The Lensbaby Sweet 35 Optic ($180 direct) is the widest available lens for the Lensbaby system. It produces a 35mm field of view on full-frame cameras, and is compatible with most Lensbaby lens bodies that support the optic swap system. These include the Muse($112.00 at Amazon) and Composer Pro. It will fit in the Spark($140.01 at Amazon), but due to the weight of the optic it is not something that Lensbaby recommends you do—the Spark's plastic construction just isn't up to the task. The Sweet 35 is like other Lensbaby lenses in that it is able to capture a sharp "sweet spot" of focus, surrounded by blur. When used in conjunction with the tilting mechanism of the Muse or Composer Pro( at Amazon), this spot can be moved around your frame, allowing you to focus on a subject at the edge or corner while leaving the rest of the frame blurry. It costs twice as much as the standard Double Glass Optic( at Amazon), but offers some improvements to justify that. The internal aperture featu...
The Lensbaby Sweet 35 Optic produces a wider field of view than standard Lensbaby lenses, and offers internal aperture control.
Wide field of view; Internal aperture control; Compatible with Lensbaby lenses
Expensive; Awkward to use with Muse lens