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

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  1. H

    The Zeiss SFL 8x30 compared with select current 8x30/8x32 roof binoculars

    It would be great if Zeiss could publish exact values here. Every camera lens comes with a precise specification of its distortion curve, so why do they make such a secret out of the same thing when it comes to binoculars :confused: Cheers, Holger
  2. H

    The Zeiss SFL 8x30 compared with select current 8x30/8x32 roof binoculars

    Thank you, Canip, for this verification of the magnification. Zeiss will have to explain these data, since they seem to (mildly) contradict their claim that the 8x30 has a k-value close to 0.7. Certainly, k ~ 0.55 is not that far off in terms of overall distortion, but the difference should be...
  3. H

    The Zeiss SFL 8x30 compared with select current 8x30/8x32 roof binoculars

    The k-values, as calculated with the official specs, do indeed vary, being about 0.55 (8x30), 0.7 (10x30), 0.75 (10x40) and 0.8 (8x40). This seems to collide with the information I received from Zeiss, according to which the SFL binoculars 'have been designed to closely follow the k = 0.7...
  4. H

    The Zeiss SFL 8x30 compared with select current 8x30/8x32 roof binoculars

    Right, there is this Leica patent for a digital binocular with variable distortion. Hopefully, they are going to make use of this idea ... Cheers, Holger
  5. H

    The Zeiss SFL 8x30 compared with select current 8x30/8x32 roof binoculars

    Hi Brock, I think I remember discussions on cloudynights.com about the Nikon LX and its globe-effect under the night sky ('crystal ball'). Later, with the EDG, they got it right, I guess. The Nikon 10x50 WX is sharp almost to the edges and still offers a perfect distortion curve. Probably the...
  6. H

    The Zeiss SFL 8x30 compared with select current 8x30/8x32 roof binoculars

    As far as I know, all the SFL models are supposed to have distortion curves which kind of 'follow my prescriptions'. What this means precisely I have no clue, because Zeiss has not shown me their distortion curves and just mentioned it in passing. I have once seen the 8x40 SFL and the panning...
  7. H

    The Zeiss SFL 8x30 compared with select current 8x30/8x32 roof binoculars

    Dear Canip, Yes, so, after all, the 'Merlitz distortion' does in fact work out. I should get one of these SFL for the simple reason that their distortion curves were intentionally designed for smooth panning - quite amazing to realize how long it took until the panning (which is such a common...
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