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

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  1. roywez67

    sigma choice

    thanks , i just needed an insight with not using any dslr or lens before, it will be for birding , i do a lot of walking around as appose to sitting and waiting, so i think something that can reach to 500mm would suit best, thanks again.
  2. roywez67

    sigma choice

    hi, anyone got any opinions on the sigma 170-500 apo af, and the sigma 70-300 apo dg i am due to buy a 55d in the next week was thinking of either one of these two, some good advice would be appreciated and maybe any alternatives , i should say this will be my first dslr after using bridge...
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