dhessel Posted July 27, 2015 Share Posted July 27, 2015 Finally going to be getting a mattebox and using solid NDs rather that a variable one. I am wanting to get 2 ND s that when stacked will give me 3 strengths. I will be wanting to shoot ISO 800 at 1/48 second from 2.8 - 5.6, maybe 8 at most. What do you all think would be the best strengths to get for this scenario. Thanks. Quote Link to comment Share on other sites More sharing options...
Liam Posted July 27, 2015 Share Posted July 27, 2015 What camera? Not an expert at all, but Hurlbut often examines the point with different cameras when too much nd causes ugly infrared pollution. Think it has to do with the filter the camera comes with right on the sensor, hard to find out without tests. Don't know about adding an infrared filter along with the nd at a certain strength or just being careful not to go too high with nd strength, but could be important to be aware of Quote Link to comment Share on other sites More sharing options...
Cinegain Posted July 27, 2015 Share Posted July 27, 2015 These 3- and 6-stops NDs from Breakthrough.Photography might be worth looking at: http://breakthrough.photography/product/x3-neutral-density/ . There's a 10-stops too. Quote Link to comment Share on other sites More sharing options...
Julian Posted July 27, 2015 Share Posted July 27, 2015 The Sunny f/16 rule is helpful to determine the approximate exposure for typical settings:Sunny: f/16 - ISO 100 - 1/100Overcast: f/8 - ISO 100 - 1/100Sunset: f/4 - ISO 100 - 1/100In your case, ISO 800 = 1/800. You want 1/48 (1/50), so you need 4 stops of ND to correct for the shutter speed. And 1 to 5 extra stops of ND to compensate for the aperture if you want to shoot at f/2.8.3 + 6 sounds about right. Enough to tame the bright sunlight when you combine them, and good for overcast/sunset using them separately. sudopera and Mat Mayer 2 Quote Link to comment Share on other sites More sharing options...
dhessel Posted July 28, 2015 Author Share Posted July 28, 2015 The Sunny f/16 rule is helpful to determine the approximate exposure for typical settings:Sunny: f/16 - ISO 100 - 1/100Overcast: f/8 - ISO 100 - 1/100Sunset: f/4 - ISO 100 - 1/100In your case, ISO 800 = 1/800. You want 1/48 (1/50), so you need 4 stops of ND to correct for the shutter speed. And 1 to 5 extra stops of ND to compensate for the aperture if you want to shoot at f/2.8.3 + 6 sounds about right. Enough to tame the bright sunlight when you combine them, and good for overcast/sunset using them separately.Thank you, that is what I was thinking as well but have no pratical experience as I have always been able to dial whatever ND I wanted. Quote Link to comment Share on other sites More sharing options...
Super Members Mattias Burling Posted July 28, 2015 Super Members Share Posted July 28, 2015 You could use your variable to test. Mark the stops on it if they're not already there and try different apeture/iso/nd combos and see what you feel you need the most. Xavier Plagaro Mussard 1 Quote Link to comment Share on other sites More sharing options...
Julian Posted July 28, 2015 Share Posted July 28, 2015 Thank you, that is what I was thinking as well but have no pratical experience as I have always been able to dial whatever ND I wanted.I don't have practical experience with fixed ND's either, so don't trust me on my word... Quote Link to comment Share on other sites More sharing options...
dhessel Posted July 29, 2015 Author Share Posted July 29, 2015 You could use your variable to test. Mark the stops on it if they're not already there and try different apeture/iso/nd combos and see what you feel you need the most.Good point, I will do that as well. Thank you. Quote Link to comment Share on other sites More sharing options...
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