I have the 85/1.4 AIS, always wondered about the 105/2 DC, more than the obvious that is an AF, how does this lens work with the 2 apperture rings, I'm sure there are more technical names for the front ring..
I have checked the price list and both in the AF version seems to have the same price tag. Worthwhile upgrading to an AF version?
#1. "RE: 85/1.4 vs 105/2 DC" | In response to Reply # 0frankie Basic MemberTue 12-Sep-00 12:49 PM
If I'm not mistaken, the lens works by having a translucent front diaphragm.
It's modeled after the old "variable diffusion disks" which I own, where mine is basically a filter with "onion skin" like aperature blades that open and close infront of a glass filter.
Mine is pretty lousy, being older than me and not treated well (at 2$ the price was right).
I question Nikon charging so much though for a lens like that...
It's not a big seller so it's priced rather high.
The 85 1.4 is a wonderfully versatile lens. You could always go and purchase soft-disks for it and you might even be able to get a converted Hassleblad variable-diffusion filter (like what I have) for use on threaded lenses. Either way, you'd save a heck of a lot and still have a pin-sharp lens.
Besides, wide open, the 85 is a tad on the soft side anyway...
#2. "RE: 85/1.4 vs 105/2 DC" | In response to Reply # 1vfnewman Basic MemberTue 12-Sep-00 01:54 PM
Frankie and Patrik,
The 105 f/2 (and 135 f/2) DC lenses are able to shift some of the elements in the lens and alter the magnitude of under/overcorrection to the spherical abberation. The "defocus" effect can be selectively emphasized in the foreground or background by how one sets the Defocus Control (DC) ring.
I'm reaching into memory here, but as I recall, the DC ring is graduated in two sequences of f/stops, like an aperture ring, with a sequence marked "front" and the other marked "rear". When the DC ring is set to the neutral (middle) position the DC system has no effect. If the DC ring is moved to some other postions, as long as the f/stop on the DC ring is less than what the lens is set to, the focused image is supposed to stay tack-sharp, and the DC setting only modifies the appearance of the background or foreground, as appropriate. Once the DC ring is turned past the aperture set on the lens, it takes on a "soft focus" effect on the subject, but the image is supposed to have a sharp core surrounded by the defocused "halo", giving what Nikon says is an "ideal" soft-focus rendering of the subject.
As far as I know (and I don't own either lens) there is no translucent aperture or diffusion disk involved in these lenses. There are some pictures on the web of the effects of the Nikon "Defocus Control" system, but I can't remember where they are right now. You might find some on an official Nikon site.
#4. "RE: 85/1.4 vs 105/2 DC" | In response to Reply # 2Patrik Basic MemberWed 13-Sep-00 11:50 AM
as always you seem to have the knowledge..
Thanks for sharing with the rest of us that don't!
Seems that the answers I have gotten so far leans towards the 85mm that I have, have anyone tried the AF-D versions feel when focusing manually. Asking since shooting, I tend to have my F3 as B/W body while the F5 is colour.