DSLR Camera Initialization

[wtgee]

• When setting default properties of the Canon camera, use the values rather than the index settings, which seem to be more consistent across models.
• Don't double quote the radio option values.

Closes #1251

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 70.21%. Comparing base (b93d547) to head (ff76195).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #1252 +/- ## =========================================== - Coverage 70.22% 70.21% -0.02% =========================================== Files 100 100 Lines 8399 8399 Branches 1164 1164 =========================================== - Hits 5898 5897 -1 Misses 2352 2352 - Partials 149 150 +1 ```

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