Posts
    10,486
    Post Thanks / Like
    Images
    1031

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    the B+W 092 and the Hoya 72 are the same and will cover most of the lens sizes you are likely to need...
    Jack
    home: www.getdpi.com

    "Perfection is not attainable. But if we chase perfection, we can catch excellence."

  21. #21
    Super Duper
    Senior Member
    Maggie O's Avatar
    Join Date
    Dec 2007
    Location
    Standards Are Down All Over
    Posts
    3,064
    Post Thanks / Like

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Thanks, guys!

    I used to shoot a lot of B&W IR film with my Nikon and Konicas.

    Here's a sentimental favorite from 1982:


  22. #22
    Super Duper
    Senior Member
    Terry's Avatar
    Join Date
    Nov 2007
    Location
    New York City
    Posts
    6,955
    Post Thanks / Like
    Images
    1145

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Maggie,
    if you have a look in the Moab thread Guy posted an IR shot that clearly shows the hot spot. I can't link copy a link to it right now but head to like the 4th or 5th page and look for a B&W image with a clearly visible lighter circle dead center.

  23. #23
    Subscriber robsteve's Avatar
    Join Date
    Nov 2007
    Posts
    1,202
    Post Thanks / Like
    Images
    496

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    You can test for hotspots by shooting an evenly lit wall on an overcast day. To emphasize the hotspot, boost the contast to 100% and boost the blue channels when converting to B&W.

    Here is a test I made today of my 35mm Summicron ASPH. It has a hotspot.



    Of my lenses these have hotspots:

    24mm ASPH
    35mm Summicron ASPH
    19mm R (latest version)

    These two did not have hotspots:

    50mm Summicron-M
    50mm Noctilux

  24. #24
    Subscriber robsteve's Avatar
    Join Date
    Nov 2007
    Posts
    1,202
    Post Thanks / Like
    Images
    496

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Here is the Noctilux shot with the 093 filter, which only passes IR light. With some experimenting I found that most lenses needed the point of focus found by the rangefinder shifted to the f8 DOF scale mark. Using this, the Noctilux was still pretty sharp, even if shot at f1.2.

    This was shot at f8. Not the best picture, just from my backyard to test my lenses and focus.


  25. #25
    wilsonlaidlaw
    Guest

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Here is one with a 35 ASPH Summilux and 092 filter. Looks like no hotspot to me - what do others think?

    Wilson

  26. #26
    Administrator Bob's Avatar
    Join Date
    Oct 2007
    Location
    Prescott, Arizona
    Posts
    4,492
    Post Thanks / Like
    Images
    367

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    If this was taken with a small aperture, then it looks ok.

  27. #27
    wilsonlaidlaw
    Guest

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Quote Originally Posted by Bob View Post
    If this was taken with a small aperture, then it looks ok.
    Bob,

    From memory about f5.6 - the DOF looks about right for 5.6.

    Wilson

  28. #28
    fefe
    Guest

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    I have a hotspot on the 35 cron asph in IR, but that doesn't prevent me from taking pictures with it as it is not too strong

  29. #29
    Subscriber Member jaapv's Avatar
    Join Date
    Nov 2007
    Posts
    770
    Post Thanks / Like
    Images
    250

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    I find the Summaron 35/3.5 an excellent IR lens. In general I have the impression older lenses perform better for IR.
    For UV only old lenses are usable, for instance the Summarit 1.5/50 or a Jupiter, unless one wants to get into the specialty lenses.
    Plus- the IR focussing mark, which is missing on most modern lenses, is exactly at the 5.6 DOF mark.
    JAAP
    http://www.jaapvphotography.eu
    The colours of my generation are black and white.

  30. #30
    Subscriber robsteve's Avatar
    Join Date
    Nov 2007
    Posts
    1,202
    Post Thanks / Like
    Images
    496

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Jim:

    I tried my 135mm f4 tele-elmarit and there wasn't any hotspot.

    Is it possible we can keep a list of the good and bad lenses at the top of the thread?

    Robert

  31. #31
    New Member
    Join Date
    Jul 2008
    Posts
    15
    Post Thanks / Like

    M8 with CV 35mm 1.4 SC

    Just a very quick test (from a car window at red light), no spots

    M8 with CV 35mm 1.4 SC


  32. #32
    Senior Member JimCollum's Avatar
    Join Date
    Oct 2007
    Location
    santa cruz, ca
    Posts
    936
    Post Thanks / Like
    Images
    155

    Re: M8 with CV 35mm 1.4 SC

    Quote Originally Posted by jev View Post
    Just a very quick test (from a car window at red light), no spots

    M8 with CV 35mm 1.4 SC

    very nice!
    Likes 1 Member(s) liked this post

  33. #33
    Sr. Administrator Jack's Avatar
    Join Date
    Oct 2007
    Location
    Los Altos, CA
    Posts
    10,486
    Post Thanks / Like
    Images
    1031

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Jev, AWESOME first post! Welcome to GetDPI!

    Cheers,
    Jack
    home: www.getdpi.com

    "Perfection is not attainable. But if we chase perfection, we can catch excellence."

  34. #34
    roey
    Guest

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    No hotspot:

    CV 50mm 1.5 Nokton
    Leica 75 2.0 APO Summicron

    Hotspot:

    Leica 28 2.0 ASPH Summicron

    This one was taken with the Nokton and a B+W 093 filter:


  35. #35
    Senior Member
    Join Date
    Oct 2007
    Location
    Fort Collins, Colorado
    Posts
    2,077
    Post Thanks / Like
    Images
    1

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Quote Originally Posted by wilsonlaidlaw View Post
    Bob,

    From memory about f5.6 - the DOF looks about right for 5.6.

    Wilson
    Wilson

    I remember you well from the LUG. Welcome to GetDpi.

    Woody Spedden

  36. #36
    Super Duper
    Senior Member
    etrigan63's Avatar
    Join Date
    Nov 2007
    Location
    Earth, Sol System (near Miami, FL)
    Posts
    2,501
    Post Thanks / Like
    Images
    21

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    I just ordered a Hoya R72 for my Zeiss 21mm/2.8. I have a B&W 92 for my CV Nokton 40mm but I've been having trouble getting the conversions done right. I am trying to get the "white trees/blue skies" effect with no success. I usually just convert to B&W. Can I get some pointers on how to achieve that effect?
    Carlos Echenique | Carlos Echenique Photography |Olympus OM-D E-M1 MK II | Olympus Pen-F - M.Zuiko 17mm f/1.8, M.Zuiko 25mm f/1.8, M.Zuiko 45mm f/1.8, Rokinon 12mm f/2 NCS, M.Zuiko 75mm f/1.8, M.Zuiko 12-40mm f/2.8 PRO, M.Zuiko 40-150mm f/2.8 PRO

  37. #37
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,604
    Post Thanks / Like
    Images
    21

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Carlos,

    Start with setting the WB to incandescent on camera (this is helpful with metering as well).

    Next, you could use curves (middle dropper) to set the neutral area.

    Adjust hue.

    Use selective colors.

    There are many variables within the previous 3 steps. You need to figure them out after a bit of playing around and stick to it for a given effect and for a given lighting condition (major factor).

    Should you need any further assistance do not hesitate to drop me a line.

  38. #38
    Administrator Bob's Avatar
    Join Date
    Oct 2007
    Location
    Prescott, Arizona
    Posts
    4,492
    Post Thanks / Like
    Images
    367

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Leica 28mm chron ASPH - HOTSPOT

  39. #39
    Super Duper
    Senior Member
    etrigan63's Avatar
    Join Date
    Nov 2007
    Location
    Earth, Sol System (near Miami, FL)
    Posts
    2,501
    Post Thanks / Like
    Images
    21

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Quote Originally Posted by Vivek View Post
    Carlos,

    Start with setting the WB to incandescent on camera (this is helpful with metering as well).

    Next, you could use curves (middle dropper) to set the neutral area.

    Adjust hue.

    Use selective colors.

    There are many variables within the previous 3 steps. You need to figure them out after a bit of playing around and stick to it for a given effect and for a given lighting condition (major factor).

    Should you need any further assistance do not hesitate to drop me a line.
    M8 does not have incandescent. Can you give me a specific temperature?
    Carlos Echenique | Carlos Echenique Photography |Olympus OM-D E-M1 MK II | Olympus Pen-F - M.Zuiko 17mm f/1.8, M.Zuiko 25mm f/1.8, M.Zuiko 45mm f/1.8, Rokinon 12mm f/2 NCS, M.Zuiko 75mm f/1.8, M.Zuiko 12-40mm f/2.8 PRO, M.Zuiko 40-150mm f/2.8 PRO

  40. #40
    Administrator Bob's Avatar
    Join Date
    Oct 2007
    Location
    Prescott, Arizona
    Posts
    4,492
    Post Thanks / Like
    Images
    367

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Quote Originally Posted by etrigan63 View Post
    M8 does not have incandescent. Can you give me a specific temperature?
    If you have c1, you might start with 800 and -54,
    One other way is to use a white plastic sheet or an expodisk and set the WB to "manual", shoot through the expodisk to set the wb.
    You may have to fiddle with the ev (try -1) also.
    -bob

  41. #41
    Administrator Bob's Avatar
    Join Date
    Oct 2007
    Location
    Prescott, Arizona
    Posts
    4,492
    Post Thanks / Like
    Images
    367

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Leica 21mm Elmarit ASPH - NO HOTSPOT (but significant vignetting which is to be expeced)

  42. #42
    Subscriber robsteve's Avatar
    Join Date
    Nov 2007
    Posts
    1,202
    Post Thanks / Like
    Images
    496

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    The 24mm has a hot spot when shooting IR. I tested mine a few months ago. I don't think any of the modern ASPH lenses don't have a hot Spot.

    There is a thread at the top of this forum listing lenses and their compatibility with IR.

    Regards,

    Robert

  43. #43
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,604
    Post Thanks / Like
    Images
    21

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Quote Originally Posted by etrigan63 View Post
    M8 does not have incandescent. Can you give me a specific temperature?
    I did not notice this earlier. Try 3000K.

  44. #44
    Administrator Bob's Avatar
    Join Date
    Oct 2007
    Location
    Prescott, Arizona
    Posts
    4,492
    Post Thanks / Like
    Images
    367

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Or, just use the M8's Tungsten WB setting.
    yes, it does have one.
    -bob

  45. #45
    Super Duper
    Senior Member
    etrigan63's Avatar
    Join Date
    Nov 2007
    Location
    Earth, Sol System (near Miami, FL)
    Posts
    2,501
    Post Thanks / Like
    Images
    21

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Ooh good guess on my part! I did try with the Tungsten setting and here is what I got:



    What could I do to improve this?
    Carlos Echenique | Carlos Echenique Photography |Olympus OM-D E-M1 MK II | Olympus Pen-F - M.Zuiko 17mm f/1.8, M.Zuiko 25mm f/1.8, M.Zuiko 45mm f/1.8, Rokinon 12mm f/2 NCS, M.Zuiko 75mm f/1.8, M.Zuiko 12-40mm f/2.8 PRO, M.Zuiko 40-150mm f/2.8 PRO

  46. #46
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,604
    Post Thanks / Like
    Images
    21

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Carlos,

    You could try this (photoshop)

    1. Selective color-

    ->Magenta ->slide magenta to -100
    ->Blue -> slide Yellow to +100
    ->Black -> slide Black to +35

    2. Saturation

    -40

    3. Shadows/Highlights

    Highlights to 70%

    This starts to look with little magenta.

  47. #47
    Super Duper
    Senior Member
    etrigan63's Avatar
    Join Date
    Nov 2007
    Location
    Earth, Sol System (near Miami, FL)
    Posts
    2,501
    Post Thanks / Like
    Images
    21

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Here is the result:



    Looks much better!
    Carlos Echenique | Carlos Echenique Photography |Olympus OM-D E-M1 MK II | Olympus Pen-F - M.Zuiko 17mm f/1.8, M.Zuiko 25mm f/1.8, M.Zuiko 45mm f/1.8, Rokinon 12mm f/2 NCS, M.Zuiko 75mm f/1.8, M.Zuiko 12-40mm f/2.8 PRO, M.Zuiko 40-150mm f/2.8 PRO

  48. #48
    Super Duper
    Senior Member
    Vivek's Avatar
    Join Date
    Apr 2008
    Location
    Netherlands
    Posts
    13,604
    Post Thanks / Like
    Images
    21

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Thanks for posting it Carlos.

    (I don't like to post modified images of others, even when asked).

  49. #49
    Workshop Member Joseph Ramos's Avatar
    Join Date
    Nov 2007
    Posts
    456
    Post Thanks / Like
    Images
    12

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Anyone know if the 12mm Voigtlander has IR hotspot?

  50. #50
    Subscriber robsteve's Avatar
    Join Date
    Nov 2007
    Posts
    1,202
    Post Thanks / Like
    Images
    496

    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Quote Originally Posted by Joseph Ramos View Post
    Anyone know if the 12mm Voigtlander has IR hotspot?
    I think Guy used one in Moab last year and there was a hot spot.

    Robert

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •