Category Archives: PhotographyStackExchange

Upgrading from Canon 60D

Part of my dad’s inheritance was a Canon 60D with a fair number of decent macro lenses. Since I’ve been slack trying to use it (it’s been a year) my dear old mum is hinting that she might want it back. In the meantime though I’ve started enjoying taking pictures. I fitted the 50mm (below) and I had a good old chuckle seeing the images from the camera and the ones I’ve been taking with my old iPhone side by side.

Not wanting to be a jerk, I’m now considering

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Upgrading from Canon 60D

Part of my dad’s inheritance was a Canon 60D with a fair number of decent macro lenses. Since I’ve been slack trying to use it (it’s been a year) my dear old mum is hinting that she might want it back. In the meantime though I’ve started enjoying taking pictures. I fitted the 50mm (below) and I had a good old chuckle seeing the images from the camera and the ones I’ve been taking with my old iPhone side by side.

Not wanting to be a jerk, I’m now considering

read more

How do extension tubes affect the image circle?

If you abuse your lens by just stacking a bunch of extension rings one on top of the other, will this start to affect your image circle?

For instance, you have a lens that can just about cover your sensor with the image circle and you add a bunch of extension rings to focus up-close. Will the image circle start to show on your sensor or will it even widen? Or does it even matter?

Also, is it possible to express this relationship mathematically or does it depend on internal lens design too much?

Note

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How do extension tubes affect the image circle?

If you abuse your lens by just stacking a bunch of extension rings one on top of the other, will this start to affect your image circle?

For instance, you have a lens that can just about cover your sensor with the image circle and you add a bunch of extension rings to focus up-close. Will the image circle start to show on your sensor or will it even widen? Or does it even matter?

Also, is it possible to express this relationship mathematically or does it depend on internal lens design too much?

Note

read more