Skeeter, that is a good point I didn' t even really consider. Looks like that one has been swiped off the list....I saw that Swaro' s have a working temp. of -20 deg. No good for Alberta weather. Schmidt & bender has 30mm dia tube (not what I want). Looks like I' m still torn between the Leupold and Conquest. This is a harder decision than I thought it would be. " Doc"