Although the Canon 24mm F1.4L and Samyang 24mm F1.4 are superb lenses, the Canon is $1500 and the Samyang $800. Here EOSHD goes hands-on with 4 more affordable fast wides for the 5D Mark II. They are especially cheap if you pick them up used on eBay.
Pictured: Unique-in-the-world (factory custom job) Iscorama with aspherical elements from a Leica Sumicron.
More: anamorphic treasure on Flickr
Buy: 72mm Tokina +0.4 Diopter on eBay from a London based cinematographer
Diopters or achromats dramatically improve the sharpness and minimum focus distance of anamorphic lenses.
A Tokina double element diopter has transformed my Isco Centavision anamorphic to the point where it rivals the Iscorama 36 for sharpness. It has halved the minimum focus distance of the lens from 2 metres to 1.