It’s hard to know what focal length lens you should buy, especially when budgets are tight. Who wants to go back to the boss to tell him they bought the wrong one?
That’s why lens calculators are so useful. The best-of-the-best I directed you to back in November ’11 (“Advice on lens selection”), but some simple, on-line calculators (no download required,) can be found at the website of German lens specialist Lensation.
Focal length, depth of field: Lensation has ‘em all, so take a look and bookmark the page.
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