Which shutter for Dialytar SerieT 210/4.5 ?

Accidentally got Dialytar SerieT 210/4.5 (doppel anastigmat) without shutter

for 20$. I found only one illustration where this Dialytar was mounted on Betax

No. 4 shutter. What shutter alternative is worth to look for? Maybe there is

some info on the net about front / rear elements spacing? I have an idea to

mount temporarily front / rear elements on tube with fixed diaphragm on the

middle. Screw diameter is approx. 57 mm

Vaidotas,

What you will discover with old lenses is that they are not usually standardized in thread or spacing, so the chance of finding a shutter that the threads and spacing - not to mention aperture scale - will be correct is very, very, small.

With old barrel lenses, you have basically two choices: a front mounted Luc shutter or a rear mounted Packard, or having the lens custom mounted in a shutter with an accurate aperture scale. The first option gives you B, T, and about 1/25th, the second option gives you everything you want for about $400.

So when you buy a barrel lens, you need to be prepared to use it as-is or pay out big money.

Steve

Vaidotas,<p>

the shutter size that IMO comes closest (assuming that Laack Rathenow preferred German-made shutters for mounting their lenses)is a COMPOUND No. 3 (3-X Tube 7) for lens cells front and rear with M 55,69mm x 40tpi; shutter overall length is 37mm. But this is only a guess based on my impression that most 4.5/210 lenses of that time (Xenar, Tessar ..) were sold in Compound 3 shutters. <p> Determining proper spacing is difficult (not to say impossible)if one cannot get hold of the designer's lens description or an original barrel for computing resp. copying the measurements. The "Dialytar Serie T, 1:4.5" was apparently made in two versions: one being unsymmetrical whereby 2 of the 4 lens were cemented; the other type being symmetrical with 4 air-spaced lenses. (source: L. David "Photographische Praktikum" 1931; Hartmut Thiele " Deutsche Photooptik von A-Z", 2007)