guys what is it called? it is the feature in the camera, where you focus on the closest and the most distant point you want to keep in focus, and the camera works the aperture needed itself?
and anyone knows if Nikon D300 has got it?
many thanks:thumbsup:

Depth of field is a function of lens focal length, lens aperture and sensor size. I'm not sure any camera has it as a "feature" as such. Some lenses, usually primes have depth of field scales on them so you can work out what the depth of field will be for any given aperture.

This should explain it DOF (http://www.dpreview.com/learn/?/Glossary/Optical/Depth_of_Field_01.htm)

guys what is it called? it is the feature in the camera, where you focus on the closest and the most distant point you want to keep in focus, and the camera works the aperture needed itself?
and anyone knows if Nikon D300 has got it?
many thanks:thumbsup:
All cameras have it,if you can work it out.Try this Nikon D300 is there and many others.
http://www.dofmaster.com/dofjs.html

My old EOS 300 had this mode - I think it was just called Depth of Field Optimisation or something - you focussed on the nearest point, then the furthest point, and it set the appropriate aperture for you. It all seemed much more complicated than just using the preview.

I doubt a semi-pro spec camera like the D300 will have it, but I guess it has got depth of field preview via the viewfinder and (zoomable) on the screen, so you can check it that way.

The D300 has a Depth of Field preview button. The user manual is here (http://www.nikonusa.com/pdf/manuals/noprint/D300_en_noprint.pdf) (15.5 MB download !) - have a look at pages 105, 298 and 306 for details :thumbsup:

My old EOS 300 had this mode - I think it was just called Depth of Field Optimisation or something - you focussed on the nearest point, then the furthest point, and it set the appropriate aperture for you. It all seemed much more complicated than just using the preview.

I doubt a semi-pro spec camera like the D300 will have it, but I guess it has got depth of field preview via the viewfinder and (zoomable) on the screen, so you can check it that way.

yes mate, that's what I meant. surprising that not many people heard about it though... i thought it might be nice and fast feature with very accurate results. with the DOF preview button, when set to small aperture, it might look quite dark, especially in lower light conditions I think...

If you are referring to hyperfocal distance, you can work this out with a calculator and use manual focus - the image may look a little blurry through the viewfinder but will come into focus when the aperture stops down to take the picture, but the DOF preview button is the most common way

just found this - is this what you are looking for?
http://www.dofmaster.com/hyperfocal.html

If you are referring to hyperfocal distance, you can work this out with a calculator and use manual focus - the image may look a little blurry through the viewfinder but will come into focus when the aperture stops down to take the picture, but the DOF preview button is the most common way

As you say DOF preview is the best way, but the EOS300 used to do it for you - you just gave it two points, and if it could make them both be in focus it would.

The EOS 300 was my only Canon product - I assumed it was on all of them, but perhaps not!