_____LF Trioplan! Some questions..

Hello, friends!

I for a long time searched for myself fast portrait lense with a

simple design. Trioplan has most approached under characteristics. I

searched Portrait-Trioplan, but unsuccessfully... Also has found in

Siberia in Russia at the descendant of photographers usual Trioplan.

All inscriptions on it: Meyer Gorlitz Nr.1071127 Trioplan 3.5/210.

Aperture range is 3.5-32 and it has 19 blades. Glass is uncoated.

http://www.prorock.info/11/Trioplan.jpg I have bought it for 70$.

From here the first question: it is not dear for Trioplan?

Then I have noticed, that the maximal aperture is very similar with

Portrait-Trioplan 8 1/4 inch f/3.2. I have compared schemes and have

been strongly surprised by their similarity!

http://www.cameraeccentric.com/html/info/meyerc/p21.html At not-

Portrait Trioplan aperture was 4.5, 6.3 etc and front glass-element

was convex from two parties. And at mine, as well as at Portrait

Trioplan a forward element convex in front and flat behind. Like

that: http://www.prorock.info/11/Trioplan2.jpg But a back element

from lateral aspect convex, and with internal almost flat - slightly

convex. And at mine Trioplan the groove for lense-hood inside, not as

Portrait Trioplan. Further the second question: my Trioplan is

evolution of old Portrait Trioplan? How it will behave at shooting

with the open aperture? (while I do not have opportunity it to

photograph - I shall explain further).

The girl who has sold to me this objective and the camera has told,

that its parents photographers have taken out this camera from

Germany precisely before war. But, by numbers from this reference

http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=004uzc I have an

objective of 1949. To whom to trust?:-)

And the most important question: with what shutter I can use this

lens on mine Linhof Technika 6x9. I understand, the question can seem

silly. But can be will approach Copal 1? The movements for portrait

are not necessary to Me and objective 210mm Trioplan designet for

5x7. There can be apertures Copal 1 (30mm opening) enough to make

corner for wide-open f/3.5 aperture with lost-free light?

With greater respect, -= Shtativ

Shtativ, when I was a child we were terrified of the Soviet Union. One of the reasons was that you were so much better at mathematics than we were. Another misconception, I fear.

An f/3.5 210 mm objective has a maximum aperture of 60 mm. Yes, I know, entrance pupil really. But still and all, that's much larger than a Copal 3. Ilex #5 will do.

Buy if you want to mount the lens in front of a #1 for use on 6x9, that should work. I have some 210s that that I've shot on 6x9 mounted in front of a #1. I-51 (210/4.5), Boyer Beryl S (210/7.7), Konica Hexanon GRII (210/9). All cover 2x3 very well.

Remember that all the shutter's aperture (30 mm wide open) does is vignette the outer part of the cone of light projected by the lens. It doesn't reduce illumination on the film plane, it reduces coverage.

Good luck, have fun,

DAN FROMM:: "when I was a child we were terrified of the Soviet Union. One of the reasons was that you were so much better at mathematics than we were."

Nonsense! That's a typical comment from an American who doesn't know that 2+2=5 ... given an appropriate value of 2.

Russian Federation, as well as other countries, it is not necessary to be afraid - it should be respected and loved ;-)

Thanks for advice on a lens! My calculations were true - knowingly I have bought Copal #1 shutter.

Somebody can answer the first 3 questions on this lens?

-= Shtativ