ISO setting

To: "Greg Little" <>
Subject: ISO setting
From: David Stowe <>
Date: Fri, 30 Jul 2010 11:18:50 +1000
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.
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


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