https://www.ebay.com/itm/Schneider-K...8AAOSwrNRdO4B8
Here is what I look for. Black 150mm Schneider f5.6 in barrel, the black ones are a little younger in vintage than the chrome silver. I don't see any "Schneideritis" which is a loss of black coating around the outer edges of the lens. Old Fuji an Rodenstocks can have the 'itis, it looks bad but dosen't affect quality. The price is not bad, however you will need to add a #0 retaining ring (easy to find). This lens is the correct vintage for the Sinar Norma shutter. Also the early Schneider lenses are "convertible". If you unscrew the front cell, the lens becomes a 265mm F12 of decent quality. It's been recommended to use an orange filter when using it in tele mode, it improves it's quality.
That lens you show is a DB auto Sinar lens, which came out much later than Norma. I've no experience with DB lenses, they did make a shutter later on that specifically takes the DB lenses. I wonder if that is workable with the early Norma shutter?? I know that the later shutter had an iris mechanism incorporated into them. Hope all this helps!
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