chris salata Posted January 9, 2005 Share Posted January 9, 2005 I am thinking about buying a B&L Protar Series IV 10x12 for my 8x20Korona view camera and I was wondering if any of you ULF'ers have hadany experience with this lens. From what I have read about the otherProtars it should be a pretty sweet lens. As for whether or not itwill cover 8x20 I am relying on this website:http://www.mamutphoto.com/ULF/lenses.html which lists lens data forULF cameras. This information looks correct, but you never know.Thanks and if you know anything about Korona ULF cameras be sure tocheck out my other posts and share the wealth. Link to comment Share on other sites More sharing options...
tracy_storer1 Posted January 9, 2005 Share Posted January 9, 2005 Should be 10.25" or 260mm. According to my coverage table, it'll cover 12x15 at "small stops" Nice for 11x14 with some little movements. Link to comment Share on other sites More sharing options...
c_p_goerz Posted January 9, 2005 Share Posted January 9, 2005 The series IV 10x12 was the last of the Protars of that series with the widest angle of coverage. I have had a few vintages of this lens and found that while it can cover at 8x20 the edges did get a litle soft unless you did some hyperfocal moves. The lens should be used at F64 all the time on 8x20. Contrast is about medium/low so a #15 or 22 is always handy. Some vintages of the series IV lens perform better when the front and rear cells are switched over, you may give that a try and see what works best. CP Goerz Link to comment Share on other sites More sharing options...
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