Exposure Calculator

Hi,
For anyone interested in long exposure photography there are free apps available, for Android and iPhones, that calculate the new exposure with ND filters attached. In my experience you need to add extra time to the new calculated exposure, to prevent under exposure. The amount of extra exposure time required depends on the exposure time and the camera make/model. Reciprocity failure is alive and kicking in the digital world!
I also have a printable version of an exposure calculator, if anyone wants a copy just let me know.

David.

Dave can you recommend an app for iPad/iPod?
Ted

Hi Ted,

There are a number available for the iPhone, when got mine about 12 months ago there was very little choice. The problem now is that they are making them over complicated by adding new abilities, when all you want is a simple calculator to tell you what to change your shutter speed to when you have added ND filters.
If you search on "Long Exposure Calculator" you will see quite a list, have a look through to see if any suit you. Here are three I found that look reasonable:

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I am hoping to get to the club tonight so we could talk about it then.

David.

Hi David
Thanks.The app you recommended is now installed. If you're at the club tonight I'll appreciate your comments on some of my attempts at long exposures.
Ted