Macro extension rings

[ruffdog64]

I have a sigma 105mm and am considering getting a set of extension tubes to enable me to get even more distance from my subject as flies etc seem to fly off if your too close ,my question is am I going to benefit from getting some that enable me to keep auto focus or should I keep using my cheapo ones that don`t, I`ve seem some that claim they keep the ability to use auto focus for £29.99 which does seem very cheap,many thanks Harvey

 

[Phil Young]

Get the AF ones because manual EXT rings will immediately stop the lens down and ir will be too dark to see...unless your 105 is the D version where you can control the aperture from the lens.

 

[modchild]

I got a set of Kenko AF rings to use with my Canon 100 L macro and they are great. They are a bit expensive though, but now there's a whole load of cheaper AF ones that are available. A mate got a set of manual and only used them once and now they are a pen holder on his desk. Too fiddly and too slow and after he borrowed mine for a try he got a AF set straight away.

 

[sk66]

I'm quite fond of the Meike Helicoid extension tube. (also sold under other brands). It allows AF, and "zooms" between 46-68mm extension. Kind of functions as a macro rail...

Seems well made, mostly metal... I've hung a 150mm f/2.8 macro and D4 off of it...

 

[Phil Young]

They don't have to be expensive, my af ones were £40 off eBay and allow full metering and af (down to about 1:2).

 

[ruffdog64]

Thanks guys