Amigos,
My opinion on WA lens choices is this:
* If you absolutely NEED or WANT the full 10mm of the popular Tokina 10-17mm lens then Bill's dome is tops...........Preset the lens at 10mm and go for it......But zooming the Tokina in to about 11-12mm in the standard Ikelite dome isn't bad either....
* The popular Sigma 15mm Fisheye on a cropped sensor SLR like the Canon Rebel SL1 / 100D is still very nice too........A friend will be shooting his Sigma 15mm in the Philippines on his Canon SL1 early September.
* The Canon 8-15mm F4L lens is super spectacular and can be used in the Ikelite dome preset at one focal length......I shot it at 12mm in the Ikelite dome and was very happy with the results. Bill may make a "tuned" version of his dome for this lens too.
* Finally, the inexpensive Canon 10-18mm IS STM rectilinear lens will be a great choice for Canon Rebel SL1 / 100D shooters..........It's a great surface lens and while not as wide as the fisheye choices will work well for land and UW shooters wanting to own one WA lens.....
Sample pics below from some of the fisheye choices.........First 4 pics Tokina 10mm in Bill's dome, then Sigma 15mm Fisheye (1 shot) and then a Canon 8-15mm Fisheye at 12mm (1 shot).
Also some more photos at this link. Same group of WA lenses and even some Canon 18-55mm IS STM "kit" lens shots.......A darn capable little camera....
http://www.ikelite.com/support/galleries/canon-100d-david-haas.html
dhaas





