David Richardson wrote:

> Hello all, Years ago when one was more active in the
> photographic sales game, there were external filters that
> could provide a wide perspective for some optical
> systems. My tl-120 is nice but the chance to have an
> added optic that would widen perspective would make me
> use it more often than the twinned matched lens of a 35mm
> dual array where lenses are interchangable. Has anyone
> found a widening "filter" useful on the Chinese
> tri-lenses.

I certainly wouldn't call them "filters", they are
supplemental lenses. I know some here have experimented with
them and been satisfied with the results. I purchased a pair
of multi-element, coated add-on lenses to try with my
TL120-1 and sold them without ever using them with it. I
tried them out on my DSLR and was so disappointed with the
results that I gave up on them and sold them at a deep discount.

Take a look in the group archives back in July, 2007 for a
discussion with the subject of "Wide angle coke bottles".
Look in the archives of sell-3d in January of 2009 for my
"FS" listing for them.

I finally gave up on the coke bottle route and installed a
pair (well, three) Mamiya C330 55mm lenses to make my
Tl120-55 wide angle camera. I am aware of at least six other
TL120-55 cameras. Just yesterday, I got to see an image made
with a pair of Mamiya C330 65mm lenses and was very pleased
with the image quality. I am not aware of ever seeing an
image from a coke-bottled TL120-1.
--
John Thurston
Juneau Alaska
http://stereo.thurstons.us