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Got a thin skin? Then look elsewhere. Post a link to an image that you've made, and invite others to offer their critiques. Honesty is encouraged, but please be positive in your constructive criticism. Flaming and just plain nastiness will not be tolerated. Please note that this is not an area for you to showcase your images, nor is this a place for you to show-off where you have been. This is an area for you to post images so that you may share with us a technique that you have mastered, or are trying to master. Typically, no more than about four images should be posted in any one post or thread, and the maximum size of any side of any image should not exceed 950 px.
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 by moz on Tue Jan 22, 2008 8:00 pm
I'm trying to learn to TIG weld bicycle frames, because I'm a bit over brazing. So I've been welding up test pieces and cutting them up to see what they look like on the inside. I don't actually have a macro lens per se, but I have the 24-70L and 70-200/2.8 IS as well as a 500D and macro tubes to go on them (and teleconverters). The 70-200 gives more magnification as well as IS but it's a struggle to focus even at f/13. Can anyone suggest better ways to get shots that show the detail of the weld, especially in the confined spaces like below - I'd like to get the curve of the weld more visible if i can:   (second shot just to show that some bits are working-ish) I find that using flash or direct lighting just gives me lots of highlights and more dynamic range than the camera can handle. I fear I may need a softbox - does that sounds right? Also, my tripod wobbles a lot, so I'm using mirror lockup and hoping that the focus I get when touching the lens is valid when the shot is taken (without me touching the camera). Should I look at welding up a frame to do this? It would be relatively easy (and cheap) to make a light tent with camera bracket to do this with, but it would be bulky and I'd only use it occasionally. So I'd rather hear suggestions like, I dunno, bolting the ball head to something solid instead of using the tripod, and making a softbox/diffuser for the sunlight. Would those help or is there a better way? Photoset including shot of the camera setup: http://moz.net.nz/photo/2008/01/22-welderplay/index.phpthanks Moz
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moz
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by moz on Thu Jan 24, 2008 7:07 am
Bindii wrote:Why is your tripod wobbly?.. and have you tried using a slower exposure and a shutter release cable to take the shot.. are you using manual focus?.. I always find manual focus to be sharper than auto on macro's..
Thanks Bindii, I'll try slower shutter. I've been using manual focus and mirror lockup (with a 2s delay) to get things as stable as I can. I think it's my ball head (Benro KB2) that just doesn't like big lenses held vertically. I'll try again soon.
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moz
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- Location: Coburg, Melbun.
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