ND Filters
Posted 16/10/2010 - 21:12
Link
Paul you need good light though.
Some even talk about 20-30 seconds at f8 or f5.6 ISO 1600 so take your tripod with you.
Some companies are able to remove the filter infront of the sensor and replace it with one that doesn't cut infra red light or replace it even with an infra red filter so you don't need to use one infront of the lens.
Some even talk about 20-30 seconds at f8 or f5.6 ISO 1600 so take your tripod with you.
Some companies are able to remove the filter infront of the sensor and replace it with one that doesn't cut infra red light or replace it even with an infra red filter so you don't need to use one infront of the lens.
Stefan
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
Posted 16/10/2010 - 21:38
Link
Here is a review about a variable ND filter.
http://www.ephotozine.com/article/Light-Craft-Workshop-Fader-ND-Mk-II-filter-143...
http://www.ephotozine.com/article/Light-Craft-Workshop-Fader-ND-Mk-II-filter-143...
Stefan
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
Posted 17/10/2010 - 08:56
Link
Thank you Stefan
Pentax K10d, KM, kit lens 18-55,Sigma 28-80, Sigma 55-200, Sigma70/300 APO , Tamron 400mm Prime, Cosinon 135 prime,Ricoh 55mm.
Posted 17/10/2010 - 17:33
Link
Anonymous wrote:
Am I also correct in assuming (a deadly thing to do) that they have no impact at all on colour? (Neutral?)
That's the theory, but Cokin's ND grads have a reputation for giving images a slight magenta cast.
Am I also correct in assuming (a deadly thing to do) that they have no impact at all on colour? (Neutral?)
Posted 17/10/2010 - 17:36
Link
MrCynical wrote:
Most cheap ND actually Anonymous wrote:
Am I also correct in assuming (a deadly thing to do) that they have no impact at all on colour? (Neutral?)
That's the theory, but Cokin's ND grads have a reputation for giving images a slight magenta cast.Am I also correct in assuming (a deadly thing to do) that they have no impact at all on colour? (Neutral?)
Also Cokin have two types off filters the P and the A I believe those use the standard filters but the Z-pro and the X-pro use higher quality ones, they have less off a colour cast.
Stefan
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
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66 posts
17 years
Peterborough UK
The K-M and the K10D sensors are the same.
It has a filter that cuts Infra-red light so you need to use very long exposures.
I used 1 second at ISO400 for that shot, as you can see the sun was even in the photo so with other shots you might need to push it even to 2 to 4 seconds.