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When using extension tubes…

Started 10 months ago | Questions thread
BBbuilder467 Veteran Member • Posts: 7,057
Re: When using extension tubes…

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.

Infinity is the opposite of minimum focus, so you can focus on distant subjects.

When you add the extension tubes,the infinity setting will then be inches. It won't focus if you aren't close enough.

With a micro 4/3 at 45mm, I'd be nearly touching the subject with 26mm tubes. I didn't bother to stack them or I was too close.

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