buying Extension Tube Sets help

[redline]

what thinking of buying one of those kenko extention tube sets to help focus close for product work.
i pretty much have nothing for close-up work besides the pb5 but it hasn't help for close up work, extreme close yes.
i was also thinking of buying the 105 f/4 mirco with pn11 for about 200usd
is there much advantage buying the nikon lenses combos?
or just buy the tube set and use my 105 f/2.8 lenses? since my minimal focus was 1meter can i work out the effect of the tube.

[petal666]

I'd say tubes are not a good idea. While they bring the min focus in a bit (lot), they result in very shallow depth of field.

[NikonUser]

Doesn't depth of field totally depend on the magnification factor?

IE.... no matter what setup you use DOF will be the same for the same appature at the same magnification?

I could be totally wrong here so feel free to correct me. I read it somewhere.

Paul

[MHD]

To a certain degree yes... but my macro lens can go to f/32 (more at higher mags)

[redline]

well i guess a bellow on lowest settings would kinda be like a extention tube right?

[NikonUser]

Yes it would.... but you would have a rather dim image in the viewfinder... and I don't think you can use metering in camera with bellows can you?

[redline]

well no metering.