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When using extension tubes…

Started 10 months ago | Questions thread
DanRN
DanRN Regular Member • Posts: 208
Re: When using extension tubes…

East Gothia wrote:

DanRN wrote:

Atho wrote:

Is there an easy way to calculate the distance to which a lens will focus after adding a 10 or 16mm extension tube or both? (I know I will lose infinity focus, whatever the h€|l that means)

Hint. It must be really easy because I’m really stupid. No point in offering any complicated equations because I will just lose the will to live.

See if this page is of any use:

http://extreme-macro.co.uk/extension-tubes/#calculator

It is still very useful, the laws of physics are not updated that often fortunately! I'm sort of old school and like to check if what I see/want is realistic. Starting to test different lenses with bellows with a large adjustment range is easier if you can figure out what to expect (and what is "out of range") like when you have a specific object you want to catch and get a reasonable result in the end.

... and then there is all the software in the camera doing the actual focusing and the lighting ... and ... and ...

I’ve gotten to the point where the only time I autofocus with macro/close ups is when stacking. If a static subject, I’ll use a rail. If not, or I’m using a flash, I’ll rock the camera back and forth manually. The results there definitely vary.
But, if it were easy, where’s the challenge in that? ;p If I blow a shot, it’s not like I missed Bigfoot or a UFO… there’ll definitely be more insects.

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