My new APS-C normal lense...

This is of course completely crazy, and I didn't buy it to use it on a APS-C size DSLR, but I thought it was quite funny that the Fish-Eye-Takumar 6x7 1:4.5 35mm is just a very heavy (almost one kg without the adapter) normal lens on my DSLRs. It is an impressive lens, 11 lens elements in 7 groups with four built in filters and a front diameter of about 80mm, which covers 180 degrees on the 6x7 format.