If you’ve seen the pictures posted these days, you’ve probably guessed I just received my “personal birthday gift”.
So my choice was the Phottix 3-Ring Auto-Focus Extension Tubes. They are cheaper than the Kenko, and it look likes they provide quite the same experience.
You want to know what extension tubes are made for? I recommend you to have a quick look here: How do Macro extension tubes work?
Before the purchase, I made a few researches to know what will be the new ratio, using these tubes with a DSLR (Canon 500D) and the 50mm f/1,8 lens, and did not find a lot of information. Opening the box, I was pleasantly surprised to find a “Image magnification ratios and exposure factors for a 50mm Standard Lens” table in the notice:
So here it is:

After a (very) quick look to the notice, I finally mounted all the rings on the camera, and added the 50mm lens. Ok I did not took my tripod with me this morning… A big mistake!
So the firsts impressions were good, the hardware looks quite good, and easy to use. After several combination, I’ve notice an issue appearing, the camera tell me the lens is not well connected, and advise me to clean the connectors. I already noticed the same kind of errors with my Tamron 17-50 lens, so I attached this lens, no issue. At the end, only the Canon 50mm f1/,8 has this issue with the 3 tubes together. As I’ve planned a “cleaning session” of my camera & lenses soon, I’ll update you with the results!
Anyway, back at home, I had a chance to take a few pictures, and the first comment was: wow, I understand why focusing rails can be useful! The second was, ok that’s what I was looking for, with the price I planned to pay for. Good deal so!
first try
You can see the 4 first pictures exported from this session:

comparison
New exercise is now to compare the tubes.
Here is “the reference shot”: 50mm – f/1,8 – 1/50s – ISO800 – no tube

Now, playing with the tubes, without combining them:
|
f/1,8 |
f5,6 |
f11 |
| 13mm |
 |
 |
 |
| 21mm |
 |
 |
 |
| 31mm |
 |
 |
 |
The macro is impressive, and I can’t wait to try them with a macro lens!