I have a patch of trilliums at the edge of my garden. I've tried to photograph them for years and have yet to get a pic worth keeping. Do any of you have photos of trilliums so I can see how you do it.
Obviously, the "secret" is to get up close. I've been trying to take pictures of bunches of them and that's why they don't work. Here are three I took this morning. No post and not in the league of the others above, but a start.
Nikkor 300 mm, f:4 on D300s
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These are a good illustration of why I like a short lens (55 or 105) for wildflowers. You can get in close to avoid other "stuff" getting in the way as in your shots. You could try a square crop on either of the last 2 to get rid of the out of focus foreground plant on hte left.
Do stick on a shorter lens when you go out today, though.
If you want another short micro the new 60 Nikkor is very good. I've been looking at the specs. of the Sigma 70 and if I didn't already have a short micro I'd be seriously considering it.
Oh, that's the secret. All I have to do is get the 60 Nikkor and I'll be able to take photos like yours <grin> I'll try my Nikkor 85 f:1.4 today. I have a Nikkor 50 mm f:1.4 but I've never been fully happy with it.