i would thought a shading system to block sun rays but allow air flow would be the most effective but a littl silly looking if its a samll tent above the scope
any chance of a look at the scope if your at CGC thursday again ..always interested at looking at new Glass
i always left my leups to aclimatise for 1hr before hitting the zero range at a shoot ... never had the problem with the Deben or Hakkos tho
maybe these high quality scopes have metal internals which will react more to heat on expansion than cheaper plastic ones ?????