[Yakim]

[quote name='mst' timestamp='1310462378' post='9945']

Not at all, at least to me ... I'm currently exploring the world of close-ups with 20mm on FX <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='' /> It's fun ... and yes, it's the Sigma 20/1.8, in case you wonder.



-- Markus

[/quote]



1:4 is nothing. You should try the 24/3.5 II which gets to 1:3. Now that's a significant difference... <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='' />

[mst]

Don't worry, Yakim, if I really want more I can switch to either the Sigma 24/1.8 (wobbles like crazy, though) or the PC-E 24 ... both 1:2.7 <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='' />



Talking about the Sigma 20 again: it seems to have quite decent bokeh for a wide angle lens.



-- Markus

[Yakim]

I give up. 1:2.7 is unmatched. <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='' />

[Brightcolours]

It is all about MFD, nothing else. So... if you want more magnification, you select the lens that is shorter. With a 12mm extension tube you then will get closer. The TS-E 24mm f3.5 II is not a good candidate, as it is too long and focus will move past the front element <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='' />.



The PC 24mm is not the shortest lens either. The Sigma 20mm f1.8 and 24mm f1.8 macro both will do better with a 12mm extension tube attached. And yes, both these lenses are a lot better and versatile than the "interweb" would have one believe.



For this reason I will try the Canon 24mm f2.8 sometime, it is very compact and has good optics. It will reach 1:1.5 (with 12mm tube). With a 25mm tube it can reach 1:1, but then the subject will be against the front element.

The Sigma being 3.5 cm longer than the Canon makes that even though the Sigma can focus closer, it will not get better magnification than the Canon with 12mm extension tube. But 20mm still is quite a bit wider than 24mm...



Plus for the Sigma is the magnification RANGE, though. The Canon 24mm will do 1:6 without tube, 1:2 to 1:1.5 with 12mm tube (and 1:1 with 25mm one).

The gap between 1:6 and 1:2 is big and not very flexible.

[Guest]

[quote name='Yakim' timestamp='1310808238' post='10059']

I give up. 1:2.7 is unmatched. <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='' />

[/quote]



Extension tube, aynone? <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='' />

[Yakim]

[quote name='BG_Home' timestamp='1310810901' post='10062']

Extension tube, aynone? <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='' />

[/quote]



They're for sissies.... <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/smile.gif' class='bbc_emoticon' alt='' />

[Yakim]

[quote name='Brightcolours' timestamp='1310810845' post='10061']

It is all about MFD, nothing else. So... if you want more magnification, you select the lens that is shorter. With a 12mm extension tube you then will get closer. The TS-E 24mm f3.5 II is not a good candidate, as it is too long and focus will move past the front element <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/wink.gif' class='bbc_emoticon' alt='' />.[/quote]



....but just to be sure, I just tried the 12mm tube. There's still a 2cm gap.

[Brightcolours]

[quote name='Yakim' timestamp='1310818315' post='10070']

....but just to be sure, I just tried the 12mm tube. There's still a 2cm gap.

[/quote]

When? When you focus closest possible?

[Yakim]

[quote name='Brightcolours' timestamp='1310819516' post='10072']

When? When you focus closest possible?

[/quote]



Actually, it's the opposite.

[Brightcolours]

[quote name='Yakim' timestamp='1310883206' post='10084']

Actually, it's the opposite.

[/quote]

The opposite? So 2 cm when you have the lens at infinity?