My 24 Inch Artar was lost during the shipment on its way to get a shutter mounte d on it last week. I also have artars of 450mm and 19 inche and I like the image s they produce. I also happen to have a 60cm F:9 Carl Zeiss Tessar lens in barre l. It's big and heavy, not coated. I have never got a chance to test or use it. Now my question: Anyone out there have experiences with these two lens? How do t hey compare in performance? I shoot 8x10 B&W landscapes and contact print only. I need to make a decision as whether to get a shutter mounted on the Zeiss or g et another artar. Thanks alot!