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DPChallenge Forums >> Hardware and Software >> Having trouble using my Canon 100mm Macro, tips?
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Showing posts 26 - 29 of 29, (reverse)
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08/04/2006 02:42:44 PM · #26
Originally posted by JudyMI:

I am having focus problems also with my Canon 100mm lense. I bought it when I was in film. Now I am using, or attempting to use it, on my Canon 5D. No luck! And I have a bird's nest right on a plant on my front porch, only 2' off the ground, perfect for photographing the progess of the eggs and chicks.
I have put the lense on "limit", put on my macro ring light, used my tripod with remote, used the 400 even 800 "speed", what else can I do? The camera just "searches" back and forth and won't land. The ring light has lamps you can use prior to taking the picture to light up the subject and I have had those on. Nothing.
HELP! The birds will be out of the nest. Judy


The general consensus in this thread was that manual focus is the way to go. Have you tried that?
08/04/2006 02:43:53 PM · #27
Originally posted by JudyMI:

I am having focus problems also with my Canon 100mm lense. I bought it when I was in film. Now I am using, or attempting to use it, on my Canon 5D. No luck! And I have a bird's nest right on a plant on my front porch, only 2' off the ground, perfect for photographing the progess of the eggs and chicks.
I have put the lense on "limit", put on my macro ring light, used my tripod with remote, used the 400 even 800 "speed", what else can I do? The camera just "searches" back and forth and won't land. The ring light has lamps you can use prior to taking the picture to light up the subject and I have had those on. Nothing.
HELP! The birds will be out of the nest. Judy


What is your camera setting? One shot or ??? With Macro like this really want to be using One shot setting. I had ... well all my lens, but particularly the 100 really seach when lighting was low, changing to one shot really helped me get some great shots. Expecially shooting the three toed sloth. With a flash and one shot I have been able 10-22 lens particularly to shoot things that i couldn't see clearly enough to manual focus on. It was that dark.

Message edited by author 2006-08-04 14:45:40.
08/04/2006 03:54:07 PM · #28
Autofocus mechanisms work on optical contrast. If you try to take a picture of a grey card your camera will be utterly unable to autofocus on it. Most likely your bird's nest lacks sufficient contrast for the autofocus to get lock. You'll have to use manual focus. Be sure your viewfinder diopter is set for your eyesight. You'll know it's right when the the little boxes on the viewscreen are crisp and sharp. Whe you manually focus, look in the viewfinder and let your eye focus on those boxes, then "bring the image up" until it is also in focus.

R.
08/04/2006 04:43:04 PM · #29
Great shots mk! Glad to see you making use of that lense. ;-)

Originally posted by mk:

Are you having any better luck, Jen? I am finding that about 95% of the time, I need to manual focus. I've been experimenting some more but find I am still having problems with proper DOF.

I found a dragonfly today and was able to get some decently focused shots, although unfortunately against a pretty horrible background.





Works nicely for cat portraits, too. ;)



Now I am off to clean my disgusting, disgusting sensor!

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