Is this a convertible lens

[kiteipix]

<p>I have an older Schneider-Kreuznach #11787011 Symmar. In white it reads 1:5.6/210 and in green1:12/370. is this a convertible lens. both elements at 210 and front element at 370? Also does anyone know if this lens is coated - I can't tell. Finally the lens displays "Schneideritis - an irregular silvering around the lens barrel behind the glass. This has not seemed to affect the picture taking quality but I'm curious as to whether it might cause other problems.<br>

Thanks, Mike</p>

[bob_salomon]

<p>Yes it is convertible. Yes it is coated. No, it is not multi-coated</p>

[norman_valentine]

<p>I think that it is both elements for 210 and rear element only for 370.</p>

[david_l3]

<p>I used to have a Rodenstock 210mm convertible lens. It was excellent at 210mm with both lens cells. But somewhat soft with either the front or rear cell, and hard to focus as well. </p>

[jnanian]

<p>mike</p>

<p>https://www.schneideroptics.com/info/faq/photography.htm</p>

 

[jnanian]

<p>mike</p>

<p>https://www.schneideroptics.com/info/faq/photography.htm</p>

 

[colin carron]

<p>I also had a a couple of convertble Symmars. They were all single coated. I occasionally tried using them in their converted form with front element removed and they worked reasonably well. I would have been pushed to tell the difference between the converted lens and the whole thing. The slow speed of the converted lens made it tricky to focus and I didn't like having the shutter exposed.</p>

[john_galuszka]

<p>Both elements: 210mm, f5.6, 294mm circle of coverage, 70 degree angle of view</p>

<p>Rear element only: 370mm, f12</p>

<p>Front element only: 475mm, f16</p>

<p> </p>

[jnanian]

<p>be aware that the "nodal points" / where the lens focuses is beyond the FL of the lens ..<br /> for example when at the 370 configuration it takes more than 370mm to focus the lens at infinity ...<br>

this is probably true for the 475 configuration too ...<br>

it takes a lot of bellows draw ...</p>

<p>have fun</p>