Reply to thread

Message

<blockquote data-quote="dr_eyehead" data-source="post: 315328" data-attributes="member: 25249">I read that some of the Canons have an option to turn the iso speed down to 50, maybe the Nikon's have this too? Anyway, mine only goes down to 100, which is probably low enough. But I am thinking about doing starscapes, or at least trying to capture something half decent with what I have. I think the technique is to take a series of 30s exposures and merge them together somehow. Also, no reason why I can't take a shot of the foreground using a different method and layer it onto the starscape.Anyway, maybe there will be a time when lower ISO speeds for longer exposures will come in handy...So I was just wondering if this can be achieved by simply placing a filter on the lens? ie. a filter which reduces the intensity of the light by 50% would surely effectively also reduce an ISO setting of 100 to 50, or maybe not to the same scale. There are obviously going to be issues with uniformity over the spectrum of light but in theory that should work, right?</blockquote>

[QUOTE="dr_eyehead, post: 315328, member: 25249"] I read that some of the Canons have an option to turn the iso speed down to 50, maybe the Nikon's have this too? Anyway, mine only goes down to 100, which is probably low enough. But I am thinking about doing starscapes, or at least trying to capture something half decent with what I have. I think the technique is to take a series of 30s exposures and merge them together somehow. Also, no reason why I can't take a shot of the foreground using a different method and layer it onto the starscape. Anyway, maybe there will be a time when lower ISO speeds for longer exposures will come in handy... So I was just wondering if this can be achieved by simply placing a filter on the lens? ie. a filter which reduces the intensity of the light by 50% would surely effectively also reduce an ISO setting of 100 to 50, or maybe not to the same scale. There are obviously going to be issues with uniformity over the spectrum of light but in theory that should work, right? [/QUOTE]

Verification