I am rather intrigued about Zeiss's Tessar and Planar lenses, mainy because these designs are so (if you pardon the pun) Iconic. The one thing that puzzles me is that whilst the Tessar was advertised as 'The Eagle eye of your camera' and Zeiss's logo is derived from the Tessar's optical layout, the Planar, is considered by many people to be the 'better' of the two lenses. However, whilst ruminating over this subject, I discovered that the Planar, prior to and for some time after multi-coatings started being used, (yet another Zeiss '1st'!) suffered from flare which also reduced it's contrast. On the other hand, the Tessar, had a reputation for it's extremely satisfying levels of contrast. I think I am right in saying that the Planar delivers higher levels of resolution than the Tessar and is considered the more desirable because it also f1.8 rather than f2.8 optic. However, I wonder which of these lenses produces the 'better' image, when used at say, f8?