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

  1. #51
    Workshop Member Woody Campbell's Avatar
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    The Tri-Elmar classic has no hotspot at any focal length. Infinity focus at about the f4.0 depth of field mark.

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

    Just got Avenon 21mm f2.8 from Japan (i think it was branded in US a Kobalux)
    Became my favorite lens for IR work, no hot spots or flare

    here is a sample
    Calchaquíes Valley, Salta Argentina (infrared)


  3. #53
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Here's one with the CV 15/4.5 Superwide @ f4.5.

    I just held my 52mm Hoya R72 over the lens. Wide open = no hot spot:

    Last edited by Lloyd; 5th March 2009 at 16:41.

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    Workshop Member Woody Campbell's Avatar
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    24 mm Elmar 3.8 No hotspot. Infinity focus is between f4.0 and 5.6. Slightly soft at 3.8 - very sharp at 5.6. Very good IR lens.

  5. #55
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Hi All,

    What I am finding both from my brief experience with the M8 and Hoya R72...is that with the R72 specifically, one cannot get the "white trees/blue skies" effect that Carlos was able to demonstrate. Carlos, I presume you got that effect (the one you showed in your two posted images) from your B&W 092 filter, not R72. It seems for false color IR, the B&W 092 lets in far more visable light (along with UV) than the Hoya R72. With the R72, color images are predominantly red/magenta and no amount of photoshop adjustment so far has been able to give me blue skies (and magenta or white leaves)...nothing even close. Both filters are excellent for B&W IR, with the R72 having a bit stornger effect. B&W's 093 filter lets virtually no visable light in...so almost no false color with color IR images...but sticking black skies with B&W IR.

    Carlos (and anyone else)...have you been able to get blue skies/white leaves effect with the M8 and R72...or just using a B&W 092 with your M8?? I want to confirm this. Thanks!

    Dave (D&A)

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

    Here is why "hotspots" are there:

    http://nikongear.com/smf/index.php?topic=17711.0

    Check your lenses under IR light and it will easy to figure out which one to use and which one to avoid.

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

    Summilux 35 pre-asph - no hot spot w/ R72.
    My Photography Blog here

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    IR temp question for experts

    Does temperature affect the images with say an M8, tungsten WB setting, and a Hoya R72 filter, on a lens without hot spots?

    For example, say a landscape scene with both live and dead foliage, sky is exactly same grey. Would a temp of 10 deg. F look different than one at 30 deg. F. assuming moisture levels are the same?
    My Photography Blog here

  9. #59
    Larry 47
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    I just received a Zeiss 25mm f2.8 Biogon for my M8.2. I tested it with my Hoya R-72 Filter. No hot spot. Very sharp at f5.6. Excellent results at ISO 320 +2/3 EV.

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

    Cv 35mm Nokton f/1.4 MC has a hotspot @ f/8. I will have to try at more wide open settings. Still it is very manageable.

    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

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

    Carlos, that is a beautiful image. How is the IR mark on the CV 35, or is there one? I've found the IR focusing marks on the Canon 28/2.8, and Hexanon 28/2.8 to be very accurate with the R72 filter.
    My Photography Blog here

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

    It's actually pretty mild, but there nonetheless. I find it less noticeable with a B&W 092 vs a Hoya 72 despite that those filters are supposed to be identical. (yes, I have both filters) The lens does not have an IR mark so i guesstimate using the right f4 mark on the barrel.
    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

  13. #63
    Senior Member thrice's Avatar
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    I would love to see how bad some of the hotspots are, particularly 18mm distagon, 35 lux asph and 50/1.5 sonnar. Otherwise I'll post when my IR filter arrives next week.

  14. #64
    Senior Member thrice's Avatar
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    No hotspot with the 50 Sonnar wide open.


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

    No hotspot with the 50 Sonnar at f/5.6:





    Who did the original tests?

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

    18mm distagon certainly has a hotspot around f/11. Closer to wide open not really an issue.

  17. #67
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Anyone tested a CV 28 3.5 lens for hot spots ??

    Seems like a perfect compact kit on a M8.

  18. #68
    Senior Member thrice's Avatar
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Here's a ZM 35 f/2.8 C-Biogon, no hotspot. The colour shift is from manual WB and in-camera jpeg.



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

    Quote Originally Posted by thrice View Post
    Here's a ZM 35 f/2.8 C-Biogon, no hotspot. The colour shift is from manual WB and in-camera jpeg.
    Those are sweet, Daniel.

  20. #70
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Quote Originally Posted by Lloyd View Post
    Those are sweet, Daniel.
    It's great that with the M9 hand-holding IR is still (kinda) possible these were 1/8s wide open.

    I'm gonna go on an IR adventure tomorrow with my tripod I think

  21. #71
    Senior Member thrice's Avatar
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    The 18mm Distagon doesn't have a hotspot. It does however, have some crazy internal reflections I could really do without! I'm going to test various apertures and see if it's not evident at any particular setting. It's probably fine on the M8.

    This is at f/11 on the M9


  22. #72
    Senior Member thrice's Avatar
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    The 25mm Biogon on the other hand is causing some intense internal reflections! I don't know if this is because of the non-multicoated filter I'm using, but given that it's quite rectangular I'd say it's bouncing off the sensor at some stage. The problem gets worse stopping down, this is at f/8.0:


    I have the hood on the lens, and no light is hitting it at an extreme angle. I even tried further shielding the lens with my hand but no go. It also occurs regardless of what direction I'm shooting in relation to the sun.

    The reflection itself is normally blue, I just have a channel swap as part of my post processing for IR.

  23. #73
    Senior Member thrice's Avatar
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    My 25mm Biogon is faulty, I've now tested it with an 8s exposure with a lens cap on while turning it around under bright sunlight and I get the exact same shaped flare however with the rest of the image being black. Off to Zeiss it goes I guess.
    Last edited by thrice; 19th April 2010 at 20:39.

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

    No hotspots:

    28mm/2.8 Elmarit ASPH *
    50mm/2.0 Summicron IV (tab version)
    90mm/2.8 Tele-Elmarit

    * Hot spot only showed up on one image when shooting into the sun at f/22. All other images were fine in normal circumstances.

    Filter used:
    B+W 39mm 092 F-Pro

    Body: M8.2

  25. #75
    eawtan
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    No hotspots:
    CV 25/4 snapshot skopar (ltm)
    Leica 40/2 Summicron-C


    Filter used : R72

  26. #76
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Leica Summicron-C 40/2 , M8 R72 . 32s f16 . No hotspot.

    Likes 1 Member(s) liked this post

  27. #77
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Quote Originally Posted by eawtan View Post
    Leica Summicron-C 40/2 , M8 R72 . 32s f16 . No hotspot.

    Gorgeous shot!! Is that 32 seconds?

  28. #78
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Quote Originally Posted by Lloyd View Post
    Gorgeous shot!! Is that 32 seconds?
    Thanks, and yes it is 32 seconds. (tripod mounted)
    ISO160 , a few mins after sunrise

  29. #79
    KieraH
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Awesome pic

  30. #80
    eawtan
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    canon 50 f1.2 (ltm) hotspot visible at smaller apertures (f8 and smaller )

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

    The little CV 25mm f/4 Skopar used to be my favorite lens for IR on the M8.

    Last edited by scho; 13th April 2012 at 06:44. Reason: typo
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  32. #82
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Very kewl, Carl. Love that one. Was this taken with the M8?

  33. #83
    eawtan
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Canon 50mm f1.2 LTM (at f22 or f16) -- obvious hotspot.
    Not so obvious from f1.2 to f8.


  34. #84
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    35 lux FLE definitely has a hot spot.

    21/3.4 Super-Elmar does not.

  35. #85
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    Re: Leica M8 IR-Compatibility Lens listing: IR hotspot or not

    Thread-resurrection!

    I get a hotspot most of the time when using my CV35/1.4 Nokton MC and a B+W 092 filter

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