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-   -   zoom into a wide? (https://www.dvinfo.net/forum/alternative-imaging-methods/78111-zoom-into-wide.html)

Christopher Witz October 24th, 2006 07:06 AM

zoom into a wide?
 
Just a thought......can someone do me a favor? can you put a wide angle adaptor ( like a .5 ) onto your camera ( without dof adaptor ) and zoom into it and see if the dof is less than the same focal length as without the .5 on?

imagine if it was?..... put a .5 ( or any wide add on lens ) on, zoom in, and whalla! shallow depth of field!

If not.... my bad. ( had a dream last night that it did work... and all the dof adaptor makers ganged up on me and flogged me with a giant spagetti noodle )



ciao!

Toenis Liivamaegi October 24th, 2006 11:23 AM

Once I had that same dream...
... but no, it wouldn`t work.

DOF for any given focal lenght and aperture will be the same and only depends on the imaging sensor size be it 1/4", 1/3", 2/3" etc the bigger the shallower the DOF just as in digital photography where compact cameras donn`t have depth of field.

See here http://www.mediachance.com/dvdlab/dof/index.htm

T

Frank Hool October 24th, 2006 12:06 PM

also have a look on this:
http://en.wikipedia.org/wiki/Circle_of_confusion

virtually such adapters work like image plane converters.


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