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Question of the Day: What's the most interesting small town you've visited in South Africa?
Teleconverter
- Thread starter Pooky
- Start date
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Yeh I took a few shots like that today. Must say I'm quite impressed. Just a nuisance to keep holding the lens to the camera. Did you use a reversing ring?
No - elastic band.
Don't the extension tubes work for this?
Just heard about them but never tried it myself.
I have a 2X TC and it doesn't appear to have any macro qualities - actually a 2X TC is not for me, I'll look at trying a 1.4X TC and donate the 2X to a friend or family.
Just heard about them but never tried it myself.
I have a 2X TC and it doesn't appear to have any macro qualities - actually a 2X TC is not for me, I'll look at trying a 1.4X TC and donate the 2X to a friend or family.
koffiejunkie
Executive Member
You also need two lenses to screw into each other.
koffiejunkie
Executive Member
Aah, I missed that on the link I posted. There are others that screw directly onto the mount.
Deep Thought
Active Member
Stacked lens macro imaging
A technique I discovered involves using a normal stepping ring to get the front of the reversed lens as close as possible in diameter to fit inside the primary lens.
The outer diameter of a 55mm ring is rather close to the inner diameter of a 58mm thread, and all you do is add PTFE tape to make up the difference.
Works very well, Screws in and out, and gives a really snug, centered mount.
In the linked image, I've reversed a 50mm prime lens and attached it to a 300mm zoom, which gives me a 6.5mm (hor. edge to edge) field of view.
What one must bear in mind, is that any macro work requires high F-stops to get decent depths of field, usually F8 or higher. I find F11 to be a nice average.
Vignetting usually does occur, and is lens primary dependant.
The higher the focal length - the higher the magnification, the shallower the depth of field, and the less vignetting occurs.
The image shows immature plant lice on a rose stem. 6.5mmFOV.
A technique I discovered involves using a normal stepping ring to get the front of the reversed lens as close as possible in diameter to fit inside the primary lens.
The outer diameter of a 55mm ring is rather close to the inner diameter of a 58mm thread, and all you do is add PTFE tape to make up the difference.
Works very well, Screws in and out, and gives a really snug, centered mount.
In the linked image, I've reversed a 50mm prime lens and attached it to a 300mm zoom, which gives me a 6.5mm (hor. edge to edge) field of view.
What one must bear in mind, is that any macro work requires high F-stops to get decent depths of field, usually F8 or higher. I find F11 to be a nice average.
Vignetting usually does occur, and is lens primary dependant.
The higher the focal length - the higher the magnification, the shallower the depth of field, and the less vignetting occurs.
The image shows immature plant lice on a rose stem. 6.5mmFOV.
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Deep Thought
Active Member
Yes. Aphids or plant lice. Just updated the post to indicate this.
BTW. if one uses a teleconverter to increase the focal length, you will increase magnification (etc.) but you'll lose 2 F-stops of exposure.
BTW. if one uses a teleconverter to increase the focal length, you will increase magnification (etc.) but you'll lose 2 F-stops of exposure.
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