Hi Greg,
Alistair's response is right on the money (and more detailed than I
could go into!).
The critical question here is what camera is your friend using? The
upper limit in terms of ISO/image quality will be decided by that
factor.
Don't worry about trying to convert ISO/ASA etc as it's really not
relevant. Its all about finding the ISO where he is happy with the
image quality. Obviously 1200ISO is too high as evident by the lack of
image quality.
Laurie's point about filament feather detail is much more about
subject distance rather than ISO in my opinion. eg - If you are 30m
away from a robin you won't get fine feather detail regardless of ISO,
but get to 5m away and the detail is able to be captured beautifully.
(From then its as much about optics and camera quality as ISO.)
Appropriate shutter speeds are another thing again and will vary from
person to person in terms of what they are able to hand hold etc.
Cheers
David Stowe
On 30/07/2010, at 9:32 AM, Greg Little wrote:
Gooday birders
A friend of mine has a digital SLR camera on which he sets the ISO at
1200
to take bird photos with a 100 - 400 zoom lens. However the images
seem a
bit grainy, in old speak, or noisy in digital speak. We have tried to
get
closer to the bird subjects but the images seem to lack the sharpness
and
richness of colour and detail that I have seen produced by some of the
photographers on birding-aus. So, could you people who produce the
superb
digital images of birds please offer some advise on ISO settings. If
possible could you relate the digital ISO settings to the ASA settings
of
film. There may be something else he needs to know so any advise would
be
appreciated. For myself I do not have a digital SLR camera and probably
won't get one for a while yet.
Greg Little
Greg Little - Principal Consultant
General Flora and Fauna
PO Box 526
Wallsend, NSW, 2287, Australia
Ph 02 49556609
Fx 02 49556671
www.gff.com.au
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