DPReview.com is closing April 10th - Find out more

DOF for SX730

Started Apr 1, 2018 | Discussions thread
saaber1 Senior Member • Posts: 2,164
Re: DOF for SX730

I didn't actually look at any of that data for now due to time constraints but I just wanted to pass along that the DOF equation is limited in it's applicability. For example macro shots of 2 cm distance to subject or whatever will give you whacko #s.

In regards to that equation, perhaps it's best to stick to distances like 10m from your graph on the other thread.

The cambridge in color calculator is a nice calculator in that it takes into account viewing distance, print size etc. They have some nice info. on DOF too. Also FYI there was some great discussion on DOF, sensor size, etc. on dpreview recently (I need to find that thread again).

Here is an example of the cambridge calculator for the sx730 at 10 m distance to subject, fully zoomed in (note that 6.6 is the max aperture of the sx730 at 172mm (960mm equivalent) but the calculator does not have "6.6" so I selected "5.6".). The numbers sound right to me, about 8.3 inches depth of field (actually it should be larger due to selecting 5.6 as aperture when it should be 6.6).

For reference, the bottom image is the same distance, focal length, aperture using a full frame camera. Note that "focal length" for this particular calculator is in actual focal length, not "full frame/35mm equivalent" focal length. Again the 1.6" ish DOF sounds about right to me.

sx730

Here is the cambridge in color link FYI:

https://www.cambridgeincolour.com/tutorials/dof-calculator.htm

Post (hide subjects) Posted by
(unknown member)
(unknown member)
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow