Richard Tuohy Posted December 18, 2010 Share Posted December 18, 2010 Hello all, shot my first roll with my Konvas 1M yesterday. I shot a roll of Ektachrome duplicating film which is 12 asa and tungsten and has a gamma of 1 (was intended for slide duplication). projected results look great. To shoot outdoors, I had to tape some 85 filters to the front of the lenses ... but the camera kit came with a set of orange filters marked 'OC 12'. Are these colour correction filters or where these intended for black and white use? They seem quite a bit darker than normal 85 filters. Any info would be appreciated before I go out and buy a set of 85s that fit the lenses. cheers, richard Link to comment Share on other sites More sharing options...
Mark Dunn Posted December 19, 2010 Share Posted December 19, 2010 The 85 filter is more of a brown colour. If this OC12 is pure orange then it's probably for B/W use. However, you have a set, so they could be 85s with combined ND. I have a 6" set with 85, 85ND3 and 85 ND6 (1 and 2 stops, as you probably know already). How you find out for sure without an expensive film test or a densitometer or colour temperature meter I don't know. Perhaps Olex will chip in. Link to comment Share on other sites More sharing options...
Sergey Krutko Posted December 19, 2010 Share Posted December 19, 2010 Hello all, shot my first roll with my Konvas 1M yesterday. I shot a roll of Ektachrome duplicating film which is 12 asa and tungsten and has a gamma of 1 (was intended for slide duplication). projected results look great. To shoot outdoors, I had to tape some 85 filters to the front of the lenses ... but the camera kit came with a set of orange filters marked 'OC 12'. Are these colour correction filters or where these intended for black and white use? They seem quite a bit darker than normal 85 filters. Any info would be appreciated before I go out and buy a set of 85s that fit the lenses. cheers, richard Hello! OC 12 is only for B/W use. On BW stocks it makes blue sky dark, skin tone makes lighter and takes about 2 stops. Of course, you can use OC 12 with colour stocks but it will be look like as your creative vision :) Good luck! Link to comment Share on other sites More sharing options...
Richard Tuohy Posted December 19, 2010 Author Share Posted December 19, 2010 Right-oh, thank you both. cheers, richard Link to comment Share on other sites More sharing options...
Olex Kalynychenko Posted December 20, 2010 Share Posted December 20, 2010 Russian film making industry had a few type of filters OC series. This is orange filters with difference thickness of glass. OC-5 ( 1 mm ), OC-6 ( 2 mm ), - color correction filters for use of "T"( russian LN film ) films at daylight ( show like 85 filters) . OC-12 - middle orange filters for B&W film shooting. OC-14- high density orange filter for B&W film shooting. As of OC-12 - transparent curve have rate 560-2700 nM and show as of "hard cutting curve". OC-6 have elastic curve at rate 300-600 nM and hard curve 600-2700 I can send curves of a OC12 and OC6 filters by PM. As for me, OC-12 do not color correction filter for color film, this is filter for B&W filming. I recommend to find original 85 filters. Link to comment Share on other sites More sharing options...
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