Posted by Tony T on 11-04-2008 12:49
#8
conopid wrote:
What kind of magnification do you think you are achieving in the full size file ?
Hi Nigel:
Didn't record the mag. in this instance, and I don't have the mosquito.
I have a Nikon PB-6 bellows. The literature that came with the AF 28mm f2.8D Nikkor lens gives a mag. range of 3.2-7.6 when reversed on the PB-6, and a field size getting down to 3.2x4.7mm.I believe these data are based on the full-sized sensor in regular SLR's; possibly need to increase the mag. range by 1.5 to acount for the smaller sensors in most DSLR's.
A wider angle lens, e.g., 24mm will give even greater mag.; a longer lens, e.g., 50mm will give less mag.
Also, using the 28mm in the normal position on the PB-6 will give mag. from 1.7-4 (again I guess with a full-sized sensor).
At these mags. depth of field is almost non-existant; had to use many images and stack them with Helicon Focus.