Extension tube formula?
50mm lens + 50mm of extension = 1:1
100mm lens + 100mm of extension = 1:1
25mm lens + 50mm of extension = 2:1 or double life size.
If you need an exact formula to cover various focal and extension size, let me know.
When used with a macro lens, I'm not sure what the formula is, but here's an example shot to show magnification gain when used with a 50mm macro.
Insanity: doing the same thing over, and over again expecting different results. (Albert Einstein)
www.dangphoto.weebly.com
Latest Reviews
The Sigma DP2 Quattro is a rare breed. It’s a large-sensor point-and-shoot camera with a 29MP sensor and a 30mm f/2.8 fixed lens. The question is, who is this camera for? Let’s find out!
I’ve been testing the Vanguard VEO 5 264CB-160S for several weeks now, and I have to say that my first impressions are nothing but good. Vanguard has knocked it out of the park yet again!
The Fujifilm X-H2s is Fuji’s flagship hybrid APS-C mirrorless camera. It launched in the summer of 2022 and has been impressing photographers and videographers alike ever since!
The Sony a9 III is a powerhouse professional-grade camera. The question is, should it be the next item in your camera bag? Find out if it’s worth the money in this comprehensive review!
Forum Top Posters
-
1
Suni Park 2 posts -
2
Screamin Scott 2 posts -
3
Don Hatch 1 post -
4
Carl Mendez 1 post
 |  |
 |  |
Latest Articles
The Canon EOS R1 was finally released last week, and the question is - does it live up to the hype? Let’s dive in and explore firsthand what this camera does and doesn’t offer.
Improving your photography skills takes time, effort, and dedication. But with these unique exercises, you can make the process of becoming a better photographer more fun, too!
Night street photography is a fun pursuit with opportunities to develop your skills with portraiture, light trails, and architectural photography skills - and your nighttime photography skills, too!
The Canon EOS R5 Mark II has been unveiled, but it has a hefty price tag. If it’s out of your budget, the original Canon EOS R5 is a fantastic option. Learn more about it in this guide!
The Sigma DP2 Quattro is a rare breed. It’s a large-sensor point-and-shoot camera with a 29MP sensor and a 30mm f/2.8 fixed lens. The question is, who is this camera for? Let’s find out!
You need to try unique newborn photography ideas from time to time to keep your inspiration levels up. With the ideas in this guide, you can do just that!
What is the best landscape lens for photography - a prime or a zoom? The answer is a little murky, as it depends on the specific situation. Learn more about these lenses in this detailed guide!
Lightning photography is a tricky beast, but with the right tips, tricks, and tools, you can make the most of the next storm that rolls through. Learn some essential techniques in this guide!