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

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    Vortex Razor HD 13-39 x 56 - first impressions

    Bear with me.... I sold it pretty quickly after buying it, because I wanted a bit more more light gathering. So I bought an ex-demo Opticron MM4 60mm instead - which is full circle to a year ago, when I also owned the Opticron, but then got carried away with an upgrade (Kowa TSN-773) that I...
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    Vortex Razor HD 13-39 x 56 - first impressions

    Not sure about worldwide, but it was only released in the UK on 23rd August 2023. .
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    Vortex Razor HD 13-39 x 56 - first impressions

    PPS. I forgot to mention colour fringing... probably because I wasn't aware of any when I first tried the scope. Having now looked a little more critically, there is the tiniest hint of green and purple fringing against very high contrast edges, but only at the edges, with the centre being - to...
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    Vortex Razor HD 13-39 x 56 - first impressions

    PS. I forgot to mention that another reason for me to go from a 77mm scope to a smaller one, was close focus, so that I can observe insects more easily. Also, the scope is dark green - it looks grey in the photo above, which is too late to edit.
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    Vortex Razor HD 13-39 x 56 - first impressions

    Just bought a mint used Vortex Razor HD 13-39 x 56 and these are my first impressions. Context: I started out a couple of years ago with an Opticron MM4 60mm, then moved to a Kowa TSN-773. I found I wasn't using a scope very much, so I sold it, bought a used Opticron MM4 77mm and bought some...
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