Tom
I think the Nikon CU lens that Doris speaks of is one of the T series.
These come in 2 filter sizes and 2 strengths. The 3T and 4T are both 52mm
and roughly +1.5 & +3 respectively, and the 5T & 6T are both 62mm and +1.5
& +3 respectively.
These are very high quality 2 element CU lenses designed specifically for
use with lenses in the 80 to 200mm range. Basically they allow any lens,
macro or non-macro to focus closer. They should not be confused with the
cheaper single element CU lenses usually sold in a set of +1, +2 & +3,
which are optically inferior and mostly designed for use with lenses around
50mm.
I use the 4T with a 49mm to 52 step up ring, with my 85f2, and Tamron
90f2.5 (49mm version). I have recently discovered that it does not
vignette with the 90f2, using a 55mm to 52mm step down ring, but have not
had a chance to do any comparison testing.
These are great lightweight alternatives to extension tubes whilst still
maintaining high quality.
Cheers
Ross Waite
On Sunday, January 30, 2000 5:39 PM, Tom Scales
[SMTP:tscales@xxxxxxxxxxxxx] wrote:
> OK, ignorant question mode. One of the things I just discovered I owned
(in
> the bag of a kit I bought) was a Nikon CU filter. Oddly, it also seems to
be
> a 49->55 stepup ring at the same time. Is that possible? Actually, the
> question is, what's the effect of the CU? The seller also included a set
of
> Hoya +1,+2,+4, so he must have been doing some closeup work (the
detective,
> if you remember the story, you have to wonder what he was taking pictures
> of).
>
> Thanks.
>
> Tom
>
> >
> <snip>
>
> > For flowers ? A Nikon CU lens. Polarizer (maybe a bicolor Y-B?). 81C.
> > Small flash with remote cord, several small reflectors, a piece of
> > Bisqueen to create soft lighting. Okay, that was 7-10, and I'd also
throw
> > in a Singh-Ray GND and a few small bungees to hold back things that get
> > in the way. Ok, that's 8...I'll stop there. A gel filter or two to put
> > over the flash, one simulating bluish shade light, the other a warm one
> > (so you can use the flash in a more natural way.
> >
> > > What do you want to brag about that has petals.
> >
> > I have this killer Cannondale MTB with XT components...oops,
> > you said PETALS...
> > *= Doris Fang =*
> >
>
>
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