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<blockquote data-quote="BackdoorArts" data-source="post: 346601" data-attributes="member: 9240">If by &quot;blank&quot; you're talking white, then what you're seeing is that even at f/44 the ND's you are using aren't sufficient to allow for the 2, 3 or 4 second shutter speeds and you're getting white wash.&nbsp; If you're getting black then it's the opposite, you need to go longer.&nbsp; Make sure you're at ISO 100 and not on Auto ISO.Also, grab yourself a ND Timer app, meter without the ND, and and then check the shutter speed you'll need with the same settings for the same exposure with the ND applied.&nbsp; ND4 is almost worthless in sunlight and will only gain you 2 stops.&nbsp; So, if your camera wants to shoot at 1/60s without the ND, you'll only get to 1/15s with an ND4 - anything longer and it will overexpose, which likely explains your &quot;blank&quot; image.&nbsp; You're going to want a 9 or 10 stop ND.&nbsp; Don't waste your money on the variable ND's as they will invariably produce hot spots after 6 stops.&nbsp; I've been through this and know your frustration.&nbsp; If you have multiple small stop ND's (ND2, 4 &amp; 8), stack them and at least you'll get additive effects (stacking all 3 will give you 6 stops).</blockquote>

[QUOTE="BackdoorArts, post: 346601, member: 9240"] If by "blank" you're talking white, then what you're seeing is that even at f/44 the ND's you are using aren't sufficient to allow for the 2, 3 or 4 second shutter speeds and you're getting white wash. If you're getting black then it's the opposite, you need to go longer. Make sure you're at ISO 100 and not on Auto ISO. Also, grab yourself a ND Timer app, meter without the ND, and and then check the shutter speed you'll need with the same settings for the same exposure with the ND applied. [U][B]ND4 is almost worthless in sunlight[/B][/U] and will only gain you 2 stops. So, if your camera wants to shoot at 1/60s without the ND, you'll only get to 1/15s with an ND4 - anything longer and it will overexpose, which likely explains your "blank" image. You're going to want a 9 or 10 stop ND. [I]Don't[/I] waste your money on the variable ND's as they will invariably produce hot spots after 6 stops. I've been through this and know your frustration. If you have multiple small stop ND's (ND2, 4 & 8), stack them and at least you'll get additive effects (stacking all 3 will give you 6 stops). [/QUOTE]

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